fpga: altera-hps2fpga: 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/7a56558f7e5aa34bf0b21d22f9036a136a2b7322.1703006638.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>

diff --git a/drivers/fpga/altera-hps2fpga.c b/drivers/fpga/altera-hps2fpga.c
index 5786635032972ba60f7f4d78313e1212f298f59d..6f8e24be19c6df7a653bbe990f2441d07b3f14e3 100644 (file)
--- a/drivers/fpga/altera-hps2fpga.c
+++ b/drivers/fpga/altera-hps2fpga.c
@@ -191,7 +191,7 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
        return ret;
 }
 
-static int alt_fpga_bridge_remove(struct platform_device *pdev)
+static void alt_fpga_bridge_remove(struct platform_device *pdev)
 {
        struct fpga_bridge *bridge = platform_get_drvdata(pdev);
        struct altera_hps2fpga_data *priv = bridge->priv;
@@ -199,15 +199,13 @@ static int alt_fpga_bridge_remove(struct platform_device *pdev)
        fpga_bridge_unregister(bridge);
 
        clk_disable_unprepare(priv->clk);
-
-       return 0;
 }
 
 MODULE_DEVICE_TABLE(of, altera_fpga_of_match);
 
 static struct platform_driver alt_fpga_bridge_driver = {
        .probe = alt_fpga_bridge_probe,
-       .remove = alt_fpga_bridge_remove,
+       .remove_new = alt_fpga_bridge_remove,
        .driver = {
                .name   = "altera_hps2fpga_bridge",
                .of_match_table = of_match_ptr(altera_fpga_of_match),