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ARM: 8564/1: fix cpu feature extracting helper 

Commit b8c9592 "ARM: 8318/1: treat CPU feature register fields as signed
quantities" introduced helper to extract signed quantities of 4-bit
blocks. However, with a current code feature with value 0b1000 isn't
rejected as negative. So fix the "if" condition.

Reported-by: Jonathan Brawn <Jon.Brawn@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Vladimir Murzin 2016-04-19 12:35:55 +01:00 committed by Russell King
parent 03f1217e5f
commit ac36a881b7
1 changed files with 1 additions and 1 deletions
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2
arch/arm/include/asm/cputype.h
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@ -276,7 +276,7 @@ static inline int __attribute_const__ cpuid_feature_extract_field(u32 features,
int feature = (features >> field) & 15;
/* feature registers are signed values */
if (feature > 8)
if (feature > 7)
feature -= 16;
return feature;