bnxt_en: Invoke cancel_delayed_work_sync() for PFs also.

As part of the commit b148bb238c02
("bnxt_en: Fix possible crash in bnxt_fw_reset_task()."),
cancel_delayed_work_sync() is called only for VFs to fix a possible
crash by cancelling any pending delayed work items. It was assumed
by mistake that the flush_workqueue() call on the PF would flush
delayed work items as well.

As flush_workqueue() does not cancel the delayed workqueue, extend
the fix for PFs. This fix will avoid the system crash, if there are
any pending delayed work items in fw_reset_task() during driver's
.remove() call.

Unify the workqueue cleanup logic for both PF and VF by calling
cancel_work_sync() and cancel_delayed_work_sync() directly in
bnxt_remove_one().

Fixes: b148bb238c02 ("bnxt_en: Fix possible crash in bnxt_fw_reset_task().")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e4e5ea0..7be2320 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1160,16 +1160,6 @@ static void bnxt_queue_sp_work(struct bnxt *bp)
                schedule_work(&bp->sp_task);
 }
 
-static void bnxt_cancel_sp_work(struct bnxt *bp)
-{
-       if (BNXT_PF(bp)) {
-               flush_workqueue(bnxt_pf_wq);
-       } else {
-               cancel_work_sync(&bp->sp_task);
-               cancel_delayed_work_sync(&bp->fw_reset_task);
-       }
-}
-
 static void bnxt_sched_reset(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
 {
        if (!rxr->bnapi->in_reset) {
@@ -12114,7 +12104,8 @@ static void bnxt_remove_one(struct pci_dev *pdev)
        unregister_netdev(dev);
        clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
        /* Flush any pending tasks */
-       bnxt_cancel_sp_work(bp);
+       cancel_work_sync(&bp->sp_task);
+       cancel_delayed_work_sync(&bp->fw_reset_task);
        bp->sp_event = 0;
 
        bnxt_dl_fw_reporters_destroy(bp, true);