From bd91508b50ade5c73b3749bf4e5ede31d2da7ef8 Mon Sep 17 00:00:00 2001
From: Alexey Brodkin <abrodkin@synopsys.com>
Date: Wed, 8 Jun 2016 07:57:19 +0300
Subject: [PATCH] arc/cache: really do invalidate_dcache_all() even if IOC
 exists

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 d1fb661537..a27499e027 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
 }
-- 
2.30.2