Re: [PATCH 2.4.31] e1000: unlock tx_lock before return

[Michael Renzmann]

Hi all.

Sorry for replying to my own post. I rediffed the patch to make it a -p1
patch as described by DaveM in another (netdev) thread. Also CC'd lkml.

lkml'ers, please CC replies to me, since I'm not subscribed.

Michael Renzmann wrote:
> It may happen that the e1000 driver returns from e1000_xmit_frame()
> while still holding the tx_lock spinlock. This is at least true for the
> version that comes with kernel 2.4.31. The problem doesn't exist in
> 2.6.11.12.
> 
> The attached patch applies to vanilla 2.4.31. I couldn't test the patch
> myself (no e1000 available), but it's a trivial patch and thus it's
> expected to work without problems.
> 
> Signed-off-by: Michael Renzmann <mrenzmann@xxxxxxxxxx>
--- a/drivers/net/e1000/e1000_main.c	2005-04-04 03:42:19.000000000 +0200
+++ b/drivers/net/e1000/e1000_main.c	2005-06-13 21:39:58.000000000 +0200
@@ -1955,8 +1955,8 @@
 		if(unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
 			netif_stop_queue(netdev);
 			mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
-			return 1;
 			spin_unlock_irqrestore(&adapter->tx_lock, flags);
+			return 1;
 		}
 	}