coresight: debug: 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.

Fixes: 965edae4e6a2 ("coresight: debug: Move ACPI support from AMBA driver to platform driver")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/fb3d7db82a2490ace41c51b16ad17ef61549e2f6.1713858615.git.u.kleine-koenig@pengutronix.de

diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
index 3263fc86cb6621b4bcefe442bb87d0736816e651..75962dae9aa1854abd84cf1b19b3d523038c0199 100644 (file)
--- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
+++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
@@ -716,18 +716,17 @@ static int debug_platform_probe(struct platform_device *pdev)
        return ret;
 }
 
-static int debug_platform_remove(struct platform_device *pdev)
+static void debug_platform_remove(struct platform_device *pdev)
 {
        struct debug_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
 
        if (WARN_ON(!drvdata))
-               return -ENODEV;
+               return;
 
        __debug_remove(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
        if (!IS_ERR_OR_NULL(drvdata->pclk))
                clk_put(drvdata->pclk);
-       return 0;
 }
 
 #ifdef CONFIG_ACPI
@@ -764,7 +763,7 @@ static const struct dev_pm_ops debug_dev_pm_ops = {
 
 static struct platform_driver debug_platform_driver = {
        .probe  = debug_platform_probe,
-       .remove = debug_platform_remove,
+       .remove_new = debug_platform_remove,
        .driver = {
                .name                   = "coresight-debug-platform",
                .acpi_match_table       = ACPI_PTR(debug_platform_ids),