linux-kernel - [PATCH] input: mouse: appletouch: Replace GFP_ATOMIC with GFP

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Message-Id: <20180727022618.1007-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 10:26:18 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     dmitry.torokhov@...il.com, gustavo@...eddedor.com,
        arvind.yadav.cs@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] input: mouse: appletouch: Replace GFP_ATOMIC with GFP_KERNEL

atp_open(), atp_recover() and atp_resume() are never 
called in atomic context.
They call usb_submit_urb() with GFP_ATOMIC, which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/input/mouse/appletouch.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 032d27983b6c..f593ec96c95f 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -810,7 +810,7 @@ static int atp_open(struct input_dev *input)
 {
 	struct atp *dev = input_get_drvdata(input);
 
-	if (usb_submit_urb(dev->urb, GFP_ATOMIC))
+	if (usb_submit_urb(dev->urb, GFP_KERNEL))
 		return -EIO;
 
 	dev->open = true;
@@ -976,7 +976,7 @@ static int atp_recover(struct atp *dev)
 	if (error)
 		return error;
 
-	if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
+	if (dev->open && usb_submit_urb(dev->urb, GFP_KERNEL))
 		return -EIO;
 
 	return 0;
@@ -994,7 +994,7 @@ static int atp_resume(struct usb_interface *iface)
 {
 	struct atp *dev = usb_get_intfdata(iface);
 
-	if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
+	if (dev->open && usb_submit_urb(dev->urb, GFP_KERNEL))
 		return -EIO;
 
 	return 0;
-- 
2.17.0