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Pull drm fixes from Dave Airlie:
"Just back from LCA + some days off, had some fixes from the past 2 weeks,
Some amdkfd code removal for a feature that wasn't ready, otherwise
just one fix for core helper sleeping, exynos, i915, and radeon fixes.
I thought I had some sti fixes but they were already in, and it
confused me for a few mins this morning"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm: fb helper should avoid sleeping in panic context
drm/exynos: fix warning of vblank reference count
drm/exynos: remove unnecessary runtime pm operations
drm/exynos: fix reset codes for memory mapped hdmi phy
drm/radeon: use rv515_ring_start on r5xx
drm/radeon: add si dpm quirk list
drm/radeon: don't print error on -ERESTARTSYS
drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES
drm/i915: Ban Haswell from using RCS flips
drm/i915: vlv: sanitize RPS interrupt mask during GPU idling
drm/i915: fix HW lockup due to missing RPS IRQ workaround on GEN6
drm/i915: gen9: fix RPS interrupt routing to CPU vs. GT
drm/exynos: remove the redundant machine checking code
drm/radeon: add a dpm quirk list
drm/amdkfd: Fix sparse warning (different address space)
drm/radeon: fix VM flush on CIK (v3)
drm/radeon: fix VM flush on SI (v3)
drm/radeon: fix VM flush on cayman/aruba (v3)
drm/amdkfd: Drop interrupt SW ring buffer
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git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD fixes from Lee Jones:
- Avoid platform ID collision in da9052
- Skip caching volatile registers in tps65218
- Use correct address base in tps65218
- Repair deadlock on suspend in rtsx_usb
* tag 'mfd-fixes-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
mfd: rtsx_usb: Fix runtime PM deadlock
mfd: tps65218: Make INT1 our status_base register
mfd: tps65218: Make INT[12] and STATUS registers volatile
mfd: da9052-core: Fix platform-device id collision
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git://people.freedesktop.org/~gabbayo/linux into drm-fixes
- Remove the interrupt SW ring buffer impl. as it is not used by any module
in amdkfd.
- Fix a sparse warning
* tag 'drm-amdkfd-fixes-2015-01-13' of git://people.freedesktop.org/~gabbayo/linux:
drm/amdkfd: Fix sparse warning (different address space)
drm/amdkfd: Drop interrupt SW ring buffer
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git://anongit.freedesktop.org/drm-intel into drm-fixes
misc i915 fixes
* tag 'drm-intel-fixes-2015-01-15' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES
drm/i915: Ban Haswell from using RCS flips
drm/i915: vlv: sanitize RPS interrupt mask during GPU idling
drm/i915: fix HW lockup due to missing RPS IRQ workaround on GEN6
drm/i915: gen9: fix RPS interrupt routing to CPU vs. GT
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There are still some places in the fb helper that need to avoid
sleeping in panic context. Here's an example:
[ 65.615496] bad: scheduling from the idle thread!
[ 65.620747] CPU: 92 PID: 0 Comm: swapper/92 Tainted: G M E 3.18.0-rc4-7-default+ #20
[ 65.630364] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS
BRHSXSD1.86B.0056.R01.1409242327 09/24/2014
[ 65.641923] ffff88087f693d80 ffff88087f689878 ffffffff81566db9 0000000000000000
[ 65.650226] ffff88087f693d80 ffff88087f689898 ffffffff810871ff ffff88046eb3e0d0
[ 65.658527] ffff88087f693d80 ffff88087f6898c8 ffffffff8107c1fa 000000017f6898b8
[ 65.666830] Call Trace:
[ 65.669557] <#MC> [<ffffffff81566db9>] dump_stack+0x46/0x58
[ 65.675994] [<ffffffff810871ff>] dequeue_task_idle+0x2f/0x40
[ 65.682412] [<ffffffff8107c1fa>] dequeue_task+0x5a/0x80
[ 65.688345] [<ffffffff810804f3>] deactivate_task+0x23/0x30
[ 65.694569] [<ffffffff81569050>] __schedule+0x580/0x7f0
[ 65.700502] [<ffffffff81569739>] schedule_preempt_disabled+0x29/0x70
[ 65.707696] [<ffffffff8156abb6>] __ww_mutex_lock_slowpath+0xb8/0x162
[ 65.714891] [<ffffffff8156acb3>] __ww_mutex_lock+0x53/0x85
[ 65.721125] [<ffffffffa00b3a5d>] drm_modeset_lock+0x3d/0x110 [drm]
[ 65.728132] [<ffffffffa00b3c2a>] __drm_modeset_lock_all+0x8a/0x120 [drm]
[ 65.735721] [<ffffffffa00b3cd0>] drm_modeset_lock_all+0x10/0x30 [drm]
[ 65.743015] [<ffffffffa01af8bf>] drm_fb_helper_pan_display+0x2f/0xf0 [drm_kms_helper]
[ 65.751857] [<ffffffff8132bd21>] fb_pan_display+0xd1/0x1a0
[ 65.758081] [<ffffffff81326010>] bit_update_start+0x20/0x50
