From: kfx <kfx@rock-chips.com>
Date: Fri, 9 Mar 2012 01:11:20 +0000 (+0800)
Subject: ion: invalide cache, L1 first
X-Git-Tag: firefly_0821_release~9604
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aa2d99e76ecc618bb0c05d64bda77790703fa0c4;p=firefly-linux-kernel-4.4.55.git

ion: invalide cache, L1 first
---

diff --git a/drivers/gpu/ion/ion_carveout_heap.c b/drivers/gpu/ion/ion_carveout_heap.c
index 5677e9577811..ec355c7da546 100755
--- a/drivers/gpu/ion/ion_carveout_heap.c
+++ b/drivers/gpu/ion/ion_carveout_heap.c
@@ -192,12 +192,18 @@ int ion_carveout_cache_op(struct ion_heap *heap, struct ion_buffer *buffer,
 			outer_flush_range(buffer->priv_phys,buffer->priv_phys + size); 
 			break;
 		case ION_CACHE_CLEAN:
+            /* When cleaning, always clean the innermost (L1) cache first 
+             * and then clean the outer cache(s).
+             */
 			dmac_clean_range((void *)start, (void *)end);
 			outer_clean_range(buffer->priv_phys,buffer->priv_phys + size); 
 			break;
 		case ION_CACHE_INVALID:
-			dmac_inv_range((void *)start, (void *)end);
+            /* When invalidating, always invalidate the outermost cache first 
+             * and the L1 cache last.
+             */
 			outer_inv_range(buffer->priv_phys,buffer->priv_phys + size); 
+			dmac_inv_range((void *)start, (void *)end);
 			break;
 		default:
 			return -EINVAL;