linux-toradex.git/arch/arm, branch v3.10.43 Linux kernel for Apalis and Colibri modules ARM: perf: hook up perf_sample_event_took around pmu irq handling 2014-06-11T19:03:27+00:00 Will Deacon will.deacon@arm.com 2014-02-11T18:08:41+00:00 c318d7b4db9b4f47e0e29c24f4cac6f5e0644dc1 commit 5f5092e72cc25a6a5785308270e0085b2b2772cc upstream. Since we indirect all of our PMU IRQ handling through a dispatcher, it's trivial to hook up perf_sample_event_took to prevent applications such as oprofile from generating interrupt storms due to an unrealisticly low sample period. Reported-by: Robert Richter <rric@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Weng Meiling <wengmeiling.weng@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 5f5092e72cc25a6a5785308270e0085b2b2772cc upstream.

Since we indirect all of our PMU IRQ handling through a dispatcher, it's
trivial to hook up perf_sample_event_took to prevent applications such
as oprofile from generating interrupt storms due to an unrealisticly
low sample period.

Reported-by: Robert Richter <rric@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: 8051/1: put_user: fix possible data corruption in put_user 2014-06-11T19:03:23+00:00 Andrey Ryabinin a.ryabinin@samsung.com 2014-05-07T07:07:25+00:00 b1da22af26d907e88925c2ce1a9ee527bd899875 commit 537094b64b229bf3ad146042f83e74cf6abe59df upstream. According to arm procedure call standart r2 register is call-cloberred. So after the result of x expression was put into r2 any following function call in p may overwrite r2. To fix this, the result of p expression must be saved to the temporary variable before the assigment x expression to __r2. Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com> Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 537094b64b229bf3ad146042f83e74cf6abe59df upstream.

According to arm procedure call standart r2 register is call-cloberred.
So after the result of x expression was put into r2 any following
function call in p may overwrite r2. To fix this, the result of p
expression must be saved to the temporary variable before the
assigment x expression to __r2.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: OMAP4: Fix the boot regression with CPU_IDLE enabled 2014-06-11T19:03:23+00:00 Santosh Shilimkar santosh.shilimkar@ti.com 2014-05-12T21:37:59+00:00 c506847413e50969d24e26bc00595e982796a5dc commit 4b353a706a86598ba47307c47301c3c428b79e09 upstream. On OMAP4 panda board, there have been several bug reports about boot hang and lock-ups with CPU_IDLE enabled. The root cause of the issue is missing interrupts while in idle state. Commit cb7094e8 {cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag} moved the broadcast notifiers to common code for right reasons but on OMAP4 which suffers from a nasty ROM code bug with GIC, commit ff999b8a {ARM: OMAP4460: Workaround for ROM bug ..}, we loose interrupts which leads to issues like lock-up, hangs etc. Patch reverts commit cb7094 {cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag} and 54769d6 {cpuidle: OMAP4: remove timer broadcast initialization} to avoid the issue. With this change, OMAP4 panda boards, the mentioned issues are getting fixed. We no longer loose interrupts which was the cause of the regression. Fixes: cb7094e8 (cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag) Fixes: ff999b8a (cpuidle: OMAP4: remove timer broadcast initialization) Cc: Roger Quadros <rogerq@ti.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Tony Lindgren <tony@atomide.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Reported-tested-by: Roger Quadros <rogerq@ti.com> Reported-tested-by: Kevin Hilman <khilman@linaro.org> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 4b353a706a86598ba47307c47301c3c428b79e09 upstream.

On OMAP4 panda board, there have been several bug reports about boot
hang and lock-ups with CPU_IDLE enabled. The root cause of the issue
is missing interrupts while in idle state. Commit cb7094e8 {cpuidle / omap4 :
use CPUIDLE_FLAG_TIMER_STOP flag} moved the broadcast notifiers to common
code for right reasons but on OMAP4 which suffers from a nasty ROM code
bug with GIC, commit ff999b8a {ARM: OMAP4460: Workaround for ROM bug ..},
we loose interrupts which leads to issues like lock-up, hangs etc.

Patch reverts commit cb7094 {cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP
flag} and 54769d6 {cpuidle: OMAP4: remove timer broadcast initialization} to
avoid the issue. With this change, OMAP4 panda boards, the mentioned
issues are getting fixed. We no longer loose interrupts which was the cause
of the regression.

Fixes: cb7094e8 (cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag)
Fixes: ff999b8a (cpuidle: OMAP4: remove timer broadcast initialization)
Cc: Roger Quadros <rogerq@ti.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Reported-tested-by: Roger Quadros <rogerq@ti.com>
Reported-tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: OMAP3: clock: Back-propagate rate change from cam_mclk to dpll4_m5 on all OMAP3 platforms 2014-06-11T19:03:23+00:00 Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com 2014-04-21T13:06:23+00:00 8d1bf0a204da672b10874ba91907ef0492288a7a commit 98d7e1aee6dd534f468993f8c6a1bc730d4cfa81 upstream. Commit 7b2e1277598e4187c9be3e61fd9b0f0423f97986 ("ARM: OMAP3: clock: Back-propagate rate change from cam_mclk to dpll4_m5") enabled clock rate back-propagation from cam_mclk do dpll4_m5 on OMAP3630 only. Perform back-propagation on other OMAP3 platforms as well. Reported-by: Jean-Philippe François <jp.francois@cynove.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 98d7e1aee6dd534f468993f8c6a1bc730d4cfa81 upstream.

