From: Thomas Falcon Date: Tue, 27 Aug 2019 16:10:04 +0000 (-0500) Subject: ibmvnic: Do not process reset during or after device removal X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=36f1031c51a2;p=openwrt%2Fstaging%2Fblogic.git ibmvnic: Do not process reset during or after device removal Currently, the ibmvnic driver will not schedule device resets if the device is being removed, but does not check the device state before the reset is actually processed. This leads to a race where a reset is scheduled with a valid device state but is processed after the driver has been removed, resulting in an oops. Fix this by checking the device state before processing a queued reset event. Reported-by: Abdul Haleem Tested-by: Abdul Haleem Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index cebd20f3128d..fa4bb940665c 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1983,6 +1983,10 @@ static void __ibmvnic_reset(struct work_struct *work) rwi = get_next_rwi(adapter); while (rwi) { + if (adapter->state == VNIC_REMOVING || + adapter->state == VNIC_REMOVED) + goto out; + if (adapter->force_reset_recovery) { adapter->force_reset_recovery = false; rc = do_hard_reset(adapter, rwi, reset_state); @@ -2007,7 +2011,7 @@ static void __ibmvnic_reset(struct work_struct *work) netdev_dbg(adapter->netdev, "Reset failed\n"); free_all_rwi(adapter); } - +out: adapter->resetting = false; if (we_lock_rtnl) rtnl_unlock();