invalidate_dcache_all() could be used in different use-cases and what is especially important most of those cases won't be related to DMAed data to or from peripherals, i.e. we'll be doing invalidation of data used purely by CPU cores.

Given that IOC engine only snoops data that goes through DMA we need to care ourselves about data used only by CPU cores and so remove dependency on IOC from invalidate_dcache_all() and always do real invalidation.

Signed-off-by: Alexey Brodkin abrodkin@synopsys.com --- arch/arc/lib/cache.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c index d1fb661..a27499e 100644 --- a/arch/arc/lib/cache.c +++ b/arch/arc/lib/cache.c @@ -417,13 +417,10 @@ void flush_cache(unsigned long start, unsigned long size)

void invalidate_dcache_all(void) { -#ifdef CONFIG_ISA_ARCV2 - if (!ioc_exists) -#endif - __dc_entire_op(OP_INV); + __dc_entire_op(OP_INV);

#ifdef CONFIG_ISA_ARCV2 - if (slc_exists && !ioc_exists) + if (slc_exists) __slc_entire_op(OP_INV); #endif }