CVS commit: src/sys/dev/pci

["Jonathan A. Kollasch" <jakllsch%netbsd.org@localhost>]

Module Name:    src
Committed By:   jakllsch
Date:           Thu Sep 17 17:33:51 UTC 2020

Modified Files:
        src/sys/dev/pci: virtio_pci.c

Log Message:
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 -r1.12 -r1.13 src/sys/dev/pci/virtio_pci.c

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