scsi: qla2xxx: Always check the return value of qla24xx_get_isp_stats()

This patch fixes the following Coverity warning:

    CID 361199 (#1 of 1): Unchecked return value (CHECKED_RETURN)
    3. check_return: Calling qla24xx_get_isp_stats without checking return
    value (as is done elsewhere 4 out of 5 times).

Link: https://lore.kernel.org/r/20210320232359.941-7-bvanassche@acm.org
Cc: Quinn Tran <qutran@marvell.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Himanshu Madhani <himanshu.madhani@oracle.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: Lee Duncan <lduncan@suse.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 63391c9be05ddb34417062dea3ecd545891d55a0..3aa9869f6fae2da0f386108be619830323d9687d 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2864,6 +2864,8 @@ qla2x00_reset_host_stats(struct Scsi_Host *shost)
        vha->qla_stats.jiffies_at_last_reset = get_jiffies_64();
 
        if (IS_FWI2_CAPABLE(ha)) {
+               int rval;
+
                stats = dma_alloc_coherent(&ha->pdev->dev,
                    sizeof(*stats), &stats_dma, GFP_KERNEL);
                if (!stats) {
@@ -2873,7 +2875,11 @@ qla2x00_reset_host_stats(struct Scsi_Host *shost)
                }
 
                /* reset firmware statistics */
-               qla24xx_get_isp_stats(base_vha, stats, stats_dma, BIT_0);
+               rval = qla24xx_get_isp_stats(base_vha, stats, stats_dma, BIT_0);
+               if (rval != QLA_SUCCESS)
+                       ql_log(ql_log_warn, vha, 0x70de,
+                              "Resetting ISP statistics failed: rval = %d\n",
+                              rval);
 
                dma_free_coherent(&ha->pdev->dev, sizeof(*stats),
                    stats, stats_dma);