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2012-02-23Merge commit 'v3.2.7' into rt-3.2.7-rt13v3.2.7-rt13Clark Williams
2012-02-20mmc: dw_mmc: Fix PIO mode with support of highmemSeungwon Jeon
commit f9c2a0dc42a6938ff2a80e55ca2bbd1d5581c72e upstream. Current PIO mode makes a kernel crash with CONFIG_HIGHMEM. Highmem pages have a NULL from sg_virt(sg). This patch fixes the following problem. Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c0004000 [00000000] *pgd=00000000 Internal error: Oops: 817 [#1] PREEMPT SMP Modules linked in: CPU: 0 Not tainted (3.0.15-01423-gdbf465f #589) PC is at dw_mci_pull_data32+0x4c/0x9c LR is at dw_mci_read_data_pio+0x54/0x1f0 pc : [<c0358824>] lr : [<c035988c>] psr: 20000193 sp : c0619d48 ip : c0619d70 fp : c0619d6c r10: 00000000 r9 : 00000002 r8 : 00001000 r7 : 00000200 r6 : 00000000 r5 : e1dd3100 r4 : 00000000 r3 : 65622023 r2 : 0000007f r1 : eeb96000 r0 : e1dd3100 Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment xkernel Control: 10c5387d Table: 61e2004a DAC: 00000015 Process swapper (pid: 0, stack limit = 0xc06182f0) Stack: (0xc0619d48 to 0xc061a000) 9d40: e1dd3100 e1a4f000 00000000 e1dd3100 e1a4f000 00000200 9d60: c0619da4 c0619d70 c035988c c03587e4 c0619d9c e18158f4 e1dd3100 e1dd3100 9d80: 00000020 00000000 00000000 00000020 c06e8a84 00000000 c0619e04 c0619da8 9da0: c0359b24 c0359844 e18158f4 e1dd3164 e1dd3168 e1dd3150 3d02fc79 e1dd3154 9dc0: e1dd3178 00000000 00000020 00000000 e1dd3150 00000000 c10dd7e8 e1a84900 9de0: c061e7cc 00000000 00000000 0000008d c06e8a84 c061e780 c0619e4c c0619e08 9e00: c00c4738 c0359a34 3d02fc79 00000000 c0619e4c c05a1698 c05a1670 c05a165c 9e20: c04de8b0 c061e780 c061e7cc e1a84900 ffffed68 0000008d c0618000 00000000 9e40: c0619e6c c0619e50 c00c48b4 c00c46c8 c061e780 c00423ac c061e7cc ffffed68 9e60: c0619e8c c0619e70 c00c7358 c00c487c 0000008d ffffee38 c0618000 ffffed68 9e80: c0619ea4 c0619e90 c00c4258 c00c72b0 c00423ac ffffee38 c0619ecc c0619ea8 9ea0: c004241c c00c4234 ffffffff f8810000 0000006d 00000002 00000001 7fffffff 9ec0: c0619f44 c0619ed0 c0048bc0 c00423c4 220ae7a9 00000000 386f0d30 0005d3a4 9ee0: c00423ac c10dd0b8 c06f2cd8 c0618000 c0594778 c003a674 7fffffff c0619f44 9f00: 386f0d30 c0619f18 c00a6f94 c005be3c 80000013 ffffffff 386f0d30 0005d3a4 9f20: 386f0d30 0005d2d1 c10dd0a8 c10dd0b8 c06f2cd8 c0618000 c0619f74 c0619f48 9f40: c0345858 c005be00 c00a2440 c0618000 c0618000 c00410d8 c06c1944 c00410fc 9f60: c0594778 c003a674 c0619f9c c0619f78 c004a7e8 c03457b4 c0618000 c06c18f8 9f80: 00000000 c0039c70 c06c18d4 c003a674 c0619fb4 c0619fa0 c04ceafc c004a714 9fa0: c06287b4 c06c18f8 c0619ff4 c0619fb8 c0008b68 c04cea68 c0008578 00000000 9fc0: 00000000 c003a674 00000000 10c5387d c0628658 c003aa78 c062f1c4 4000406a 9fe0: 413fc090 00000000 00000000 c0619ff8 40008044 c0008858 00000000 00000000 Backtrace: [<c03587d8>] (dw_mci_pull_data32+0x0/0x9c) from [<c035988c>] (dw_mci_read_data_pio+0x54/0x1f0) r6:00000200 r5:e1a4f000 r4:e1dd3100 [<c0359838>] (dw_mci_read_data_pio+0x0/0x1f0) from [<c0359b24>] (dw_mci_interrupt+0xfc/0x4a4) [<c0359a28>] (dw_mci_interrupt+0x0/0x4a4) from [<c00c4738>] (handle_irq_event_percpu+0x7c/0x1b4) [<c00c46bc>] (handle_irq_event_percpu+0x0/0x1b4) from [<c00c48b4>] (handle_irq_event+0x44/0x64) [<c00c4870>] (handle_irq_event+0x0/0x64) from [<c00c7358>] (handle_fasteoi_irq+0xb4/0x124) r7:ffffed68 r6:c061e7cc r5:c00423ac r4:c061e780 [<c00c72a4>] (handle_fasteoi_irq+0x0/0x124) from [<c00c4258>] (generic_handle_irq+0x30/0x38) r7:ffffed68 r6:c0618000 r5:ffffee38 r4:0000008d [<c00c4228>] (generic_handle_irq+0x0/0x38) from [<c004241c>] (asm_do_IRQ+0x64/0xe0) r5:ffffee38 r4:c00423ac [<c00423b8>] (asm_do_IRQ+0x0/0xe0) from [<c0048bc0>] (__irq_svc+0x80/0x14c) Exception stack(0xc0619ed0 to 0xc0619f18) Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Will Newton <will.newton@imgtec.com> Signed-off-by: Chris Ball <cjb@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20mmc: atmel-mci: save and restore sdioirq when soft reset is performedLudovic Desroches
