x86/platform/olpc-xo1-sci: 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: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/63c9d1e6b07296916e4218c63f59a2dd6c6b6b16.1712732665.git.u.kleine-koenig@pengutronix.de

diff --git a/arch/x86/platform/olpc/olpc-xo1-sci.c b/arch/x86/platform/olpc/olpc-xo1-sci.c
index 89f25af4b3c339123938c2d7b9bf9409dfe00a6f..46d42ff6e18ab596b599d22abae85fc1736ec38e 100644 (file)
--- a/arch/x86/platform/olpc/olpc-xo1-sci.c
+++ b/arch/x86/platform/olpc/olpc-xo1-sci.c
@@ -598,7 +598,7 @@ err_ebook:
        return r;
 }
 
-static int xo1_sci_remove(struct platform_device *pdev)
+static void xo1_sci_remove(struct platform_device *pdev)
 {
        free_irq(sci_irq, pdev);
        cancel_work_sync(&sci_work);
@@ -608,7 +608,6 @@ static int xo1_sci_remove(struct platform_device *pdev)
        free_ebook_switch();
        free_power_button();
        acpi_base = 0;
-       return 0;
 }
 
 static struct platform_driver xo1_sci_driver = {
@@ -617,7 +616,7 @@ static struct platform_driver xo1_sci_driver = {
                .dev_groups = lid_groups,
        },
        .probe = xo1_sci_probe,
-       .remove = xo1_sci_remove,
+       .remove_new = xo1_sci_remove,
        .suspend = xo1_sci_suspend,
        .resume = xo1_sci_resume,
 };