[ 65.764400] [<ffffffff813259f2>] fbcon_switch+0x3a2/0x550
[ 65.770528] [<ffffffff813a01c9>] redraw_screen+0x189/0x240
[ 65.776750] [<ffffffff81322f8a>] fbcon_blank+0x20a/0x2d0
[ 65.782778] [<ffffffff8137d359>] ? erst_writer+0x209/0x330
[ 65.789002] [<ffffffff810ba2f3>] ? internal_add_timer+0x63/0x80
[ 65.795710] [<ffffffff810bc137>] ? mod_timer+0x127/0x1e0
[ 65.801740] [<ffffffff813a0cd8>] do_unblank_screen+0xa8/0x1d0
[ 65.808255] [<ffffffff813a0e10>] unblank_screen+0x10/0x20
[ 65.814381] [<ffffffff812ca0d9>] bust_spinlocks+0x19/0x40
[ 65.820508] [<ffffffff81561ca7>] panic+0x106/0x1f5
[ 65.825955] [<ffffffff8102336c>] mce_panic+0x2ac/0x2e0
[ 65.831789] [<ffffffff812c796a>] ? delay_tsc+0x4a/0x80
[ 65.837625] [<ffffffff81024e1f>] do_machine_check+0xbaf/0xbf0
[ 65.844138] [<ffffffff813365d7>] ? intel_idle+0xc7/0x150
[ 65.850166] [<ffffffff8156f03f>] machine_check+0x1f/0x30
[ 65.856195] [<ffffffff813365d7>] ? intel_idle+0xc7/0x150
[ 65.862222] <<EOE>> [<ffffffff814283d5>] cpuidle_enter_state+0x55/0x170
[ 65.869823] [<ffffffff814285a7>] cpuidle_enter+0x17/0x20
[ 65.875852] [<ffffffff81097b08>] cpu_startup_entry+0x2d8/0x370
[ 65.882467] [<ffffffff8102fe29>] start_secondary+0x159/0x180
There's __drm_modeset_lock_all() which Daniel Vetter introduced for this
purpose. We can leverage that without reinventing anything. This patch
works with the latest kernel.
Reviewed-by: Rob Clark <robdclark@gmail.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
This pull request includes below fixups,
- Remove duplicated machine checking.
. It seems that this code was added when you merged 'v3.18-rc7' into
drm-next. commit id : e8115e79aa62b6ebdb3e8e61ca4092cc32938afc
- Fix hdmiphy reset.
. Exynos hdmi has two interfaces to control hdmyphy, one is I2C, other
is APB bus - memory mapped I/O. So this patch makes hdmiphy reset
to be done according to interfaces, I2C or APB bus.
- And add some exception codes.
* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: fix warning of vblank reference count
drm/exynos: remove unnecessary runtime pm operations
drm/exynos: fix reset codes for memory mapped hdmi phy
drm/exynos: remove the redundant machine checking code
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into drm-fixes
Some radeon fixes for 3.19:
- GPUVM stability fixes
- SI dpm quirks
- Regression fixes
* 'drm-fixes-3.19' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: use rv515_ring_start on r5xx
drm/radeon: add si dpm quirk list
drm/radeon: don't print error on -ERESTARTSYS
drm/radeon: add a dpm quirk list
drm/radeon: fix VM flush on CIK (v3)
drm/radeon: fix VM flush on SI (v3)
drm/radeon: fix VM flush on cayman/aruba (v3)
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
- Bartlomiej will be co-maintaining PATA portion of libata. git
workflow will stay the same.
- sata_sil24 wasn't happy with tag ordered submission. An option to
restore the old tag allocation behavior is implemented for sil24.
- a very old race condition in PIO host state machine which can trigger
BUG fixed.
- other driver-specific changes
* 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: prevent HSM state change race between ISR and PIO
libata: allow sata_sil24 to opt-out of tag ordered submission
ata: pata_at91: depend on !ARCH_MULTIPLATFORM
ahci: Remove Device ID for Intel Sunrise Point PCH
ahci: Use dev_info() to inform about the lack of Device Sleep support
libata: Whitelist SSDs that are known to properly return zeroes after TRIM
sata_dwc_460ex: fix resource leak on error path
ata: add MAINTAINERS entry for libata PATA drivers
libata: clean up MAINTAINERS entries
libata: export ata_get_cmd_descript()
ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.
ahci_xgene: Fix the endianess issue in APM X-Gene SoC AHCI SATA controller driver.
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sd_set_power_mode() in derived module drivers/mmc/host/rtsx_usb_sdmmc.c
acquires dev_mutex and then calls pm_runtime_get_sync() to make sure the
device is awake while initializing a newly inserted card. Once it is
called during suspending state and explicitly before rtsx_usb_suspend()
acquires the same dev_mutex, both routine deadlock and further hang the
driver because pm_runtime_get_sync() waits the pending PM operations.
Fix this by using an empty suspend method. mmc_core always turns the
LED off after a request is done and thus it is ok to remove the only
rtsx_usb_turn_off_led() here.
Cc: <stable@vger.kernel.org> # v3.16+
Fixes: 730876be2566 ("mfd: Add realtek USB card reader driver")
Signed-off-by: Roger Tseng <rogerable@realtek.com>
[Lee: Removed newly unused variable]
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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If we don't tell regmap-irq that our first status
register is at offset 1, it will try to read offset
zero, which is the chipid register.
Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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STATUS register can be modified by the HW, so we
should bypass cache because of that.
In the case of INT[12] registers, they are the ones
that actually clear the IRQ source at the time they
are read. If we rely on the cache for them, we will
never be able to clear the interrupt, which will cause
our IRQ line to be disabled due to IRQ throttling.
Fixes: 44b4dc6 mfd: tps65218: Add driver for the TPS65218 PMIC
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Allow multiple DA9052 regulators be registered by registering with
PLATFORM_DEVID_AUTO instead of PLATFORM_DEVID_NONE.
The subdevices are currently registered with PLATFORM_DEVID_NONE, which
will cause a name collision on the platform bus when multiple regulators
are registered:
[ 0.128855] da9052-regulator da9052-regulator: invalid regulator ID specified
[ 0.128973] da9052-regulator: probe of da9052-regulator failed with error -22
[ 0.129148] ------------[ cut here ]------------
[ 0.129200] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5c/0x7c()
[ 0.129233] sysfs: cannot create duplicate filename '/devices/platform/soc/60000000.aips/63fc8000.i2c/i2c-0/0-0048/da9052-regulator
...
[ 0.132891] ------------[ cut here ]------------
[ 0.132924] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x24c/0x2cc()
[ 0.132957] kobject_add_internal failed for da9052-regulator with -EEXIST, don't try to register things with the same name in the same directory.
...
[ 0.137000] da9052 0-0048: mfd_add_devices failed: -17
[ 0.138486] da9052: probe of 0-0048 failed with error -17
Based on the fix done by Johan Hovold at commit b6684228726cc255 ("mfd:
viperboard: Fix platform-device id collision").
Tested on a imx53-qsb board, where multiple DA9053 regulators can be
successfully probed.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Here is a (hopefully final) slew of pin control fixes for the v3.19
series. The deadlock fix is kind of serious and tagged for stable,
the rest is business as usual.
- Fix two deadlocks around the pin control mutexes, a long-standing
issue that manifest itself in plug/unplug of pin controllers.
(Tagged for stable.)
- Handle an error path with zero functions in the Qualcomm pin
controller.
- Drop a bogus second GPIO chip added in the Lantiq driver.
- Fix sudden IRQ loss on Rockchip pin controllers.
- Register the GIT tree in MAINTAINERS"
* tag 'pinctrl-v3.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: MAINTAINERS: add git tree reference
pinctrl: qcom: Don't iterate past end of function array
pinctrl: lantiq: remove bogus of_gpio_chip_add
pinctrl: Fix two deadlocks
pinctrl: rockchip: Avoid losing interrupts when supporting both edges
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Pull networking fixes from David Miller:
1) Socket addresses returned in the error queue need to be fully
initialized before being passed on to userspace, fix from Willem de
Bruijn.
2) Interrupt handling fixes to davinci_emac driver from Tony Lindgren.
3) Fix races between receive packet steering and cpu hotplug, from Eric
Dumazet.
4) Allowing netlink sockets to subscribe to unknown multicast groups
leads to crashes, don't allow it. From Johannes Berg.
5) One to many socket races in SCTP fixed by Daniel Borkmann.
6) Put in a guard against the mis-use of ipv6 atomic fragments, from
Hagen Paul Pfeifer.
7) Fix promisc mode and ethtool crashes in sh_eth driver, from Ben
Hutchings.
8) NULL deref and double kfree fix in sxgbe driver from Girish K.S and
Byungho An.
9) cfg80211 deadlock fix from Arik Nemtsov.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
s2io: use snprintf() as a safety feature
r8152: remove sram_read
r8152: remove generic_ocp_read before writing
bgmac: activate irqs only if there is nothing to poll
bgmac: register napi before the device
sh_eth: Fix ethtool operation crash when net device is down
sh_eth: Fix promiscuous mode on chips without TSU
ipv6: stop sending PTB packets for MTU < 1280
net: sctp: fix race for one-to-many sockets in sendmsg's auto associate
genetlink: synchronize socket closing and family removal
genetlink: disallow subscribing to unknown mcast groups
genetlink: document parallel_ops
net: rps: fix cpu unplug
net: davinci_emac: Add support for emac on dm816x
net: davinci_emac: Fix ioremap for devices with MDIO within the EMAC address space
net: davinci_emac: Fix incomplete code for getting the phy from device tree
net: davinci_emac: Free clock after checking the frequency
net: davinci_emac: Fix runtime pm calls for davinci_emac
net: davinci_emac: Fix hangs with interrupts
ip: zero sockaddr returned on error queue
...
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"sp->desc[i]" has 25 characters. "dev->name" has 15 characters. If we
used all 15 characters then the sprintf() would overflow.
I changed the "sprintf(sp->name, "%s Neterion %s"" to snprintf(), as
well, even though it can't overflow just to be consistent.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Read OCP register 0xa43a~0xa43b would clear some flags which the hw
would use, and it may let the device lost. However, the unit of
reading is 4 bytes. That is, it would read 0xa438~0xa43b when calling
sram_read() to read OCP_SRAM_DATA.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For ocp_write_word() and ocp_write_byte(), there is a generic_ocp_read()
which is used to read the whole 4 byte data, keep the unchanged bytes,
and modify the expected bytes. However, the "byen" could be used to
determine which bytes of the 4 bytes to write, so the action could be
removed.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IRQs should only get activated when there is nothing to poll in the
queue any more and to after every poll.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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napi should get registered before the netdev and not after.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The driver connects and disconnects the PHY device whenever the
net device is brought up and down. The ethtool get_settings,
set_settings and nway_reset operations will dereference a null
or dangling pointer if called while it is down.
I think it would be preferable to keep the PHY connected, but there
may be good reasons not to.
As an immediate fix for this bug:
- Set the phydev pointer to NULL after disconnecting the PHY
- Change those three operations to return -ENODEV while the PHY is
not connected
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently net_device_ops::set_rx_mode is only implemented for
chips with a TSU (multiple address table). However we do need
to turn the PRM (promiscuous) flag on and off for other chips.
- Remove the unlikely() from the TSU functions that we may safely
call for chips without a TSU
- Make setting of the MCT flag conditional on the tsu capability flag
- Rename sh_eth_set_multicast_list() to sh_eth_set_rx_mode() and plumb
it into both net_device_ops structures
- Remove the previously-unreachable branch in sh_eth_rx_mode() that
would otherwise reset the flags to defaults for non-TSU chips
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It is possible for ata_sff_flush_pio_task() to set ap->hsm_task_state to
HSM_ST_IDLE in between the time __ata_sff_port_intr() checks for HSM_ST_IDLE
and before it calls ata_sff_hsm_move() causing ata_sff_hsm_move() to BUG().
This problem is hard to reproduce making this patch hard to verify, but this
fix will prevent the race.
I have not been able to reproduce the problem, but here is a crash dump from
a 2.6.32 kernel.
On examining the ata port's state, its hsm_task_state field has a value of HSM_ST_IDLE:
crash> struct ata_port.hsm_task_state ffff881c1121c000
hsm_task_state = 0
Normally, this should not be possible as ata_sff_hsm_move() was called from ata_sff_host_intr(),
which checks hsm_task_state and won't call ata_sff_hsm_move() if it has a HSM_ST_IDLE value.
PID: 11053 TASK: ffff8816e846cae0 CPU: 0 COMMAND: "sshd"
#0 [ffff88008ba03960] machine_kexec at ffffffff81038f3b
#1 [ffff88008ba039c0] crash_kexec at ffffffff810c5d92
#2 [ffff88008ba03a90] oops_end at ffffffff8152b510
#3 [ffff88008ba03ac0] die at ffffffff81010e0b
#4 [ffff88008ba03af0] do_trap at ffffffff8152ad74
#5 [ffff88008ba03b50] do_invalid_op at ffffffff8100cf95
#6 [ffff88008ba03bf0] invalid_op at ffffffff8100bf9b
[exception RIP: ata_sff_hsm_move+317]
RIP: ffffffff813a77ad RSP: ffff88008ba03ca0 RFLAGS: 00010097
RAX: 0000000000000000 RBX: ffff881c1121dc60 RCX: 0000000000000000
RDX: ffff881c1121dd10 RSI: ffff881c1121dc60 RDI: ffff881c1121c000
RBP: ffff88008ba03d00 R8: 0000000000000000 R9: 000000000000002e
R10: 000000000001003f R11: 000000000000009b R12: ffff881c1121c000
R13: 0000000000000000 R14: 0000000000000050 R15: ffff881c1121dd78
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffff88008ba03d08] ata_sff_host_intr at ffffffff813a7fbd
#8 [ffff88008ba03d38] ata_sff_interrupt at ffffffff813a821e
#9 [ffff88008ba03d78] handle_IRQ_event at ffffffff810e6ec0
--- <IRQ stack> ---
[exception RIP: pipe_poll+48]
RIP: ffffffff81192780 RSP: ffff880f26d459b8 RFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff880f26d459c8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff881a0539fa80
RBP: ffffffff8100bb8e R8: ffff8803b23324a0 R9: 0000000000000000
R10: ffff880f26d45dd0 R11: 0000000000000008 R12: ffffffff8109b646
R13: ffff880f26d45948 R14: 0000000000000246 R15: 0000000000000246
ORIG_RAX: ffffffffffffff10 CS: 0010 SS: 0018
RIP: 00007f26017435c3 RSP: 00007fffe020c420 RFLAGS: 00000206
RAX: 0000000000000017 RBX: ffffffff8100b072 RCX: 00007fffe020c45c
RDX: 00007f2604a3f120 RSI: 00007f2604a3f140 RDI: 000000000000000d
RBP: 0000000000000000 R8: 00007fffe020e570 R9: 0101010101010101
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe020e5f0
R13: 00007fffe020e5f4 R14: 00007f26045f373c R15: 00007fffe020e5e0
ORIG_RAX: 0000000000000017 CS: 0033 SS: 002b
Somewhere between the ata_sff_hsm_move() check and the ata_sff_host_intr() check, the value changed.
On examining the other cpus to see what else was running, another cpu was running the error handler
routines:
PID: 326 TASK: ffff881c11014aa0 CPU: 1 COMMAND: "scsi_eh_1"
#0 [ffff88008ba27e90] crash_nmi_callback at ffffffff8102fee6
#1 [ffff88008ba27ea0] notifier_call_chain at ffffffff8152d515
#2 [ffff88008ba27ee0] atomic_notifier_call_chain at ffffffff8152d57a
#3 [ffff88008ba27ef0] notify_die at ffffffff810a154e
#4 [ffff88008ba27f20] do_nmi at ffffffff8152b1db
#5 [ffff88008ba27f50] nmi at ffffffff8152aaa0
[exception RIP: _spin_lock_irqsave+47]
RIP: ffffffff8152a1ff RSP: ffff881c11a73aa0 RFLAGS: 00000006
RAX: 0000000000000001 RBX: ffff881c1121deb8 RCX: 0000000000000000
RDX: 0000000000000246 RSI: 0000000000000020 RDI: ffff881c122612d8
RBP: ffff881c11a73aa0 R8: ffff881c17083800 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff881c1121c000
R13: 000000000000001f R14: ffff881c1121dd50 R15: ffff881c1121dc60
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000
--- <NMI exception stack> ---
#6 [ffff881c11a73aa0] _spin_lock_irqsave at ffffffff8152a1ff
#7 [ffff881c11a73aa8] ata_exec_internal_sg at ffffffff81396fb5
#8 [ffff881c11a73b58] ata_exec_internal at ffffffff81397109
#9 [ffff881c11a73bd8] atapi_eh_request_sense at ffffffff813a34eb
Before it tried to acquire a spinlock, ata_exec_internal_sg() called ata_sff_flush_pio_task().
This function will set ap->hsm_task_state to HSM_ST_IDLE, and has no locking around setting this
value. ata_sff_flush_pio_task() can then race with the interrupt handler and potentially set
HSM_ST_IDLE at a fatal moment, which will trigger a kernel BUG.
v2: Fixup comment in ata_sff_flush_pio_task()
tj: Further updated comment. Use ap->lock instead of shost lock and
use the [un]lock_irq variant instead of the irqsave/restore one.
Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
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Ronny reports: https://bugzilla.kernel.org/show_bug.cgi?id=87101
"Since commit 8a4aeec8d "libata/ahci: accommodate tag ordered
controllers" the access to the harddisk on the first SATA-port is
failing on its first access. The access to the harddisk on the
second port is working normal.
When reverting the above commit, access to both harddisks is working
fine again."
Maintain tag ordered submission as the default, but allow sata_sil24 to
continue with the old behavior.
Cc: <stable@vger.kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Reported-by: Ronny Hegewald <Ronny.Hegewald@online.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Timur reports that this code crashes if nfunctions is 0. Fix the
loop iteration to only consider valid elements of the functions
array.
Reported-by: Timur Tabi <timur@codeaurora.org>
Cc: Pramod Gurav <pramod.gurav@smartplayin.com>
Cc: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Cc: Ivan T. Ivanov <iivanov@mm-sol.com>
Cc: Andy Gross <agross@codeaurora.org>
Fixes: 327455817a92 "pinctrl: qcom: Add support for reset for apq8064"
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Here is a set of fixes that mainly appeared when Johan Hovold started
exercising the removal path of the GPIO library, dealing with
hotplugging of GPIO controllers. Details from tag:
A slew of fixes dealing with some irritating bugs (non-regressions)
that have been around forever in the GPIO subsystem, most of them also
tagged for stable:
- A large slew of fixes from Johan Hovold who is finally testing and
reviewing the removal path of the GPIO drivers.
- Fix of_get_named_gpiod_flags() so it works as expected.
- Fix an IRQ handling bug in the crystalcove driver"
* tag 'gpio-v3.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpiolib: of: Correct error handling in of_get_named_gpiod_flags
gpio: sysfs: fix gpio attribute-creation race
gpio: sysfs: fix gpio device-attribute leak
gpio: sysfs: fix gpio-chip device-attribute leak
gpio: unregister gpiochip device before removing it
gpio: fix sleep-while-atomic in gpiochip_remove
gpio: fix memory leak and sleep-while-atomic
gpio: clean up gpiochip_add error handling
gpio: fix gpio-chip list corruption
gpio: fix memory and reference leaks in gpiochip_add error path
gpio: crystalcove: use handle_nested_irq
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input subsystem fixes from Dmitry Torokhov.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: uinput - fix ioctl nr overflow for UI_GET_SYSNAME/VERSION
Input: I8042 - add Acer Aspire 7738 to the nomux list
Input: elantech - support new ICs types for version 4
Input: i8042 - reset keyboard to fix Elantech touchpad detection
MAINTAINERS: remove Dmitry Torokhov's alternate address
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Prevented re-enabling the vblank interrupt by drm_vblank_off and
drm_vblank_get from mixer_wait_for_vblank returns error after
drm_vblank_off. We get below warnings without this error handling
because vblank reference count is mismatched by above sequence.
setting mode 1920x1080-60Hz@XR24 on connectors 16, crtc 13
[ 19.900793] ------------[ cut here ]------------
[ 19.903959] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/drm_irq.c:1072 exynos_drm_crtc_finish_pageflip+0xac/0xdc()
[ 19.914076] Modules linked in:
[ 19.917116] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.19.0-rc4-00040-g3d729789-dirty #46
[ 19.925342] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[ 19.931437] [<c0014430>] (unwind_backtrace) from [<c001158c>] (show_stack+0x10/0x14)
[ 19.939131] [<c001158c>] (show_stack) from [<c04cdd50>] (dump_stack+0x84/0xc4)
[ 19.946329] [<c04cdd50>] (dump_stack) from [<c00226f4>] (warn_slowpath_common+0x80/0xb0)
[ 19.954382] [<c00226f4>] (warn_slowpath_common) from [<c00227c0>] (warn_slowpath_null+0x1c/0x24)
[ 19.963132] [<c00227c0>] (warn_slowpath_null) from [<c02c20cc>] (exynos_drm_crtc_finish_pageflip+0xac/0xdc)
[ 19.972841] [<c02c20cc>] (exynos_drm_crtc_finish_pageflip) from [<c02cb7ec>] (mixer_irq_handler+0xdc/0x104)
[ 19.982546] [<c02cb7ec>] (mixer_irq_handler) from [<c005c904>] (handle_irq_event_percpu+0x78/0x134)
[ 19.991555] [<c005c904>] (handle_irq_event_percpu) from [<c005c9fc>] (handle_irq_event+0x3c/0x5c)
[ 20.000395] [<c005c9fc>] (handle_irq_event) from [<c005f384>] (handle_fasteoi_irq+0xe0/0x1ac)
[ 20.008885] [<c005f384>] (handle_fasteoi_irq) from [<c005bf88>] (generic_handle_irq+0x2c/0x3c)
[ 20.017463] [<c005bf88>] (generic_handle_irq) from [<c005c254>] (__handle_domain_irq+0x7c/0xec)
[ 20.026128] [<c005c254>] (__handle_domain_irq) from [<c0008698>] (gic_handle_irq+0x30/0x68)
[ 20.034449] [<c0008698>] (gic_handle_irq) from [<c00120c0>] (__irq_svc+0x40/0x74)
[ 20.041893] Exception stack(0xc06fff68 to 0xc06fffb0)
[ 20.046923] ff60: 00000000 00000000 000052f6 c001b460 c06fe000 c07064e8
[ 20.055070] ff80: c04d743c c07392a2 c0739440 c06da340 ef7fca80 00000000 01000000 c06fffb0
[ 20.063212] ffa0: c000f24c c000f250 60000013 ffffffff
[ 20.068245] [<c00120c0>] (__irq_svc) from [<c000f250>] (arch_cpu_idle+0x38/0x3c)
[ 20.075611] [<c000f250>] (arch_cpu_idle) from [<c0050948>] (cpu_startup_entry+0x108/0x16c)
[ 20.083846] [<c0050948>] (cpu_startup_entry) from [<c06aec5c>] (start_kernel+0x3a0/0x3ac)
[ 20.091980] ---[ end trace 2c76ee0500489d1b ]---
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
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In booting, we can see a below message.
[ 3.241728] exynos-mixer 14450000.mixer: Unbalanced pm_runtime_enable!
Already pm_runtime_enable is called by probe function. Remove
pm_runtime_enable/disable from mixer_bind and mixer_unbind.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
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This fixes reset codes to support memory mapped hdmi phy as well as hdmi
phy dedicated i2c lines.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"We've been sitting on our fixes branch for a while, so this batch is
unfortunately on the large side.
A lot of these are tweaks and fixes to device trees, fixing various
bugs around clocks, reg ranges, etc. There's also a few defconfig
updates (which are on the late side, no more of those).
All in all the diffstat is bigger than ideal at this time, but nothing
in here seems particularly risky"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (31 commits)
reset: sunxi: fix spinlock initialization
ARM: dts: disable CCI on exynos5420 based arndale-octa
drivers: bus: check cci device tree node status
ARM: rockchip: disable jtag/sdmmc autoswitching on rk3288
ARM: nomadik: fix up leftover device tree pins
ARM: at91: board-dt-sama5: add phy_fixup to override NAND_Tree
ARM: at91/dt: sam9263: Add missing clocks to lcdc node
ARM: at91: sama5d3: dt: correct the sound route
ARM: at91/dt: sama5d4: fix the timer reg length
ARM: exynos_defconfig: Enable LM90 driver
ARM: exynos_defconfig: Enable options for display panel support
arm: dts: Use pmu_system_controller phandle for dp phy
ARM: shmobile: sh73a0 legacy: Set .control_parent for all irqpin instances
ARM: dts: berlin: correct BG2Q's SM GPIO location.