commit 18ee684b8ab666329e0a0a72d8b70f16fb0e2243 upstream. Sometimes a software reset is needed. Then some registers are saved and restored but the interrupt mask register is missing. It causes issues with sdio devices whose interrupts are masked after reset. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Chris Ball <cjb@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20hwmon: (f75375s) Fix automatic pwm mode setting for F75373 & F75375Nikolaus Schulz
commit 09e87e5c4f9af656af2a8a3afc03487c5d9287c3 upstream. In order to enable temperature mode aka automatic mode for the F75373 and F75375 chips, the two FANx_MODE bits in the fan configuration register need be set to 01, not 10. Signed-off-by: Nikolaus Schulz <mail@microschulz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20net: enable TC35815 for MIPS againAtsushi Nemoto
commit a1728800bed3b93b231d99e97c756f622b9991c2 upstream. 8<---------------------------------------------------------------------- From: Ralf Roesch <ralf.roesch@rw-gmbh.de> Date: Wed, 16 Nov 2011 09:33:50 +0100 Subject: net: enable TC35815 for MIPS again TX493[8,9] MIPS SoCs support 2 Ethernet channels of type TC35815 which are connected to the internal PCI controller. And JMR3927 MIPS board has a TC35815 chip on board. These dependencies were lost on movement to drivers/net/ethernet/toshiba. Signed-off-by: Ralf Roesch <ralf.roesch@rw-gmbh.de> Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20hwmon: (f75375s) Fix bit shifting in f75375_write16Nikolaus Schulz
commit eb2f255b2d360df3f500042a2258dcf2fcbe89a2 upstream. In order to extract the high byte of the 16-bit word, shift the word to the right, not to the left. Signed-off-by: Nikolaus Schulz <mail@microschulz.de> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20ath9k_hw: fix a RTS/CTS timeout regressionFelix Fietkau
commit 55a2bb4a6d5e8c7b324d003e130fd9aaf33be4e6 upstream. commit adb5066 "ath9k_hw: do not apply the 2.4 ghz ack timeout workaround to cts" reduced the hardware CTS timeout to the normal values specified by the standard, but it turns out while it doesn't need the same extra time that it needs for the ACK timeout, it does need more than the value specified in the standard, but only for 2.4 GHz. This patch brings the CTS timeout value in sync with the initialization values, while still allowing adjustment for bigger distances. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Reported-by: Seth Forshee <seth.forshee@canonical.com> Reported-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20ath9k: fix a WEP crypto related regressionFelix Fietkau
commit f88373fa47f3ce6590fdfaa742d0ddacc2ae017f upstream. commit b4a82a0 "ath9k_hw: fix interpretation of the rx KeyMiss flag" fixed the interpretation of the KeyMiss flag for keycache based lookups, however WEP encryption uses a static index, so KeyMiss is always asserted for it, even though frames are decrypted properly. Fix this by clearing the ATH9K_RXERR_KEYMISS flag if no keycache based lookup was performed. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Reported-by: Laurent Bonnans <bonnans.l@gmail.com> Reported-by: Jurica Vukadin <u.ra604@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20ath9k: Fix kernel panic during driver initilizationMohammed Shafi Shajakhan
