1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index ab4797ed94c9..568d73847dca 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -245,13 +245,20 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
          * Allocate a new sk buffer to replace the current one.
          * If allocation fails, we should drop the current frame
          * so we can recycle the existing sk buffer for the new frame.
+         * As alignment we use 2 and not NET_IP_ALIGN because we need
+         * to be sure we have 2 bytes room in the head. (NET_IP_ALIGN
+         * can be 0 on some hardware). We use these 2 bytes for frame
+         * alignment later, we assume that the chance that
+         * header_size % 4 == 2 is bigger then header_size % 2 == 0
+         * and thus optimize alignment by reserving the 2 bytes in
+         * advance.
          */
         frame_size = entry->ring->data_size + entry->ring->desc_size;
-        skb = dev_alloc_skb(frame_size + NET_IP_ALIGN);
+        skb = dev_alloc_skb(frame_size + 2);
         if (!skb)
                 goto skip_entry;
 
-        skb_reserve(skb, NET_IP_ALIGN);
+        skb_reserve(skb, 2);
         skb_put(skb, frame_size);
 
         /*