USB: kaweth.c: use GFP_ATOMIC under spin_lock

[ Upstream commit e4c7f259c5be99dcfc3d98f913590663b0305bf8 ]

The problem is that we call this with a spin lock held.  The call tree
is:
	kaweth_start_xmit() holds kaweth->device_lock.
	-> kaweth_async_set_rx_mode()
	   -> kaweth_control()
	      -> kaweth_internal_control_msg()

The kaweth_internal_control_msg() function is only called from
kaweth_control() which used GFP_ATOMIC for its allocations.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index df2a2cf35a99a3fbd8a89ad04b0ca7a14bddfa72..7a6ccd6c3b4666921a1e2460a394134572362d33 100644 (file)
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -1302,7 +1302,7 @@ static int kaweth_internal_control_msg(struct usb_device *usb_dev,
         int retv;
         int length = 0; /* shut up GCC */
 
-        urb = usb_alloc_urb(0, GFP_NOIO);
+       urb = usb_alloc_urb(0, GFP_ATOMIC);
         if (!urb)
                 return -ENOMEM;