linux-kernel - [PATCH] input: misc: yealink: Replace GFP_ATOMIC with GFP_KERNEL in usb

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Message-Id: <20180727022007.883-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 10:20:07 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     Henk.Vergonet@...il.com, dmitry.torokhov@...il.com
Cc:     usbb2k-api-dev@...gnu.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] input: misc: yealink: Replace GFP_ATOMIC with GFP_KERNEL in usb_probe()

usb_probe() is never called in atomic context.
It calls usb_alloc_coherent() 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/misc/yealink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/misc/yealink.c b/drivers/input/misc/yealink.c
index f0c9bf87b4e3..1365cd94ed9b 100644
--- a/drivers/input/misc/yealink.c
+++ b/drivers/input/misc/yealink.c
@@ -894,12 +894,12 @@ static int usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
 
 	/* allocate usb buffers */
 	yld->irq_data = usb_alloc_coherent(udev, USB_PKT_LEN,
-					   GFP_ATOMIC, &yld->irq_dma);
+					   GFP_KERNEL, &yld->irq_dma);
 	if (yld->irq_data == NULL)
 		return usb_cleanup(yld, -ENOMEM);
 
 	yld->ctl_data = usb_alloc_coherent(udev, USB_PKT_LEN,
-					   GFP_ATOMIC, &yld->ctl_dma);
+					   GFP_KERNEL, &yld->ctl_dma);
 	if (!yld->ctl_data)
 		return usb_cleanup(yld, -ENOMEM);
 
-- 
2.17.0