From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: dmitry.torokhov@gmail.com
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
Jia-Ju Bai <baijiaju1990@gmail.com>
Subject: [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe()
Date: Fri, 27 Jul 2018 10:29:20 +0800 [thread overview]
Message-ID: <20180727022920.1233-1-baijiaju1990@gmail.com> (raw)
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@gmail.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
next reply other threads:[~2018-07-27 2:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 2:29 Jia-Ju Bai [this message]
2018-07-27 18:35 ` Dmitry Torokhov
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