usbnet: fix deadlock in resume

A usbnet device can share a multifunction device
with a storage device. If the storage device is autoresumed
the usbnet devices also needs to be autoresumed. Allocating
memory with GFP_KERNEL can deadlock in this case.

This should go back into all kernels that have
commit 65841fd5132c3941cdf5df09e70df3ed28323212
That is 3.5

Signed-off-by: Oliver Neukum <oneukum@suse.de>
CC: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 8531c1c..fd4b26d 100644 (file)
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1573,7 +1573,7 @@ int usbnet_resume (struct usb_interface *intf)
                                netif_device_present(dev->net) &&
                                !timer_pending(&dev->delay) &&
                                !test_bit(EVENT_RX_HALT, &dev->flags))
-                                       rx_alloc_submit(dev, GFP_KERNEL);
+                                       rx_alloc_submit(dev, GFP_NOIO);
 
                        if (!(dev->txq.qlen >= TX_QLEN(dev)))
                                netif_tx_wake_all_queues(dev->net);