linux-kernel - [PATCH 7/7] usb: gadget: gr_udc: Use GFP_ATOMIC when allocating under help spinlock

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Date:	Thu, 27 Mar 2014 16:15:59 +0100
From:	Andreas Larsson <andreas@...sler.com>
To:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Mark Rutland <mark.rutland@....com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, software@...sler.com
Subject: [PATCH 7/7] usb: gadget: gr_udc: Use GFP_ATOMIC when allocating under help spinlock

As gr_ep_init must be called with dev->lock held, GFP_KERNEL must not be used.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>

Signed-off-by: Andreas Larsson <andreas@...sler.com>
---
New patch but needs patch 1/7 to apply

 drivers/usb/gadget/gr_udc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index 72458be..4966971 100644
--- a/drivers/usb/gadget/gr_udc.c
+++ b/drivers/usb/gadget/gr_udc.c
@@ -1990,8 +1990,8 @@ static int gr_ep_init(struct gr_udc *dev, int num, int is_in, u32 maxplimit)
 	INIT_LIST_HEAD(&ep->queue);
 
 	if (num == 0) {
-		_req = gr_alloc_request(&ep->ep, GFP_KERNEL);
-		buf = devm_kzalloc(dev->dev, PAGE_SIZE, GFP_DMA | GFP_KERNEL);
+		_req = gr_alloc_request(&ep->ep, GFP_ATOMIC);
+		buf = devm_kzalloc(dev->dev, PAGE_SIZE, GFP_DMA | GFP_ATOMIC);
 		if (!_req || !buf) {
 			/* possible _req freed by gr_probe via gr_remove */
 			return -ENOMEM;
-- 
1.7.10.4

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