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Date: Fri, 21 Feb 2020 08:42:16 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Daniel Borkmann <daniel@...earbox.net>, Björn Töpel <bjorn.topel@...el.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.4 337/344] i40e: Relax i40e_xsk_wakeups return value when PF is busy From: Maciej Fijalkowski <maciej.fijalkowski@...el.com> [ Upstream commit c77e9f09143822623dd71a0fdc84331129e97c3a ] Return -EAGAIN instead of -ENETDOWN to provide a slightly milder information to user space so that an application will know to retry the syscall when __I40E_CONFIG_BUSY bit is set on pf->state. Fixes: b3873a5be757 ("net/i40e: Fix concurrency issues between config flow and XSK") Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com> Signed-off-by: Daniel Borkmann <daniel@...earbox.net> Acked-by: Björn Töpel <bjorn.topel@...el.com> Link: https://lore.kernel.org/bpf/20200205045834.56795-2-maciej.fijalkowski@intel.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/ethernet/intel/i40e/i40e_xsk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index f73cd917c44f7..3156de786d955 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -791,7 +791,7 @@ int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags) struct i40e_ring *ring; if (test_bit(__I40E_CONFIG_BUSY, pf->state)) - return -ENETDOWN; + return -EAGAIN; if (test_bit(__I40E_VSI_DOWN, vsi->state)) return -ENETDOWN; -- 2.20.1
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