[PATCH 5.9 237/757] sfc: dont double-down() filters in ef100_reset()

Greg Kroah-Hartman
2020-10-27T15:34:25Z

From: Edward Cree <ecree@solarflare.com>

[ Upstream commit 7dcc9d8a40f85cbd76acdebcc45ccdfe4a84337f ]

dev_close(), by way of ef100_net_stop(), already brings down the filter
table, so there's no need to do it again (which just causes lots of
WARN_ONs).
Similarly, don't bring it up ourselves, as dev_open() -> ef100_net_open()
will do it, and will fail if it's already been brought up.

Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/sfc/ef100_nic.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
index 19fe86b3b3169..9cf5b8f8fab9a 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.c
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -428,24 +428,12 @@ static int ef100_reset(struct efx_nic *efx, enum reset_type reset_type)
__clear_bit(reset_type, &efx->reset_pending);
rc = dev_open(efx->net_dev, NULL);
} else if (reset_type == RESET_TYPE_ALL) {
- /* A RESET_TYPE_ALL will cause filters to be removed, so we remove filters
- * and reprobe after reset to avoid removing filters twice
- */
- down_write(&efx->filter_sem);
- ef100_filter_table_down(efx);
- up_write(&efx->filter_sem);
rc = efx_mcdi_reset(efx, reset_type);
if (rc)
return rc;

netif_device_attach(efx->net_dev);

- down_write(&efx->filter_sem);
- rc = ef100_filter_table_up(efx);
- up_write(&efx->filter_sem);
- if (rc)
- return rc;
-
rc = dev_open(efx->net_dev, NULL);
} else {
rc = 1; /* Leave the device closed */
--
2.25.1