This is a note to let you know that I've just added the patch titled sfc: don't double-down() filters in ef100_reset() to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: sfc-don-t-double-down-filters-in-ef100_reset.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit c11a80b501503f6c1079b2b23db83b8d27d3583a Author: Edward Cree <ecree@xxxxxxxxxxxxxx> Date: Mon Sep 7 17:14:20 2020 +0100 sfc: don't double-down() filters in ef100_reset() [ 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@xxxxxxxxxxxxxx> Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> 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 */