commit 104ba83363d1d42af62abb247f1426c09a80fced
author Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Thu Oct 19 20:07:36 2017 +0100
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> Thu Oct 26 07:42:58 2017 -0700
tree 2427b4f0ce295c14b91706891ca830bdb0aae6a1
parent 5983587c8c5ef00d6886477544ad67d495bc5479

igb: Fix TX map failure path

When the driver cannot map a TX buffer, instead of rolling back
gracefully and retrying later, we currently get a panic:

[  159.885994] igb 0000:00:00.0: TX DMA map failed
[  159.886588] Unable to handle kernel paging request at virtual address ffff00000a08c7a8
               ...
[  159.897031] PC is at igb_xmit_frame_ring+0x9c8/0xcb8

Fix the erroneous test that leads to this situation.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>