scsi: 3w-xxxx: Add error handling for initialization failure in tw_probe()

[ Upstream commit 2e2fe5ac695a00ab03cab4db1f4d6be07168ed9d ]

Smatch complains that:

tw_probe() warn: missing error code 'retval'

This patch adds error checking to tw_probe() to handle initialization
failure. If tw_reset_sequence() function returns a non-zero value, the
function will return -EINVAL to indicate initialization failure.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yuchen Yang <u202114568@hust.edu.cn>
Link: https://lore.kernel.org/r/20230505141259.7730-1-u202114568@hust.edu.cn
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index ffdecb1..9bd70e4 100644 (file)
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -2305,8 +2305,10 @@ static int tw_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
        TW_DISABLE_INTERRUPTS(tw_dev);
 
        /* Initialize the card */
-       if (tw_reset_sequence(tw_dev))
+       if (tw_reset_sequence(tw_dev)) {
+               retval = -EINVAL;
                goto out_release_mem_region;
+       }
 
        /* Set host specific parameters */
        host->max_id = TW_MAX_UNITS;