PCI: add pci_try_set_mwi

As suggested by Andrew, add pci_try_set_mwi(), which does not require
return-value checking.

- add pci_try_set_mwi() without __must_check
- make it return 0 on success, errno if the "try" failed or error
- review callers

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 3fca5898642b..68f150a1e2f4 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -266,7 +266,7 @@ static int cs5530_init_chip(void)
         }
 
         pci_set_master(cs5530_0);
-        pci_set_mwi(cs5530_0);
+        pci_try_set_mwi(cs5530_0);
 
         /*
          * Set PCI CacheLineSize to 16-bytes: