This is a note to let you know that I've just added the patch titled
clocksource: exynos_mct: Fix bitmask regression for exynos4_mct_write
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
clocksource-exynos_mct-fix-bitmask-regression-for-exynos4_mct_write.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8c38d28ba8da98f7102c31d35359b4dbe9d1f329 Mon Sep 17 00:00:00 2001
From: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 22 Oct 2014 03:37:08 +0200
Subject: clocksource: exynos_mct: Fix bitmask regression for exynos4_mct_write
From: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
commit 8c38d28ba8da98f7102c31d35359b4dbe9d1f329 upstream.
EXYNOS4_MCT_L_MASK is defined as 0xffffff00, so applying this bitmask
produces a number outside the range 0x00 to 0xff, which always results
in execution of the default switch statement.
Obviously this is wrong and git history shows that the bitmask inversion
was incorrectly set during a refactoring of the MCT code.
Fix this by putting the inversion at the correct position again.
Acked-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Reported-by: GP Orcullo <kinsamanka@xxxxxxxxx>
Reviewed-by: Doug Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clocksource/exynos_mct.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -94,8 +94,8 @@ static void exynos4_mct_write(unsigned i
__raw_writel(value, reg_base + offset);
if (likely(offset >= EXYNOS4_MCT_L_BASE(0))) {
- stat_addr = (offset & ~EXYNOS4_MCT_L_MASK) + MCT_L_WSTAT_OFFSET;
- switch (offset & EXYNOS4_MCT_L_MASK) {
+ stat_addr = (offset & EXYNOS4_MCT_L_MASK) + MCT_L_WSTAT_OFFSET;
+ switch (offset & ~EXYNOS4_MCT_L_MASK) {
case MCT_L_TCON_OFFSET:
mask = 1 << 3; /* L_TCON write status */
break;
Patches currently in stable-queue which might be from tjakobi@xxxxxxxxxxxxxxxxxxxxx are
queue-3.10/clocksource-exynos_mct-fix-bitmask-regression-for-exynos4_mct_write.patch
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