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KVM: ARM/arm64: avoid returning negative error code as bool

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is_valid_cache returns true if the specified cache is valid.
Unfortunately, if the parameter passed it out of range, we return
-ENOENT, which ends up as true leading to potential hilarity.

This patch returns false on the failure path instead.

Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Will Deacon 2014-08-26 15:13:22 +01:00 committed by Christoffer Dall
parent 4000be423c
commit 18d457661f
2 changed files with 2 additions and 2 deletions
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2
arch/arm/kvm/coproc.c
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@ -791,7 +791,7 @@ static bool is_valid_cache(u32 val)
u32 level, ctype;
if (val >= CSSELR_MAX)
return -ENOENT;
return false;
/* Bottom bit is Instruction or Data bit. Next 3 bits are level. */
level = (val >> 1);

2
arch/arm64/kvm/sys_regs.c
View File

@ -1218,7 +1218,7 @@ static bool is_valid_cache(u32 val)
u32 level, ctype;
if (val >= CSSELR_MAX)
return -ENOENT;
return false;
/* Bottom bit is Instruction or Data bit. Next 3 bits are level. */
level = (val >> 1);