Commit 7b2e1277598e4187c9be3e61fd9b0f0423f97986 ("ARM: OMAP3: clock:
Back-propagate rate change from cam_mclk to dpll4_m5") enabled clock
rate back-propagation from cam_mclk do dpll4_m5 on OMAP3630 only.
Perform back-propagation on other OMAP3 platforms as well.

Reported-by: Jean-Philippe François <jp.francois@cynove.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: imx: fix error handling in ipu device registration 2014-06-11T19:03:23+00:00 Emil Goode emilgoode@gmail.com 2014-05-19T07:07:54+00:00 6a93022f1d099b66b573aac243a4df890fd0a1c4 commit d1d70e5dc2cfa9047bb935c41ba808ebb8135696 upstream. If we fail to allocate struct platform_device pdev we dereference it after the goto label err. This bug was found using coccinelle. Fixes: afa77ef (ARM: mx3: dynamically allocate "ipu-core" devices) Signed-off-by: Emil Goode <emilgoode@gmail.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit d1d70e5dc2cfa9047bb935c41ba808ebb8135696 upstream.

If we fail to allocate struct platform_device pdev we
dereference it after the goto label err.

This bug was found using coccinelle.

Fixes: afa77ef (ARM: mx3: dynamically allocate "ipu-core" devices)
Signed-off-by: Emil Goode <emilgoode@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr 2014-06-07T20:25:34+00:00 Liu Hua sdu.liu@huawei.com 2014-03-27T05:56:18+00:00 4468ae6574c41a73bc3c126b32dfff73538656c7 commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream. When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will overflow if pfn >= 0x100000 in copy_oldmem_page. So use __pfn_to_phys for converting. Signed-off-by: Liu Hua <sdu.liu@huawei.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream.

When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: dts: i.MX53: Fix ipu register space size 2014-06-07T20:25:34+00:00 Sascha Hauer s.hauer@pengutronix.de 2014-05-06T11:01:34+00:00 252f0f90820c59870cb566f1718f16708a68857d commit 6d66da89bf4422c0a0693627fb3e25f74af50f92 upstream. The IPU register space is 128MB, not 2GB. Fixes: abed9a6bf2bb 'ARM i.MX53: Add IPU support' Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 6d66da89bf4422c0a0693627fb3e25f74af50f92 upstream.

The IPU register space is 128MB, not 2GB.

Fixes: abed9a6bf2bb 'ARM i.MX53: Add IPU support'
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: multi_v7_defconfig: enable ARM_ATAG_DTB_COMPAT 2014-05-31T04:52:12+00:00 Olof Johansson olof@lixom.net 2013-09-16T16:01:24+00:00 e1af8f80e8398591f96d2e35e02a5deca6118c38 commit a0396b9bd5a4a7baf598b60d2ca53c605c440a42 upstream. Without this, legacy platforms that can boot with a multiplatform kernel but that need the DTB to be appended, won't have a way to pass firmware-set bootargs to the kernel. This is needed to boot multi_v7_defconfig on snowball, for instance. Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Kevin Hilman <khilman@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit a0396b9bd5a4a7baf598b60d2ca53c605c440a42 upstream.

Without this, legacy platforms that can boot with a multiplatform
kernel but that need the DTB to be appended, won't have a way to pass
firmware-set bootargs to the kernel.

This is needed to boot multi_v7_defconfig on snowball, for instance.

Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm: multi_v7_defconfig: Enable initrd/initramfs support 2014-05-31T04:52:12+00:00 Soren Brinkmann soren.brinkmann@xilinx.com 2013-06-19T17:53:04+00:00 ee5e96604bdf348b3fcb9b32b59a63589d66548c commit c12d82b84353784f8233c28ee43cec0ac9fbd7d2 upstream. Add CONFIG_BLK_DEV_INITRD to the defconfig to support initramfs and initrd. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit c12d82b84353784f8233c28ee43cec0ac9fbd7d2 upstream.

Add CONFIG_BLK_DEV_INITRD to the defconfig to support
initramfs and initrd.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: 7840/1: LPAE: don't reject mapping /dev/mem above 4GB 2014-05-13T11:59:41+00:00 Sergey Dyasly dserrg@gmail.com 2013-09-24T15:38:00+00:00 b6b461e90f8fbebb8fa46f363999ed5023be7d3c commit 3159f372354e8e1f5dee714663d705dd2c7e0759 upstream. With LPAE enabled, physical address space is larger than 4GB. Allow mapping any part of it via /dev/mem by using PHYS_MASK to determine valid range. PHYS_MASK covers 40 bits with LPAE enabled and 32 bits otherwise. Reported-by: Vassili Karpov <av1474@comtv.ru> Signed-off-by: Sergey Dyasly <dserrg@gmail.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: hujianyang <hujianyang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 3159f372354e8e1f5dee714663d705dd2c7e0759 upstream.

With LPAE enabled, physical address space is larger than 4GB. Allow mapping any
part of it via /dev/mem by using PHYS_MASK to determine valid range.

PHYS_MASK covers 40 bits with LPAE enabled and 32 bits otherwise.

Reported-by: Vassili Karpov <av1474@comtv.ru>
Signed-off-by: Sergey Dyasly <dserrg@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: hujianyang <hujianyang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>