From: Martin Habets <mhabets@solarflare.com>
Date: Thu, 21 Nov 2019 17:52:15 +0000
Subject: sfc: Only cancel the PPS workqueue if it exists
Git-commit: 723eb53690041740a13ac78efeaf6804f5d684c9
Patch-mainline: 5.4
References: networking-stable-19_11_25
The workqueue only exists for the primary PF. For other functions
we hit a WARN_ON in kernel/workqueue.c.
Fixes: 7c236c43b838 ("sfc: Add support for IEEE-1588 PTP")
Signed-off-by: Martin Habets <mhabets@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/net/ethernet/sfc/ptp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -1320,7 +1320,8 @@ void efx_ptp_remove(struct efx_nic *efx)
(void)efx_ptp_disable(efx);
cancel_work_sync(&efx->ptp_data->work);
- cancel_work_sync(&efx->ptp_data->pps_work);
+ if (efx->ptp_data->pps_workwq)
+ cancel_work_sync(&efx->ptp_data->pps_work);
skb_queue_purge(&efx->ptp_data->rxq);
skb_queue_purge(&efx->ptp_data->txq);