scsi: qlogicpti: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

In the error path emit an error message replacing the (less useful)
message by the core. Apart from the improved error message there is no
change in behaviour.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/8242c07f617fc946aab857c9357f540598fe964e.1701619134.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 3b95f7a6216fe72b602b0e9546e7b085f93763a4..5d560d9b8944052c1f7da7a3ac39ad9ccd26f4ae 100644 (file)
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -1409,7 +1409,7 @@ fail_unlink:
        return -ENODEV;
 }
 
-static int qpti_sbus_remove(struct platform_device *op)
+static void qpti_sbus_remove(struct platform_device *op)
 {
        struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
 
@@ -1438,8 +1438,6 @@ static int qpti_sbus_remove(struct platform_device *op)
                of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
 
        scsi_host_put(qpti->qhost);
-
-       return 0;
 }
 
 static const struct of_device_id qpti_match[] = {
@@ -1465,7 +1463,7 @@ static struct platform_driver qpti_sbus_driver = {
                .of_match_table = qpti_match,
        },
        .probe          = qpti_sbus_probe,
-       .remove         = qpti_sbus_remove,
+       .remove_new     = qpti_sbus_remove,
 };
 module_platform_driver(qpti_sbus_driver);