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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-07 04:56:04 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-04-07 04:56:04 +0200 |
| commit | f21fec96ead90eae7bcb3c847e8115c119c5dc62 (patch) | |
| tree | d60a74cc16aab57f5c8a4a496f0c6e9f33848d45 /drivers | |
| parent | Merge branch '3.4-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
| parent | Merge branches 'idle-fix' and 'misc' into release (diff) | |
| download | linux-f21fec96ead90eae7bcb3c847e8115c119c5dc62.tar.xz linux-f21fec96ead90eae7bcb3c847e8115c119c5dc62.zip | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull ACPI & Power Management patches from Len Brown:
"Two fixes for cpuidle merge-window changes, plus a URL fix in
MAINTAINERS"
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
MAINTAINERS: Update git url for ACPI
cpuidle: Fix panic in CPU off-lining with no idle driver
ACPI processor: Use safe_halt() rather than halt() in acpi_idle_play_dead()
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 2 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 5 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index b3447f63e46b..f3decb30223f 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -786,7 +786,7 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index) while (1) { if (cx->entry_method == ACPI_CSTATE_HALT) - halt(); + safe_halt(); else if (cx->entry_method == ACPI_CSTATE_SYSTEMIO) { inb(cx->address); /* See comment in acpi_idle_do_entry() */ diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 87411cebc577..2f0083a51a9a 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -74,7 +74,7 @@ static cpuidle_enter_t cpuidle_enter_ops; /** * cpuidle_play_dead - cpu off-lining * - * Only returns in case of an error + * Returns in case of an error or no driver */ int cpuidle_play_dead(void) { @@ -83,6 +83,9 @@ int cpuidle_play_dead(void) int i, dead_state = -1; int power_usage = -1; + if (!drv) + return -ENODEV; + /* Find lowest-power state that supports long-term idle */ for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++) { struct cpuidle_state *s = &drv->states[i]; |