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, 4 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index dcb4ba0ecee1..955b2e48d041 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -1578,10 +1578,7 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
         INIT_LIST_HEAD(&phba->fc_nodes);
 
         pci_set_master(pdev);
-        retval = pci_set_mwi(pdev);
-        if (retval)
-                dev_printk(KERN_WARNING, &pdev->dev,
-                           "Warning: pci_set_mwi returned %d\n", retval);
+        pci_try_set_mwi(pdev);
 
         if (pci_set_dma_mask(phba->pcidev, DMA_64BIT_MASK) != 0)
                 if (pci_set_dma_mask(phba->pcidev, DMA_32BIT_MASK) != 0)