commit 07445f688218a48bde72316aed9de4fdcc173131 upstream. all works need to be initialized before ieee80211_register_hw to prevent mac80211 call backs such as drv_start, drv_config getting started. otherwise we would queue/cancel works before initializing them and it leads to kernel panic. this issue can be recreated with the following script in Chrome laptops with AR928X cards, with background scan running (or) Network manager is running while true do sudo modprobe -v ath9k sleep 3 sudo modprobe -r ath9k sleep 3 done EIP: [<81040a47>] __cancel_work_timer+0xb8/0xe1 SS:ESP 0068:f6be9d70 ---[ end trace 4f86d6139a9900ef ]--- Registered led device: ath9k-phy0 ieee80211 phy0: Atheros AR9280 Rev:2 mem=0xf88a0000, irq=16 Kernel panic - not syncing: Fatal exception Pid: 456, comm: wpa_supplicant Tainted: G D 3.0.13 #1 Call Trace: [<81379e21>] panic+0x53/0x14a [<81004a30>] oops_end+0x73/0x81 [<81004b53>] die+0x4c/0x55 [<81002710>] do_trap+0x7c/0x83 [<81002855>] ? do_bounds+0x58/0x58 [<810028cc>] do_invalid_op+0x77/0x81 [<81040a47>] ? __cancel_work_timer+0xb8/0xe1 [<810489ec>] ? sched_clock_cpu+0x81/0x11f [<8103f809>] ? wait_on_work+0xe2/0xf7 [<8137f807>] error_code+0x67/0x6c [<810300d8>] ? wait_consider_task+0x4ba/0x84c [<81040a47>] ? __cancel_work_timer+0xb8/0xe1 [<810380c9>] ? try_to_del_timer_sync+0x5f/0x67 [<81040a91>] cancel_work_sync+0xf/0x11 [<f88d7b7c>] ath_set_channel+0x62/0x25c [ath9k] [<f88d67d1>] ? ath9k_tx_last_beacon+0x26a/0x85c [ath9k] [<f88d8899>] ath_radio_disable+0x3f1/0x68e [ath9k] [<f90d0edb>] ieee80211_hw_config+0x111/0x116 [mac80211] [<f90dd95c>] __ieee80211_recalc_idle+0x919/0xa37 [mac80211] [<f90dda76>] __ieee80211_recalc_idle+0xa33/0xa37 [mac80211] [<812dbed8>] __dev_open+0x82/0xab Cc: Gary Morain <gmorain@google.com> Cc: Paul Stewart <pstew@google.com> Cc: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com> Tested-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com> Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20drm/i915: no lvds quirk for AOpen MP45Daniel Vetter
commit e57b6886f555ab57f40a01713304e2053efe51ec upstream. According to a bug report, it doesn't have one. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44263 Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20drm/i915: Force explicit bpp selection for intel_dp_link_requiredKeith Packard
commit c898261c0dad617f0f1080bedc02d507a2fcfb92 upstream. It is never correct to use intel_crtc->bpp in intel_dp_link_required, so instead pass an explicit bpp in to this function. This patch only supports 18bpp and 24bpp modes, which means that 10bpc modes will be computed incorrectly. Fixing that will require more extensive changes, and so must be addressed separately from this bugfix. intel_dp_link_required is called from intel_dp_mode_valid and intel_dp_mode_fixup. * intel_dp_mode_valid is called to list supported modes; in this case, the current crtc values cannot be relevant as the modes in question may never be selected. Thus, using intel_crtc->bpp is never right. * intel_dp_mode_fixup is called during mode setting, but it is run well before ironlake_crtc_mode_set is called to set intel_crtc->bpp, so using intel_crtc-bpp in this path can only ever get a stale value. Cc: Lubos Kolouch <lubos.kolouch@gmail.com> Cc: Adam Jackson <ajax@redhat.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=42263 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44881 Tested-by: Dave Airlie <airlied@redhat.com> Tested-by: camalot@picnicpark.org (Dell Latitude 6510) Tested-by: Roland Dreier <roland@digitalvampire.org> Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20igb: fix vf lookupGreg Rose
commit 0629292117572a60465f38cdedde2f8164c3df0b upstream. Recent addition of code to find already allocated VFs failed to take account that systems with 2 or more multi-port SR-IOV capable controllers might have already enabled VFs. Make sure that the VFs the function is finding are actually subordinate to the particular instance of the adapter that is looking for them and not subordinate to some device that has previously enabled SR-IOV. This is applicable to 3.2+ kernels. Reported-by: David Ahern <daahern@cisco.com> Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Tested-by: Robert E Garrett <robertX.e.garrett@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20ixgbe: fix vf lookupGreg Rose
commit a4b08329c74985e5cc3a44b6d2b2c59444ed8079 upstream. Recent addition of code to find already allocated VFs failed to take account that systems with 2 or more multi-port SR-IOV capable controllers might have already enabled VFs. Make sure that the VFs the function is finding are actually subordinate to the particular instance of the adapter that is looking for them and not subordinate to some device that has previously enabled SR-IOV. This bug exists in 3.2 stable as well as 3.3 release candidates. Reported-by: David Ahern <daahern@cisco.com> Signed-off-by: Greg Rose <gregory.v.rose@intel.com> Tested-by: Robert E Garrett <robertX.e.garrett@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-15kconfig-disable-a-few-options-rt.patchThomas Gleixner
Disable stuff which is known to have issues on RT Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15acpi-gpe-use-wait-simple.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15dm: Make rt awareThomas Gleixner
Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has interrupts legitimately enabled here as we cant deadlock against the irq thread due to the "sleeping spinlocks" conversion. Reported-by: Luis Claudio R. Goncalves <lclaudio@uudg.org> Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15scsi-fcoe-rt-aware.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15sysrq: Allow immediate Magic SysRq output for PREEMPT_RT_FULLFrank Rowand
Add a CONFIG option to allow the output from Magic SysRq to be output immediately, even if this causes large latencies. If PREEMPT_RT_FULL, printk() will not try to acquire the console lock when interrupts or preemption are disabled. If the console lock is not acquired the printk() output will be buffered, but will not be output immediately. Some drivers call into the Magic SysRq code with interrupts or preemption disabled, so the output of Magic SysRq will be buffered instead of printing immediately if this option is not selected. Even with this option selected, Magic SysRq output will be delayed if the attempt to acquire the console lock fails. Signed-off-by: Frank Rowand <frank.rowand@am.sony.com> Link: http://lkml.kernel.org/r/4E7CEF60.5020508@am.sony.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15kgdb/serial: Short term workaroundJason Wessel
On 07/27/2011 04:37 PM, Thomas Gleixner wrote: > - KGDB (not yet disabled) is reportedly unusable on -rt right now due > to missing hacks in the console locking which I dropped on purpose. > To work around this in the short term you can use this patch, in addition to the clocksource watchdog patch that Thomas brewed up. Comments are welcome of course. Ultimately the right solution is to change separation between the console and the HW to have a polled mode + work queue so as not to introduce any kind of latency. Thanks, Jason.
