diff options
Diffstat (limited to 'meta-moblin/packages/linux/linux-moblin-2.6.31.5/linux-2.6.33-pit-fix.patch')
| -rw-r--r-- | meta-moblin/packages/linux/linux-moblin-2.6.31.5/linux-2.6.33-pit-fix.patch | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/meta-moblin/packages/linux/linux-moblin-2.6.31.5/linux-2.6.33-pit-fix.patch b/meta-moblin/packages/linux/linux-moblin-2.6.31.5/linux-2.6.33-pit-fix.patch new file mode 100644 index 000000000..78a297400 --- /dev/null +++ b/meta-moblin/packages/linux/linux-moblin-2.6.31.5/linux-2.6.33-pit-fix.patch @@ -0,0 +1,95 @@ +From 42cb68d81a218b0fd7c053356d379a93270b40ea Mon Sep 17 00:00:00 2001 +From: Yong Wang <yong.y.wang@intel.com> +Date: Fri, 30 Oct 2009 10:33:20 +0800 +Subject: [PATCH] x86: Do not unregister PIT clocksource on PIT oneshot setup/shutdown + +Backported from upstream commit 8cab02dc3c58a12235c6d463ce684dded9696848 +and this fixes bug #7377 "system can not resume from S3". Further information +can be found at http://bugzilla.kernel.org/show_bug.cgi?id=14222. + +Signed-off-by: Yong Wang <yong.y.wang@intel.com> +--- + arch/x86/kernel/i8253.c | 36 ++---------------------------------- + 1 files changed, 2 insertions(+), 34 deletions(-) + +diff --git a/arch/x86/kernel/i8253.c b/arch/x86/kernel/i8253.c +index da890f0..23c1679 100644 +--- a/arch/x86/kernel/i8253.c ++++ b/arch/x86/kernel/i8253.c +@@ -19,14 +19,6 @@ + DEFINE_SPINLOCK(i8253_lock); + EXPORT_SYMBOL(i8253_lock); + +-#ifdef CONFIG_X86_32 +-static void pit_disable_clocksource(void); +-static void pit_enable_clocksource(void); +-#else +-static inline void pit_disable_clocksource(void) { } +-static inline void pit_enable_clocksource(void) { } +-#endif +- + /* + * HPET replaces the PIT, when enabled. So we need to know, which of + * the two timers is used +@@ -59,17 +51,15 @@ static void init_pit_timer(enum clock_event_mode mode, + outb_pit(0, PIT_CH0); + outb_pit(0, PIT_CH0); + } +- pit_disable_clocksource(); + break; + + case CLOCK_EVT_MODE_ONESHOT: + /* One shot setup */ +- pit_disable_clocksource(); + outb_pit(0x38, PIT_MODE); + break; + + case CLOCK_EVT_MODE_RESUME: +- pit_enable_clocksource(); ++ /* Nothing to do here */ + break; + } + spin_unlock(&i8253_lock); +@@ -202,27 +192,8 @@ static struct clocksource pit_cs = { + .shift = 20, + }; + +-int pit_cs_registered; +-static void pit_disable_clocksource(void) +-{ +- if (pit_cs_registered) { +- clocksource_unregister(&pit_cs); +- pit_cs_registered = 0; +- } +-} +- +-static void pit_enable_clocksource(void) +-{ +- if (!pit_cs_registered && !clocksource_register(&pit_cs)) { +- pit_cs_registered = 1; +- } +-} +- +- +- + static int __init init_pit_clocksource(void) + { +- int ret; + /* + * Several reasons not to register PIT as a clocksource: + * +@@ -236,10 +207,7 @@ static int __init init_pit_clocksource(void) + + pit_cs.mult = clocksource_hz2mult(CLOCK_TICK_RATE, pit_cs.shift); + +- ret = clocksource_register(&pit_cs); +- if (!ret) +- pit_cs_registered = 1; +- return ret; ++ return clocksource_register(&pit_cs); + } + arch_initcall(init_pit_clocksource); + +-- +1.5.5.1 + |