scsi: sun_esp: 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/1d385231c23c2a1e6e7dc1968eb111327386d1f6.1701619134.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/sun_esp.c b/drivers/scsi/sun_esp.c
index afa9d02a33eca3d6094db6001cff2b429662ed70..64a7c2c6c5ff424f6742e3f2e2cbd3fa8fbfa06f 100644 (file)
--- a/drivers/scsi/sun_esp.c
+++ b/drivers/scsi/sun_esp.c
@@ -550,7 +550,7 @@ static int esp_sbus_probe(struct platform_device *op)
        return ret;
 }
 
-static int esp_sbus_remove(struct platform_device *op)
+static void esp_sbus_remove(struct platform_device *op)
 {
        struct esp *esp = dev_get_drvdata(&op->dev);
        struct platform_device *dma_of = esp->dma;
@@ -581,8 +581,6 @@ static int esp_sbus_remove(struct platform_device *op)
        dev_set_drvdata(&op->dev, NULL);
 
        put_device(&dma_of->dev);
-
-       return 0;
 }
 
 static const struct of_device_id esp_match[] = {
@@ -605,7 +603,7 @@ static struct platform_driver esp_sbus_driver = {
                .of_match_table = esp_match,
        },
        .probe          = esp_sbus_probe,
-       .remove         = esp_sbus_remove,
+       .remove_new     = esp_sbus_remove,
 };
 module_platform_driver(esp_sbus_driver);