fpga: dfl-afu-main: 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>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Link: https://lore.kernel.org/r/351a4508a2feeba05b2c311fa8596ca1ad77f467.1703006638.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>

diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index 7f621e96d3b8d8fb0dce599a07a4394b3a702895..c0a75ca360d697a9f736eb19a9f183f2b5143b90 100644 (file)
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -932,15 +932,13 @@ static int afu_probe(struct platform_device *pdev)
        return ret;
 }
 
-static int afu_remove(struct platform_device *pdev)
+static void afu_remove(struct platform_device *pdev)
 {
        dev_dbg(&pdev->dev, "%s\n", __func__);
 
        dfl_fpga_dev_ops_unregister(pdev);
        dfl_fpga_dev_feature_uinit(pdev);
        afu_dev_destroy(pdev);
-
-       return 0;
 }
 
 static const struct attribute_group *afu_dev_groups[] = {
@@ -956,7 +954,7 @@ static struct platform_driver afu_driver = {
                .dev_groups = afu_dev_groups,
        },
        .probe   = afu_probe,
-       .remove  = afu_remove,
+       .remove_new = afu_remove,
 };
 
 static int __init afu_init(void)