ARM: dts: berlin: add broken-cd and set bus width for eMMC in Marvell DMP DT
ARM: dts: berlin: fix io clk and add missing core clk for BG2Q sdhci2 host
ARM: dts: Revert disabling of smc91x for n900
ARM: dts: imx51-babbage: Fix ULPI PHY reset modelling
ARM: dts: dra7-evm: fix qspi device tree partition size
ARM: omap2plus_defconfig: use CONFIG_CPUFREQ_DT
...
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git://git.linaro.org/people/mike.turquette/linux
Pull clock driver fixes from Mike Turquette:
"Small number of fixes for clock drivers and a single null pointer
dereference fix in the framework core code.
The driver fixes vary from fixing section mismatch warnings to
preventing machines from hanging (and preventing developers from
crying)"
* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux:
clk: fix possible null pointer dereference
Revert "clk: ppc-corenet: Fix Section mismatch warning"
clk: rockchip: fix deadlock possibility in cpuclk
clk: berlin: bg2q: remove non-exist "smemc" gate clock
clk: at91: keep slow clk enabled to prevent system hang
clk: rockchip: fix rk3288 cpuclk core dividers
clk: rockchip: fix rk3066 pll lock bit location
clk: rockchip: Fix clock gate for rk3188 hclk_emem_peri
clk: rockchip: add CLK_IGNORE_UNUSED flag to fix rk3066/rk3188 USB Host
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is one fix for a Multiqueue sleeping in invalid context problem
and a MAINTAINER file update for Qlogic"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ->queue_rq can't sleep
MAINTAINERS: Update maintainer list for qla4xxx
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The commit 646cafc6 (clk: Change clk_ops->determine_rate to
return a clk_hw as the best parent) opens a possibility for
null pointer dereference, fix this.
Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
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This reverts commit da788acb28386aa896224e784954bb73c99ff26c.
That commit tried to fix the section mismatch warning by moving the
ppc_corenet_clk_driver struct to init section. This is definitely wrong
because the kernel would free the memories occupied by this struct
after boot while this driver is still registered in the driver core.
The kernel would panic when accessing this driver struct.
Cc: stable@vger.kernel.org # 3.17
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
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Lockdep reported a possible deadlock between the cpuclk lock and for example
the i2c driver.
CPU0 CPU1
---- ----
lock(clk_lock);
local_irq_disable();
lock(&(&i2c->lock)->rlock);
lock(clk_lock);
<Interrupt>
lock(&(&i2c->lock)->rlock);
*** DEADLOCK ***
The generic clock-types of the core ccf already use spin_lock_irqsave when
touching clock registers, so do the same for the cpuclk.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[mturquette@linaro.org: removed initialization of "flags"]
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Pull dmaengine fixes from Vinod Koul:
"Two patches, the first by Andy to fix dw dmac runtime pm and second
one by me to fix the dmaengine headers in MAINTAINERS"
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: dw: balance PM runtime calls
MAINTAINERS: dmaengine: fix the header file for dmaengine
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Call spin_lock_init() before the spinlocks are used, both in early init
and probe functions preventing a lockdep splat.
I have been observing lockdep complaining [1] during boot on my a80 optimus [2]
when CONFIG_PROVE_LOCKING has been enabled. This patch resolves the splat,
and has been tested on a few other sunxi platforms without issue.
[1] http://storage.kernelci.org/next/next-20150107/arm-multi_v7_defconfig+CONFIG_PROVE_LOCKING=y/lab-tbaker/boot-sun9i-a80-optimus.html
[2] http://kernelci.org/boot/?a80-optimus
Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Cc: <stable@vger.kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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The arm-cci driver completes the probe sequence even if the cci node is
marked as disabled. Add a check in the driver to honour the cci status
in the device tree.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are three small driver fixes for reported issues for 3.19-rc5.
All of these have been in linux-next for a while with no reported
problems"
* tag 'char-misc-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
mcb: mcb-pci: Only remap the 1st 0x200 bytes of BAR 0
mei: add ABI documentation for fw_status exported through sysfs
mei: clean reset bit before reset
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some tty and serial driver fixes for 3.19-rc5 that resolve
some reported issues, and add a new device id to the 8250 serial port
driver.
All have been in linux-next with no reported problems"
* tag 'tty-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: samsung: Add the support for Exynos5433 SoC
Revert "tty: Fix pty master poll() after slave closes v2"
tty: Prevent hw state corruption in exclusive mode reopen
tty: Add support for the WCH384 4S multi-IO card
serial: fix parisc boot hang
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are 6 staging driver fixes for 3.19-rc5.
They fix some reported issues with some IIO drivers, as well as some
issues with the vt6655 wireless driver.
All have been in linux-next for a while"
* tag 'staging-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: vt6655: fix sparse warning: argument type
staging: vt6655: Fix loss of distant/weak access points on channel change.
staging: vt6655: vnt_tx_packet Fix corrupted tx packets.
staging: vt6655: fix sparse warnings: incorrect argument type
iio: iio: Fix iio_channel_read return if channel havn't info
iio: ad799x: Fix ad7991/ad7995/ad7999 config setup
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here is a bunch of USB fixes for 3.19-rc5.
