cciss: Fallback to MSI rather than to INTx if MSI-X failed
Currently the driver falls back to INTx mode when MSI-X
initialization failed. This is a suboptimal behaviour
for chips that also support MSI. This update changes that
behaviour and falls back to MSI mode in case MSI-X mode
initialization failed.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Cc: Mike Miller <mike.miller@hp.com> Cc: iss_storagedev@hp.com Cc: Jens Axboe <axboe@kernel.dk> Cc: linux-pci@vger.kernel.org Signed-off-by: Jens Axboe <axboe@fb.com>