tree 76900e77ba8449de18b4913f67de69962e3be11f
parent 4a665d628f938af3718e89247f5b8a77fbf8c536
author Casey Leedom <leedom@chelsio.com> 1518705198 +0530
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1519809581 +0100

PCI/cxgb4: Extend T3 PCI quirk to T4+ devices

commit 7dcf688d4c78a18ba9538b2bf1b11dc7a43fe9be upstream.

We've run into a problem where our device is attached
to a Virtual Machine and the use of the new pci_set_vpd_size()
API doesn't help.  The VM kernel has been informed that
the accesses are okay, but all of the actual VPD Capability
Accesses are trapped down into the KVM Hypervisor where it
goes ahead and imposes the silent denials.

The right idea is to follow the kernel.org
commit 1c7de2b4ff88 ("PCI: Enable access to non-standard VPD for
Chelsio devices (cxgb3)") which Alexey Kardashevskiy authored
to establish a PCI Quirk for our T3-based adapters. This commit
extends that PCI Quirk to cover Chelsio T4 devices and later.

The advantage of this approach is that the VPD Size gets set early
in the Base OS/Hypervisor Boot and doesn't require that the cxgb4
driver even be available in the Base OS/Hypervisor.  Thus PF4 can
be exported to a Virtual Machine and everything should work.

Fixes: 67e658794ca1 ("cxgb4: Set VPD size so we can read both VPD structures")
Cc: <stable@vger.kernel.org>  # v4.9+
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>