iavf: Fix __IAVF_RESETTING state usage

BugLink: https://bugs.launchpad.net/bugs/1964361
[ Upstream commit 14756b2ae265d526b8356e86729090b01778fdf6 ]

The setup of __IAVF_RESETTING state in watchdog task had no
effect and could lead to slow resets in the driver as
the task for __IAVF_RESETTING state only requeues watchdog.
Till now the __IAVF_RESETTING was interpreted by reset task
as running state which could lead to errors with allocating
and resources disposal.

Make watchdog_task queue the reset task when it's necessary.
Do not update the state to __IAVF_RESETTING so the reset task
knows exactly what is the current state of the adapter.

Fixes: 898ef1cb1cb2 ("iavf: Combine init and watchdog state machines")
Signed-off-by: Slawomir Laba <slawomirx.laba@intel.com>
Signed-off-by: Phani Burra <phani.r.burra@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index e23a062dc39c98c88bb42f4881f4971d67c3cd2d..50ecfb1faf61d45ed89335793cc4cdcbac7b166c 100644 (file)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -1073,8 +1073,7 @@ void iavf_down(struct iavf_adapter *adapter)
                rss->state = IAVF_ADV_RSS_DEL_REQUEST;
        spin_unlock_bh(&adapter->adv_rss_lock);
 
-       if (!(adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) &&
-           adapter->state != __IAVF_RESETTING) {
+       if (!(adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)) {
                /* cancel any current operation */
                adapter->current_op = VIRTCHNL_OP_UNKNOWN;
                /* Schedule operations to close down the HW. Don't wait
@@ -1992,11 +1991,12 @@ static void iavf_watchdog_task(struct work_struct *work)
        if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
                iavf_change_state(adapter, __IAVF_COMM_FAILED);
 
-       if (adapter->flags & IAVF_FLAG_RESET_NEEDED &&
-           adapter->state != __IAVF_RESETTING) {
-               iavf_change_state(adapter, __IAVF_RESETTING);
+       if (adapter->flags & IAVF_FLAG_RESET_NEEDED) {
                adapter->aq_required = 0;
                adapter->current_op = VIRTCHNL_OP_UNKNOWN;
+               mutex_unlock(&adapter->crit_lock);
+               queue_work(iavf_wq, &adapter->reset_task);
+               return;
        }
 
        switch (adapter->state) {
@@ -2290,8 +2290,7 @@ continue_reset:
         * ndo_open() returning, so we can't assume it means all our open
         * tasks have finished, since we're not holding the rtnl_lock here.
         */
-       running = ((adapter->state == __IAVF_RUNNING) ||
-                  (adapter->state == __IAVF_RESETTING));
+       running = adapter->state == __IAVF_RUNNING;
 
        if (running) {
                netif_carrier_off(netdev);