CVS commit: [netbsd-8] src/sys/dev/pci

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Wed Sep 23 14:31:47 UTC 2020

Modified Files:
        src/sys/dev/pci [netbsd-8]: virtio.c

Log Message:
Pull up following revision(s) (requested by jakllsch in ticket #1609):

        sys/dev/pci/virtio_pci.c: revision 1.13 (patch)
        (applied to sys/dev/pci/virtio.c)

Ensure MSI-X is disabled if allocation of MSI-X interrupts fail.

The virtio device config space moves out from under us when MSI-X
remains enabled, and/or INTx interrupts are masked if we don't ensure
this.

This un-breaks virtio devices that run out of MSI-X interrupts.
Particularly a problem on uniproc x86, where there are only 8 or 9
vectors available, allowing for only about 4 virtio devices to use
MSI-X.


To generate a diff of this commit:
cvs rdiff -u -r1.28.2.2 -r1.28.2.3 src/sys/dev/pci/virtio.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.