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x86: cacheinfo: correct return value when cache_disable feature is not active

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Impact: bug fix

If user writes to "cache_disable" attribute on a CPU that does not support
this feature, the process hangs due to an invalid return value in
store_cache_disable().

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <20090409130729.GH31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Andreas Herrmann
2009-04-09 15:07:29 +02:00
committed by Ingo Molnar
parent bda869c614
commit 845d8c761e
1 changed files with 1 additions and 1 deletions
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arch/x86/kernel/cpu/intel_cacheinfo.c
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@@ -771,7 +771,7 @@ store_cache_disable(struct _cpuid4_info *this_leaf, const char *buf,
unsigned int ret, index, val; unsigned int ret, index, val;
if (!this_leaf->can_disable) if (!this_leaf->can_disable)
return 0; return -EINVAL;
if (strlen(buf) > 15) if (strlen(buf) > 15)
return -EINVAL; return -EINVAL;