Commit 38be8951 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Bjorn Andersson

rpmsg: qcom_smd: 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 (mostly) ignored
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.

qcom_smd_remove() always returned zero, though that isn't completely
trivial to see. So explain that in a comment and convert to
.remove_new().
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230321154039.355098-4-u.kleine-koenig@pengutronix.de
parent 49446e57
...@@ -1579,15 +1579,13 @@ static int qcom_smd_remove_edge(struct device *dev, void *data) ...@@ -1579,15 +1579,13 @@ static int qcom_smd_remove_edge(struct device *dev, void *data)
* Shut down all smd clients by making sure that each edge stops processing * Shut down all smd clients by making sure that each edge stops processing
* events and scanning for new channels, then call destroy on the devices. * events and scanning for new channels, then call destroy on the devices.
*/ */
static int qcom_smd_remove(struct platform_device *pdev) static void qcom_smd_remove(struct platform_device *pdev)
{ {
int ret; /*
* qcom_smd_remove_edge always returns zero, so there is no need to
ret = device_for_each_child(&pdev->dev, NULL, qcom_smd_remove_edge); * check the return value of device_for_each_child.
if (ret) */
dev_warn(&pdev->dev, "can't remove smd device: %d\n", ret); device_for_each_child(&pdev->dev, NULL, qcom_smd_remove_edge);
return ret;
} }
static const struct of_device_id qcom_smd_of_match[] = { static const struct of_device_id qcom_smd_of_match[] = {
...@@ -1598,7 +1596,7 @@ MODULE_DEVICE_TABLE(of, qcom_smd_of_match); ...@@ -1598,7 +1596,7 @@ MODULE_DEVICE_TABLE(of, qcom_smd_of_match);
static struct platform_driver qcom_smd_driver = { static struct platform_driver qcom_smd_driver = {
.probe = qcom_smd_probe, .probe = qcom_smd_probe,
.remove = qcom_smd_remove, .remove_new = qcom_smd_remove,
.driver = { .driver = {
.name = "qcom-smd", .name = "qcom-smd",
.of_match_table = qcom_smd_of_match, .of_match_table = qcom_smd_of_match,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment