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| author | J. K. Cliburn <jcliburn@gmail.com> | 2011-01-01 05:02:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-03 11:04:49 -0800 |
| commit | 2f32c867219734b06abc980d4812f67b6d6fe517 (patch) | |
| tree | bada002a03498e5204c2706de19f635d9432bb2e /drivers | |
| parent | b9556f9a1abdc56a179ac7ba6053469373b6de0f (diff) | |
| download | linux-2f32c867219734b06abc980d4812f67b6d6fe517.tar.gz linux-2f32c867219734b06abc980d4812f67b6d6fe517.tar.bz2 linux-2f32c867219734b06abc980d4812f67b6d6fe517.zip | |
atl1: fix oops when changing tx/rx ring params
Commit 3f5a2a713aad28480d86b0add00c68484b54febc zeroes out the statistics
message block (SMB) and coalescing message block (CMB) when adapter ring
resources are freed. This is desirable behavior, but, as a side effect,
the commit leads to an oops when atl1_set_ringparam() attempts to alter
the number of rx or tx elements in the ring buffer (by using ethtool
-G, for example). We don't want SMB or CMB to change during this
operation.
Modify atl1_set_ringparam() to preserve SMB and CMB when changing ring
parameters.
Cc: stable@kernel.org
Signed-off-by: Jay Cliburn <jcliburn@gmail.com>
Reported-by: Tõnu Raitviir <jussuf@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/atlx/atl1.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c index 53363108994e..3acf5123a6ef 100644 --- a/drivers/net/atlx/atl1.c +++ b/drivers/net/atlx/atl1.c @@ -3504,6 +3504,8 @@ static int atl1_set_ringparam(struct net_device *netdev, struct atl1_rfd_ring rfd_old, rfd_new; struct atl1_rrd_ring rrd_old, rrd_new; struct atl1_ring_header rhdr_old, rhdr_new; + struct atl1_smb smb; + struct atl1_cmb cmb; int err; tpd_old = adapter->tpd_ring; @@ -3544,11 +3546,19 @@ static int atl1_set_ringparam(struct net_device *netdev, adapter->rrd_ring = rrd_old; adapter->tpd_ring = tpd_old; adapter->ring_header = rhdr_old; + /* + * Save SMB and CMB, since atl1_free_ring_resources + * will clear them. + */ + smb = adapter->smb; + cmb = adapter->cmb; atl1_free_ring_resources(adapter); adapter->rfd_ring = rfd_new; adapter->rrd_ring = rrd_new; adapter->tpd_ring = tpd_new; adapter->ring_header = rhdr_new; + adapter->smb = smb; + adapter->cmb = cmb; err = atl1_up(adapter); if (err) |