tree d7b49a84183e8fe0e2b86d38b2f1a1bfe2278241
parent 17351401fec6df1e6032054cd3c2ea03ad917a92
author Jesse Brandeburg <jesse.brandeburg@intel.com> 1437684874 -0400
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> 1443615686 -0700

i40e/i40evf: fix Tx hang workaround code

The arm writeback (arm_wb) code is used for kicking the Tx ring to
make sure any pending work is completed even if interrupts are
disabled. It was running when it didn't need to, and not clearing
the ring->arm_wb state after it was set.  This caused Tx hangs
to still occur occasionally when there really was no hang.
Fix this by resetting the variable right after it was used.

Change-ID: I7bf75d552ba9c4bd203d40615213861a24bb5594
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>