From: hwg <hwg@rock-chips.com>
Date: Thu, 26 Jun 2014 02:13:06 +0000 (+0800)
Subject: asix usb ethernet:
X-Git-Tag: firefly_0821_release~5046
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7091eb42d6e9207a3917df768fbb4f80e53450c3;p=firefly-linux-kernel-4.4.55.git

asix usb ethernet:
 avoid kernel panic when alloc skb fail in lowmemory case
---

diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
old mode 100644
new mode 100755
index 577c72d5f369..97a93e842ed9
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -111,6 +111,12 @@ int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
 			rx->size = skb->len - offset;
 		}
 
+		if (!rx->ax_skb) {
+			rx->size = 0;
+			netdev_err(dev->net, "asix_rx_fixup_internal Bad ax_skb buf.\n");
+			return 0;
+		}
+
 		data = skb_put(rx->ax_skb, rx->size);
 		memcpy(data, skb->data + offset, rx->size);
 		if (!remaining)