* [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe()
@ 2018-07-27 2:29 Jia-Ju Bai
2018-07-27 18:35 ` Dmitry Torokhov
0 siblings, 1 reply; 2+ messages in thread
From: Jia-Ju Bai @ 2018-07-27 2:29 UTC (permalink / raw)
To: dmitry.torokhov; +Cc: linux-input, linux-kernel, Jia-Ju Bai
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
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe()
2018-07-27 2:29 [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe() Jia-Ju Bai
@ 2018-07-27 18:35 ` Dmitry Torokhov
0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Torokhov @ 2018-07-27 18:35 UTC (permalink / raw)
To: Jia-Ju Bai; +Cc: linux-input, linux-kernel
On Fri, Jul 27, 2018 at 10:29:20AM +0800, Jia-Ju Bai wrote:
> 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>
Applied, thank you.
> ---
> 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
>
--
Dmitry
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-07-27 2:29 [PATCH] input: tablet: aiptek: Replace GFP_ATOMIC with GFP_KERNEL in aiptek_probe() Jia-Ju Bai
2018-07-27 18:35 ` Dmitry Torokhov
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