CVS commit: src/sys/dev

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Tue Jul 28 09:36:05 UTC 2020

Modified Files:
        src/sys/dev/ic: nvmevar.h
        src/sys/dev/pci: nvme_pci.c

Log Message:
add a quirk to disable MSI, and enable it for Intel SSD DC P4500

this device seems to cause serious system responsiveness issues when configured
to use MSI, while it works fine when configured for either INTx or MSI-X

this is important so this works well under Xen Dom0, which doesn't
support MSI-X yet

fixes another issue reported as feedback for PR port-xen/55285 by Frank Kardel


To generate a diff of this commit:
cvs rdiff -u -r1.20 -r1.21 src/sys/dev/ic/nvmevar.h
cvs rdiff -u -r1.27 -r1.28 src/sys/dev/pci/nvme_pci.c

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