Most of these are gadget driver fixes, along with the xhci driver fix
that we both reported having problems with, as well as some new device
ids and other tiny fixes.
All have been in linux-next with no problems"
* tag 'usb-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (43 commits)
usb: dwc3: gadget: Stop TRB preparation after limit is reached
usb: dwc3: gadget: Fix TRB preparation during SG
usb: phy: mv-usb: fix usb_phy build errors
usb: serial: handle -ENODEV quietly in generic_submit_read_urb
usb: serial: silence all non-critical read errors
USB: console: fix potential use after free
USB: console: fix uninitialised ldisc semaphore
usb: gadget: udc: atmel: fix possible oops when unloading module
usb: gadget: gadgetfs: fix an oops in ep_write()
usb: phy: Fix deferred probing
OHCI: add a quirk for ULi M5237 blocking on reset
uas: Add US_FL_NO_ATA_1X for 2 more Seagate disk enclosures
uas: Do not blacklist ASM1153 disk enclosures
usb: gadget: udc: avoid dereference before NULL check in ep_queue
usb: host: ehci-tegra: request deferred probe when failing to get phy
uas: disable UAS on Apricorn SATA dongles
uas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS566 with usb-id 0bc2:a013
uas: Add US_FL_NO_ATA_1X for Seagate devices with usb-id 0bc2:a013
xhci: Add broken-streams quirk for Fresco Logic FL1000G xhci controllers
USB: EHCI: adjust error return code
...
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On dm816x we have two emac controllers with separate memory
areas.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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space
Some devices like dm816x have the MDIO registers within the first EMAC
instance address space. Let's fix the issue by allowing to pass an
optional second IO range for the EMAC control register area.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Looks like the phy_id is never set up beyond getting the phandle.
Note that we can remove the ifdef for phy_node as there is a stub
for of_phy_connec() if CONFIG_OF is not set.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We only use clk_get() to get the frequency, the rest is done by
the runtime PM calls. Let's free the clock too.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 3ba97381343b ("net: ethernet: davinci_emac: add pm_runtime support")
added support for runtime PM, but it causes issues on omap3 related devices
that actually gate the clocks:
Unhandled fault: external abort on non-linefetch (0x1008)
...
[<c04160f0>] (emac_dev_getnetstats) from [<c04d6a3c>] (dev_get_stats+0x78/0xc8)
[<c04d6a3c>] (dev_get_stats) from [<c04e9ccc>] (rtnl_fill_ifinfo+0x3b8/0x938)
[<c04e9ccc>] (rtnl_fill_ifinfo) from [<c04eade4>] (rtmsg_ifinfo+0x68/0xd8)
[<c04eade4>] (rtmsg_ifinfo) from [<c04dd35c>] (register_netdevice+0x3a0/0x4ec)
[<c04dd35c>] (register_netdevice) from [<c04dd4bc>] (register_netdev+0x14/0x24)
[<c04dd4bc>] (register_netdev) from [<c041755c>] (davinci_emac_probe+0x408/0x5c8)
[<c041755c>] (davinci_emac_probe) from [<c0396d78>] (platform_drv_probe+0x48/0xa4)
Let's fix it by moving the pm_runtime_get() call earlier, and also add it to
the emac_dev_getnetstats(). Also note that we want to use pm_runtime_get_sync()
as we don't want to have deferred_resume happen. And let's also check the
return value for pm_runtime_get_sync() as noted by Felipe Balbi <balbi@ti.com>.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Acked-by: Mark A. Greer <mgreer@animalcreek.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On davinci_emac, we have pulse interrupts. This means that we need to
clear the EOI bits when disabling interrupts as otherwise the interrupts
keep happening. And we also need to not clear the EOI bits again when
enabling the interrupts as otherwise we will get tons of:
unexpected IRQ trap at vector 00
These errors almost certainly mean that the omap-intc.c is signaling
a spurious interrupt with the reserved irq 127 as we've seen earlier
on omap3.
Let's fix the issue by clearing the EOI bits when disabling the
interrupts. Let's also keep the comment for "Rx Threshold and Misc
interrupts are not enabled" for both enable and disable so people
are aware of this when potentially adding more support.
Note that eventually we should handle the RX and TX interrupts
separately like cpsw is now doing. However, so far I have not seen
any issues with this based on my testing, so it seems to behave a
little different compared to the cpsw that had a similar issue.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux
Pull fbdev fixes from Tomi Valkeinen:
- broadsheetfb: fix memory leak
- simplefb: fix build failure on sparc
* tag 'fbdev-fixes-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
fbdev/broadsheetfb: fix memory leak
simplefb: Fix build failure on Sparc
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Pull MMC bugfix from Ulf Hansson:
"Fix sdhci regulator regression for Qualcomm and Nvidia boards"
* tag 'mmc-v3.19-4' of git://git.linaro.org/people/ulf.hansson/mmc:
mmc: sdhci: Set SDHCI_POWER_ON with external vmmc
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