fpga: dfl-fme-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/438bb4797984fbfd0cef501010a64fa1e42ad9f4.1703006638.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>

diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index 3dcf990bd261f83369af5f4b4f52e3a8d2355c06..a2b5da0093dac7c0ee21022b0a9d5aff17850c64 100644 (file)
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -730,13 +730,11 @@ static int fme_probe(struct platform_device *pdev)
        return ret;
 }
 
-static int fme_remove(struct platform_device *pdev)
+static void fme_remove(struct platform_device *pdev)
 {
        dfl_fpga_dev_ops_unregister(pdev);
        dfl_fpga_dev_feature_uinit(pdev);
        fme_dev_destroy(pdev);
-
-       return 0;
 }
 
 static const struct attribute_group *fme_dev_groups[] = {
@@ -751,7 +749,7 @@ static struct platform_driver fme_driver = {
                .dev_groups = fme_dev_groups,
        },
        .probe   = fme_probe,
-       .remove  = fme_remove,
+       .remove_new = fme_remove,
 };
 
 module_platform_driver(fme_driver);