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up_coherent_dcache should do nothing the the length is zero

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This commit is contained in:
Gregory Nutt 2014-08-26 14:51:53 -06:00
parent b13d9b4161
commit 519e9c85e9
1 changed files with 6 additions and 3 deletions
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9
arch/arm/src/armv7-a/arm_coherent_dcache.c
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@ -82,13 +82,16 @@
void up_coherent_dcache(uintptr_t addr, size_t len) void up_coherent_dcache(uintptr_t addr, size_t len)
{ {
/* Perform the operation on the L1 cache */ if (len > 0)
{
/* Perform the operation on the L1 cache */
cp15_coherent_dcache(addr, addr+len); cp15_coherent_dcache(addr, addr + len - 1);
#ifdef CONFIG_ARCH_L2CACHE #ifdef CONFIG_ARCH_L2CACHE
/* If we have an L2 cache, then there more things that need to done */ /* If we have an L2 cache, then there more things that need to done */
# warning This is insufficient # warning This is insufficient
#endif #endif
}
} }