diff options
| author | Vitaly Lifshits <vitaly.lifshits@intel.com> | 2020-10-21 14:59:37 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-03-11 09:37:48 -0800 |
| commit | 21f857f0321d0d0ea9b1a758bd55dc63d1cb2437 (patch) | |
| tree | 437de1337bde9ae70b2f6e6e6d661f794843f684 | |
| parent | fc9e5020971d57d7d0b3fef9e2ab2108fcb5588b (diff) | |
e1000e: add rtnl_lock() to e1000_reset_task
A possible race condition was found in e1000_reset_task,
after discovering a similar issue in igb driver via
commit 024a8168b749 ("igb: reinit_locked() should be called
with rtnl_lock").
Added rtnl_lock() and rtnl_unlock() to avoid this.
Fixes: bc7f75fa9788 ("[E1000E]: New pci-express e1000 driver (currently for ICH9 devices only)")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index e9b82c209c2d..a0948002ddf8 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -5974,15 +5974,19 @@ static void e1000_reset_task(struct work_struct *work) struct e1000_adapter *adapter; adapter = container_of(work, struct e1000_adapter, reset_task); + rtnl_lock(); /* don't run the task if already down */ - if (test_bit(__E1000_DOWN, &adapter->state)) + if (test_bit(__E1000_DOWN, &adapter->state)) { + rtnl_unlock(); return; + } if (!(adapter->flags & FLAG_RESTART_NOW)) { e1000e_dump(adapter); e_err("Reset adapter unexpectedly\n"); } e1000e_reinit_locked(adapter); + rtnl_unlock(); } /** |