tree ce8c13b78e34c287ed9cdf3062dad38f64572b9e
parent 8e822df700694ca6850d1e0c122fd7004b2778d8
author Michael S. Tsirkin <mst@redhat.com> 1241684921 +0300
committer Jesse Barnes <jbarnes@virtuousgeek.org> 1244747058 -0700

PCI MSI: let drivers retry when not enough vectors

pci_enable_msix currently returns -EINVAL if you ask
for more vectors than supported by the device, which would
typically cause fallback to regular interrupts.

It's better to return the table size, making the driver retry
MSI-X with less vectors.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>