[PATCH 9/9] staging: ion: Fix page pool cache policy

[John Stultz]

From: Amit Pundir <amit.pundir@xxxxxxxxxx>

Fix redundant "buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE"
checks in if(!cached ...) condition block.

The previous patch, "ion: Handle the memory mapping correctly on
x86", is broken on android-3.18+ kernels. It conflicts with
upstream commit commit 53a91c68fa7b ("staging: ion: Add private
buffer flag to skip page pooling on free"), and breaks the
ION_PRIV_FLAG_SHRINKER_FREE private flag check logic.

Cc: Android Kernel Team <kernel-team@xxxxxxxxxxx>
Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Laura Abbott <labbott@xxxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Reported-by: chenfeng <puck.chen@xxxxxxxxxxxxx>
Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
 drivers/staging/android/ion/ion_system_heap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index fa62cc4..57d115d 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -83,7 +83,7 @@ static void free_buffer_page(struct ion_system_heap *heap,
 	unsigned int order = compound_order(page);
 	bool cached = ion_buffer_cached(buffer);
 
-	if (!cached && !(buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE)) {
+	if (!cached) {
 		struct ion_page_pool *pool = heap->pools[order_to_index(order)];
 		if (buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE)
 			ion_page_pool_free_immediate(pool, page);
-- 
1.9.1