tree d723684cdea22ba17f66c3c41f09fe1f72de7724
parent 98e959d44bcaac70c3056578122b5ce777ff42f0
author Jim Harris <james.r.harris@intel.com> 1493734859 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1495119546 +0200

uio/uio_pci_generic: don't fail probe if pdev->irq == NULL

Some userspace drivers and frameworks only poll and do not
require interrupts to be available and enabled on the
PCI device.  So remove the requirement that an IRQ is
assigned.  If an IRQ is not assigned and a userspace
driver tries to read()/write(), the generic uio
framework will just return -EIO.

This allows binding uio_pci_generic to devices which
cannot get an IRQ assigned, such as an NVMe controller
behind Intel Volume Management Device (VMD), since VMD
does not support INTx interrupts.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>