linux-kernel - [PATCH] ION: Sys_heap: fix the incorrect pool->gfp

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Message-ID: <1515494623-8383-1-git-send-email-prime.zeng@hisilicon.com>
Date:   Tue, 9 Jan 2018 18:43:43 +0800
From:   Zeng Tao <prime.zeng@...ilicon.com>
To:     <labbott@...hat.com>, <sumit.semwal@...aro.org>,
        <gregkh@...uxfoundation.org>, <arve@...roid.com>,
        <tkjos@...roid.com>, <maco@...roid.com>
CC:     <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
        <puck.chen@...ilicon.com>
Subject: [PATCH] ION: Sys_heap: fix the incorrect pool->gfp_mask setting

This issue is introduced by the commit <e7f63771b60e> ("ION: Sys_heap:
Add cached pool to spead up cached buffer alloc"), the gfp_mask low
order pool is overlapped by the high order inside the loop, so the
gfp_mask of all pools are set to high_order_gfp_flags.

Signed-off-by: Zeng Tao <prime.zeng@...ilicon.com>
---
 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 4dc5d7a..b6386be 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -298,10 +298,10 @@ static int ion_system_heap_create_pools(struct ion_page_pool **pools,
 					bool cached)
 {
 	int i;
-	gfp_t gfp_flags = low_order_gfp_flags;
 
 	for (i = 0; i < NUM_ORDERS; i++) {
 		struct ion_page_pool *pool;
+		gfp_t gfp_flags = low_order_gfp_flags;
 
 		if (orders[i] > 4)
 			gfp_flags = high_order_gfp_flags;
-- 
2.7.4