fpga: dfl-fme-region: 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/13187db1642f81f04e55be0a26045f09ccc95d37.1703006638.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>

diff --git a/drivers/fpga/dfl-fme-region.c b/drivers/fpga/dfl-fme-region.c
index 4aebde0a7f1c35f308c4906931e050c886e079d1..71616f8b4982de143fed31bdcd42deddf8367813 100644 (file)
--- a/drivers/fpga/dfl-fme-region.c
+++ b/drivers/fpga/dfl-fme-region.c
@@ -61,15 +61,13 @@ static int fme_region_probe(struct platform_device *pdev)
        return ret;
 }
 
-static int fme_region_remove(struct platform_device *pdev)
+static void fme_region_remove(struct platform_device *pdev)
 {
        struct fpga_region *region = platform_get_drvdata(pdev);
        struct fpga_manager *mgr = region->mgr;
 
        fpga_region_unregister(region);
        fpga_mgr_put(mgr);
-
-       return 0;
 }
 
 static struct platform_driver fme_region_driver = {
@@ -77,7 +75,7 @@ static struct platform_driver fme_region_driver = {
                .name    = DFL_FPGA_FME_REGION,
        },
        .probe   = fme_region_probe,
-       .remove  = fme_region_remove,
+       .remove_new = fme_region_remove,
 };
 
 module_platform_driver(fme_region_driver);