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authorAndrew Morton <akpm@osdl.org>2006-06-10 09:54:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-10 11:02:05 -0700
commita913f50706b21c7933f53cec678bb9a1c2383499 (patch)
tree4899980dac61984ea659eb878304a10868aa1b8f
parent670bd95e0413c43f878b73a4a3919d1f452a4157 (diff)
[PATCH] powernow-k8 crash workaround
From: Andrew Morton <akpm@osdl.org> Work around the oops reported in http://bugzilla.kernel.org/show_bug.cgi?id=6478. Thanks to Ralf Hildebrandt <ralf.hildebrandt@charite.de> for testing and reporting. Acked-by: Dave Jones <davej@codemonkey.org.uk> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/acpi/processor_perflib.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index abbdb37a7f5..f36db22ce1a 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -577,6 +577,8 @@ acpi_processor_register_performance(struct acpi_processor_performance
return_VALUE(-EBUSY);
}
+ WARN_ON(!performance);
+
pr->performance = performance;
if (acpi_processor_get_performance_info(pr)) {
@@ -609,7 +611,8 @@ acpi_processor_unregister_performance(struct acpi_processor_performance
return_VOID;
}
- kfree(pr->performance->states);
+ if (pr->performance)
+ kfree(pr->performance->states);
pr->performance = NULL;
acpi_cpufreq_remove_file(pr);