mailbox: bcm-pdc: 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().

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>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

diff --git a/drivers/mailbox/bcm-pdc-mailbox.c b/drivers/mailbox/bcm-pdc-mailbox.c
index 778faeced81e1d6c409b74a551f8b755dbb48553..1768d3d5aaa011a1e2528bbc576aa3215d2bd2e1 100644 (file)
--- a/drivers/mailbox/bcm-pdc-mailbox.c
+++ b/drivers/mailbox/bcm-pdc-mailbox.c
@@ -1605,7 +1605,7 @@ static int pdc_probe(struct platform_device *pdev)
        return err;
 }
 
-static int pdc_remove(struct platform_device *pdev)
+static void pdc_remove(struct platform_device *pdev)
 {
        struct pdc_state *pdcs = platform_get_drvdata(pdev);
 
@@ -1617,12 +1617,11 @@ static int pdc_remove(struct platform_device *pdev)
 
        dma_pool_destroy(pdcs->rx_buf_pool);
        dma_pool_destroy(pdcs->ring_pool);
-       return 0;
 }
 
 static struct platform_driver pdc_mbox_driver = {
        .probe = pdc_probe,
-       .remove = pdc_remove,
+       .remove_new = pdc_remove,
        .driver = {
                   .name = "brcm-iproc-pdc-mbox",
                   .of_match_table = pdc_mbox_of_match,