linux-kernel - [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek

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Message-Id: <20180727022920.1233-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 10:29:20 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     dmitry.torokhov@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe()

aiptek_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/tablet/aiptek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index 545fa6e89035..c82cd5079d0e 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1712,7 +1712,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
         }
 
 	aiptek->data = usb_alloc_coherent(usbdev, AIPTEK_PACKET_LENGTH,
-					  GFP_ATOMIC, &aiptek->data_dma);
+					  GFP_KERNEL, &aiptek->data_dma);
         if (!aiptek->data) {
 		dev_warn(&intf->dev, "cannot allocate usb buffer\n");
 		goto fail1;
-- 
2.17.0