[PATCH 13/40] scsi: qla4xxx: ql4_init: Check return value of pci_set_mwi()

[Lee Jones]

pci_set_mwi() has 'warn_unused_result' so the result should be checked.

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/qla4xxx/ql4_init.c: In function ‘qla4xxx_pci_config’:
 drivers/scsi/qla4xxx/ql4_init.c:664:6: warning: variable ‘status’ set but not 
used [-Wunused-but-set-variable]

And if 'status' is removed:

 drivers/scsi/qla4xxx/ql4_init.c: In function ‘qla4xxx_pci_config’:
 drivers/scsi/qla4xxx/ql4_init.c:666:2: warning: ignoring return value of 
‘pci_set_mwi’, declared with attribute warn_unused_result [-Wunused-result]
 666 | pci_set_mwi(ha->pdev);
 | ^~~~~~~~~~~~~~~~~~~~~

Cc: qlogic-storage-upstr...@qlogic.com
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
---
 drivers/scsi/qla4xxx/ql4_init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c
index 82f6e7f3969ec..4afd43610f68f 100644
--- a/drivers/scsi/qla4xxx/ql4_init.c
+++ b/drivers/scsi/qla4xxx/ql4_init.c
@@ -665,6 +665,9 @@ void qla4xxx_pci_config(struct scsi_qla_host *ha)
 
        pci_set_master(ha->pdev);
        status = pci_set_mwi(ha->pdev);
+       if (status)
+               ql4_printk(KERN_WARNING, ha, "Failed to set MWI\n");
+
        /*
         * We want to respect framework's setting of PCI configuration space
         * command register and also want to make sure that all bits of
-- 
2.25.1