2012-02-15ARM: at91: tclib: Default to tclib timer for RTThomas Gleixner
RT is not too happy about the shared timer interrupt in AT91 devices. Default to tclib timer for RT. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15rt: Improve the serial console PASS_LIMITIngo Molnar
Beyond the warning: drivers/tty/serial/8250.c:1613:6: warning: unused variable ‘pass_counter’ [-Wunused-variable] the solution of just looping infinitely was ugly - up it to 1 million to give it a chance to continue in some really ugly situation. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers-tty-fix-omap-lock-crap.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15serial: 8250: Call flush_to_ldisc when the irq is threadedIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-02-15serial: 8250: Clean up the locking for -rtIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15md: raid5: Make raid5_percpu handling RT awareThomas Gleixner
__raid_run_ops() disables preemption with get_cpu() around the access to the raid5_percpu variables. That causes scheduling while atomic spews on RT. Serialize the access to the percpu data with a lock and keep the code preemptible. Reported-by: Udo van den Heuvel <udovdh@xs4all.nl> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Udo van den Heuvel <udovdh@xs4all.nl>
2012-02-15USB: Fix the mouse problem when copying large amounts of dataWu Zhangjin
When copying large amounts of data between the USB storage devices and the hard disk, the USB mouse will not work, this patch fixes it. [NOTE: This problem have been found in the Loongson family machines, not sure whether it is producible on other platforms] Signed-off-by: Hu Hongbing <huhb@lemote.com> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
2012-02-15drivers: net: gianfar: Make RT awareThomas Gleixner
The adjust_link() disables interrupts before taking the queue locks. On RT those locks are converted to "sleeping" locks and therefor the local_irq_save/restore must be converted to local_irq_save/restore_nort. Reported-by: Xianghua Xiao <xiaoxianghua@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Xianghua Xiao <xiaoxianghua@gmail.com>
2012-02-15drivers/net: vortex fix locking issuesSteven Rostedt
Argh, cut and paste wasn't enough... Use this patch instead. It needs an irq disable. But, believe it or not, on SMP this is actually better. If the irq is shared (as it is in Mark's case), we don't stop the irq of other devices from being handled on another CPU (unfortunately for Mark, he pinned all interrupts to one CPU). Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> drivers/net/ethernet/3com/3c59x.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-02-15drivers/net: fix livelock issuesThomas Gleixner
Preempt-RT runs into a live lock issue with the NETDEV_TX_LOCKED micro optimization. The reason is that the softirq thread is rescheduling itself on that return value. Depending on priorities it starts to monoplize the CPU and livelock on UP systems. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15tty: Do not disable interrupts in put_ldisc on -rtThomas Gleixner
Fixes the following on PREEMPT_RT: BUG: sleeping function called from invalid context at kernel/rtmutex.c:684 in_atomic(): 0, irqs_disabled(): 1, pid: 9116, name: sshd Pid: 9116, comm: sshd Not tainted 2.6.31-rc6-rt2 #6 Call Trace: [<ffffffff81034a4f>] __might_sleep+0xec/0xee [<ffffffff812fbc6d>] rt_spin_lock+0x34/0x75 [ffffffff81064a83>] atomic_dec_and_spin_lock+0x36/0x54 [<ffffffff811df7c7>] put_ldisc+0x57/0xa6 [<ffffffff811dfb87>] tty_ldisc_hangup+0xe7/0x19f [<ffffffff811d9224>] do_tty_hangup+0xff/0x319 [<ffffffff811d9453>] tty_vhangup+0x15/0x17 [<ffffffff811e1263>] pty_close+0x127/0x12b [<ffffffff811dac41>] tty_release_dev+0x1ad/0x4c0 .... Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15usb: Use local_irq_*_nort() variantsSteven Rostedt
[ tglx: Now that irqf_disabled is dead we should kill that ] Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15input: gameport: Do not disable interrupts on PREEMPT_RTIngo Molnar
Use the _nort() primitives. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15infiniband: Mellanox IB driver patch use _nort() primitivesSven-Thorsten Dietrich
Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT Kernel. Michael S. Tsirkin <mst@dev.mellanox.co.il> sayeth: "Basically, if you just make spin_lock_irqsave (and spin_lock_irq) not disable interrupts for non-raw spinlocks, I think all of infiniband will be fine without changes." Signed-off-by: Sven-Thorsten Dietrich <sven@thebigcorporation.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15ide: Do not disable interrupts for PREEMPT-RTIngo Molnar
Use the local_irq_*_nort variants. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15ata: Do not disable interrupts in ide code for preempt-rtSteven Rostedt
Use the local_irq_*_nort variants. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15hwlatdetect.patchCarsten Emde
Jon Masters developed this wonderful SMI detector. For details please consult Documentation/hwlat_detector.txt. It could be ported to Linux 3.0 RT without any major change. Signed-off-by: Carsten Emde <C.Emde@osadl.org>
2012-02-15ACPI: Convert embedded controller lock to raw spinlockClark Williams
Was seeing multiple "scheduling while atomic" backtraces on the 3.2-rc2-rt5 realtime kernel. This patch converts the spinlock in the ACPI embedded controller structure (curr_lock) to be a raw spinlock. Signed-off-by: Clark Williams <williams@redhat.com> Link: http://lkml.kernel.org/r/20111203093537.7d805f64@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable-rt@vger.kernel.org
2012-02-15acpi: Make gbl_[hardware|gpe]_lock rawThomas Gleixner
These locks are taken in the guts of the idle code and cannot be converted to "sleeping" spinlocks on RT Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15pci: Use __wake_up_all_locked pci_unblock_user_cfg_access()Thomas Gleixner
The waitqueue is protected by the pci_lock, so we can just avoid to lock the waitqueue lock itself. That prevents the might_sleep()/scheduling while atomic problem on RT Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable-rt@vger.kernel.org
2012-02-15locking-various-init-fixes.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15of-convert-devtree-lock.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15OF: Fixup resursive locking code pathsThomas Gleixner
There is no real reason to use a rwlock for devtree_lock. It even could be a mutex, but unfortunately it's locked from cpu hotplug pathes which can't schedule :( So it needs to become a raw lock on rt as well. devtree_lock would be the only user of a raw_rw_lock, so we are better of cleaning the recursive locking pathes which allows us to convert devtree_lock to a read_lock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers: net: at91_ether: Make mdio protection -rt safeThomas Gleixner
Neither the phy interrupt nor the timer callback which updates the link status in absense of a phy interrupt are taking lp->lock which serializes the MDIO access. This works on mainline as at91 is an UP machine. On preempt-rt the timer callback can run even in the spin_lock_irq(&lp->lock) protected code pathes because spin_lock_irq is neither disabling interrupts nor disabling preemption. Fix this by adding proper locking to at91ether_phy_interrupt() and at91_check_ether() which serializes the access on -rt. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers: net: ehea: Make rx irq handler non-threaded (IRQF_NO_THREAD)Darren Hart
