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bnxt_en: Invoke cancel_delayed_work_sync() for PFs also. 

As part of the commit b148bb238c
("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: b148bb238c ("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>
zero-sugar-mainline-defconfig
Vasundhara Volam 2020-10-26 00:18:18 -04:00 committed by Jakub Kicinski
parent 21d6a11e2c
commit 631ce27a30
1 changed files with 2 additions and 11 deletions
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13
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -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);