linux-kernel - [PATCH] [246/275] myri10ge: fix rmmod crash

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Message-Id: <20110330210812.B2EED3E1A05@tassilo.jf.intel.com>
Date:	Wed, 30 Mar 2011 14:08:12 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	sgruszka@...hat.com, davem@...emloft.net, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org,
	stable@...nel.org, tim.bird@...sony.com
Subject: [PATCH] [246/275] myri10ge: fix rmmod crash

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Stanislaw Gruszka <sgruszka@...hat.com>

commit cda6587c21a887254c8ed4b58da8fcc4040ab557 upstream.

Rmmod myri10ge crash at free_netdev() -> netif_napi_del(), because napi
structures are already deallocated. To fix call netif_napi_del() before
kfree() at myri10ge_free_slices().

Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 drivers/net/myri10ge/myri10ge.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.35.y/drivers/net/myri10ge/myri10ge.c
===================================================================
--- linux-2.6.35.y.orig/drivers/net/myri10ge/myri10ge.c	2011-03-29 22:50:13.908902524 -0700
+++ linux-2.6.35.y/drivers/net/myri10ge/myri10ge.c	2011-03-29 23:03:03.419212681 -0700
@@ -3600,6 +3600,7 @@
 			dma_free_coherent(&pdev->dev, bytes,
 					  ss->fw_stats, ss->fw_stats_bus);
 			ss->fw_stats = NULL;
+			netif_napi_del(&ss->napi);
 		}
 	}
 	kfree(mgp->ss);
--
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