The underlying hardware is edge triggered but presented by XICS as level triggered. The edge triggered interrupts are not reissued after masking. This is not a problem in mainline which does not mask the interrupt (relying on the EOI mechanism instead). The threaded interrupts in PREEMPT_RT do mask the interrupt, and can lose interrupts that occurred while masked, resulting in a hung ethernet interface. The receive handler simply calls napi_schedule(), as such, there is no significant additional overhead in making this non-threaded, since we either wakeup the threaded irq handler to call napi_schedule(), or just call napi_schedule() directly to wakeup the softirqs. As the receive handler is lockless, there is no need to convert any of the ehea spinlock_t's to raw_spinlock_t's. Without this patch, a simple scp file copy loop would fail quickly (usually seconds). We have over two hours of sustained scp activity with the patch applied. Credit goes to Will Schmidt for lots of instrumentation and tracing which clarified the scenario and to Thomas Gleixner for the incredibly simple solution. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com> Cc: Jan-Bernd Themann <themann@de.ibm.com> Cc: Nivedita Singhvi <niv@us.ibm.com> Cc: Brian King <bjking1@us.ibm.com> Cc: Michael Ellerman <ellerman@au1.ibm.com> Cc: Doug Maxey <doug.maxey@us.ibm.com> LKML-Reference: <4BF30793.5070300@us.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers/net: Use disable_irq_nosync() in 8139tooIngo Molnar
Use disable_irq_nosync() instead of disable_irq() as this might be called in atomic context with netpoll. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers/net: tulip_remove_one needs to call pci_disable_device()Ingo Molnar
Otherwise the device is not completely shut down. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15clocksource: TCLIB: Allow higher clock rates for clock eventsBenedikt Spranger
As default the TCLIB uses the 32KiHz base clock rate for clock events. Add a compile time selection to allow higher clock resulution. Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15drivers: random: Reduce preempt disabled regionIngo Molnar
No need to keep preemption disabled across the whole function. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-15intel_idle: Convert i7300_idle_lock to raw spinlockMike Galbraith
24 core Intel box's first exposure to 3.0.12-rt30-rc3 didn't go well. [ 27.104159] i7300_idle: loaded v1.55 [ 27.104192] BUG: scheduling while atomic: swapper/2/0/0x00000002 [ 27.104309] Pid: 0, comm: swapper/2 Tainted: G N 3.0.12-rt30-rc3-rt #1 [ 27.104317] Call Trace: [ 27.104338] [<ffffffff810046a5>] dump_trace+0x85/0x2e0 [ 27.104372] [<ffffffff8144eb00>] thread_return+0x12b/0x30b [ 27.104381] [<ffffffff8144f1b9>] schedule+0x29/0xb0 [ 27.104389] [<ffffffff814506e5>] rt_spin_lock_slowlock+0xc5/0x240 [ 27.104401] [<ffffffffa01f818f>] i7300_idle_notifier+0x3f/0x360 [i7300_idle] [ 27.104415] [<ffffffff814546c7>] notifier_call_chain+0x37/0x70 [ 27.104426] [<ffffffff81454748>] __atomic_notifier_call_chain+0x48/0x70 [ 27.104439] [<ffffffff81001a39>] cpu_idle+0x89/0xb0 [ 27.104449] bad: scheduling from the idle thread! Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1323258522.5057.73.camel@marge.simson.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-02-13powernow-k8: Fix indexing issueAndreas Herrmann
commit a8eb28480e9b637cc78b9aa5e08612ba97e1317a upstream. The driver uses the pstate number from the status register as index in its table of ACPI pstates (powernow_table). This is wrong as this is not a 1-to-1 mapping. For example we can have _PSS information to just utilize Pstate 0 and Pstate 4, ie. powernow-k8: Core Performance Boosting: on. powernow-k8: 0 : pstate 0 (2200 MHz) powernow-k8: 1 : pstate 4 (1400 MHz) In this example the driver's powernow_table has just 2 entries. Using the pstate number (4) as index into this table is just plain wrong. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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