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i40e: Relax i40e_xsk_wakeup's return value when PF is busy 

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: b3873a5be7 ("net/i40e: Fix concurrency issues between config flow and XSK")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20200205045834.56795-2-maciej.fijalkowski@intel.com
This commit is contained in:
Maciej Fijalkowski 2020-02-05 05:58:32 +01:00 committed by Daniel Borkmann
parent fc9e34f8de
commit c77e9f0914
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_xsk.c
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@ -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;