linux-kernel - [PATCH 3.13.y-ckt 022/121] USB: opticon: fix non-atomic allocation in write path

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Message-Id: <1417548000-1794-23-git-send-email-kamal@canonical.com>
Date:	Tue,  2 Dec 2014 11:18:21 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Johan Hovold <johan@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 022/121] USB: opticon: fix non-atomic allocation in write path

3.13.11-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan@...nel.org>

commit e681286de221af78fc85db9222b6a203148c005a upstream.

Write may be called from interrupt context so make sure to use
GFP_ATOMIC for all allocations in write.

Fixes: 0d930e51cfe6 ("USB: opticon: Add Opticon OPN2001 write support")
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/usb/serial/opticon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index cbe779f..df495ea 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -219,7 +219,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 
 	/* The conncected devices do not have a bulk write endpoint,
 	 * to transmit data to de barcode device the control endpoint is used */
-	dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
+	dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 	if (!dr) {
 		dev_err(&port->dev, "out of memory\n");
 		count = -ENOMEM;
-- 
1.9.1

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