diff options
| author | Michael Chan <mchan@broadcom.com> | 2011-04-09 00:03:02 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-04-09 00:03:02 +0400 |
| commit | 93ae653491f0a413d5f4d9aa4df45d09ecb55d62 (patch) | |
| tree | 0540b85362f08bd551bcd9f7840a061a71996fa9 /drivers/net/cnic.c | |
| parent | 782d640afd15af7a1faf01cfe566ca4ac511319d (diff) | |
| download | linux-93ae653491f0a413d5f4d9aa4df45d09ecb55d62.tar.xz | |
cnic: Fix rtnl deadlock
When cnic_stop_hw() -> cnic_cm_stop_bnx2x_hw() is called under rtnl_lock()
from NETDEV_DOWN event, it waits for cnic_delete_task() to complete.
It will deadlock when cnic_delete_task() takes rtnl_lock() before
calling cnic_ulp_stop_one().
We fix it by removing the rtnl_lock() in cnic_delete_task().
cnic_ulp_stop_one() has mutex and atomic bit ops to prevent important
operations from being done more than once, so it is not necessary to take
rtnl_lock().
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/cnic.c')
| -rw-r--r-- | drivers/net/cnic.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c index 5dfbff06631c..cde59b4e5ef8 100644 --- a/drivers/net/cnic.c +++ b/drivers/net/cnic.c @@ -3983,9 +3983,7 @@ static void cnic_delete_task(struct work_struct *work) if (test_and_clear_bit(CNIC_LCL_FL_STOP_ISCSI, &cp->cnic_local_flags)) { struct drv_ctl_info info; - rtnl_lock(); cnic_ulp_stop_one(cp, CNIC_ULP_ISCSI); - rtnl_unlock(); info.cmd = DRV_CTL_ISCSI_STOPPED_CMD; cp->ethdev->drv_ctl(dev->netdev, &info); |