linux-kernel - [PATCH] usb: gadget: gr_udc: unconditionally use GFP_ATOMIC in gr_queue

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Date:	Thu,  8 May 2014 00:26:52 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Felipe Balbi <balbi@...com>
Cc:	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	Andreas Larsson <andreas@...sler.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...uxtesting.org
Subject: [PATCH] usb: gadget: gr_udc: unconditionally use GFP_ATOMIC in gr_queue_ext()

As far as gr_queue() is called with spinlock held,
we have to pass GFP_ATOMIC regardless of gfp argument.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/usb/gadget/gr_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index f984ee75324d..19a1b52c4210 100644
--- a/drivers/usb/gadget/gr_udc.c
+++ b/drivers/usb/gadget/gr_udc.c
@@ -1679,7 +1679,7 @@ static int gr_queue_ext(struct usb_ep *_ep, struct usb_request *_req,
 	if (ep->is_in)
 		gr_dbgprint_request("EXTERN", ep, req);
 
-	ret = gr_queue(ep, req, gfp_flags);
+	ret = gr_queue(ep, req, GFP_ATOMIC);
 
 	spin_unlock(&ep->dev->lock);
 
-- 
1.8.3.2

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