i40e: prevent overlapping tx_timeout recover

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[ Upstream commit d5585b7b68 ]

If a TX hang occurs, we attempt to recover by incrementally resetting.
If we're starved for CPU time, it's possible the reset doesn't actually
complete (or even fire) before another tx_timeout fires causing us to
fly through the different resets without actually doing them.

This adds a bit to set and check if a timeout recovery is already
pending and, if so, bail out of tx_timeout.  The bit will get cleared at
the end of i40e_rebuild when reset is complete.

Signed-off-by: Alan Brady <alan.brady@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Alan Brady 2018-10-29 11:27:21 -07:00 • committed by Greg Kroah-Hartman

parent 3fe0bb2c7a

commit 33210638a6

2 changed files with 6 additions and 0 deletions

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1

drivers/net/ethernet/intel/i40e/i40e.h

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5

drivers/net/ethernet/intel/i40e/i40e_main.c

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