linux-kernel - [34-longterm 008/196] myri10ge: fix rmmod crash

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Date:	Mon, 12 Mar 2012 20:12:16 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Stanislaw Gruszka <sgruszka@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 008/196] myri10ge: fix rmmod crash

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

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.
                   -------------------

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: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 drivers/net/myri10ge/myri10ge.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index ecde087..649b8db6 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -3600,6 +3600,7 @@ static void myri10ge_free_slices(struct myri10ge_priv *mgp)
 			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);
-- 
1.7.9.3

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