tree a6a61973770b1c570019cd9b6218983f3b020b65
parent c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201
author Sasha Neftin <sasha.neftin@intel.com> 1491253370 -0500
committer Bjorn Helgaas <bhelgaas@google.com> 1491253370 -0500

PCI: Avoid FLR for Intel 82579 NICs

Per Intel Specification Update 335553-002 (see link below), some 82579
network adapters advertise a Function Level Reset (FLR) capability, but
they can hang when an FLR is triggered.

To reproduce the problem, attach the device to a VM, then detach and try to
attach again.

Add a quirk to prevent the use of FLR on these devices.

[bhelgaas: changelog, comments]
Link: http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/82579lm-82579v-gigabit-network-connection-spec-update.pdf
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>