linux-kernel - [PATCH] goldfish_pipe: use GFP

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Message-Id: <20170521004546.29795-1-weiyj.lk@gmail.com>
Date:   Sun, 21 May 2017 00:45:46 +0000
From:   Wei Yongjun <weiyj.lk@...il.com>
To:     jinqian@...roid.com, gregkh@...uxfoundation.org,
        lstoakes@...il.com, jack@...e.cz, mhocko@...e.com,
        christian.koenig@....com
Cc:     Wei Yongjun <weiyongjun1@...wei.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] goldfish_pipe: use GFP_ATOMIC under spin lock

From: Wei Yongjun <weiyongjun1@...wei.com>

The function get_free_pipe_id_locked() is called from
goldfish_pipe_open() with a lock is held, so we should
use GFP_ATOMIC instead of GFP_KERNEL.

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 drivers/platform/goldfish/goldfish_pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
index 2de1e60..5f36721 100644
--- a/drivers/platform/goldfish/goldfish_pipe.c
+++ b/drivers/platform/goldfish/goldfish_pipe.c
@@ -704,7 +704,7 @@ static int get_free_pipe_id_locked(struct goldfish_pipe_dev *dev)
 		/* Reallocate the array */
 		u32 new_capacity = 2 * dev->pipes_capacity;
 		struct goldfish_pipe **pipes =
-			kcalloc(new_capacity, sizeof(*pipes), GFP_KERNEL);
+			kcalloc(new_capacity, sizeof(*pipes), GFP_ATOMIC);
 		if (!pipes)
 			return -ENOMEM;
 		memcpy(pipes, dev->pipes, sizeof(*pipes) * dev->pipes_capacity);