5.15-stable review patch. If anyone has any objections, please let me know.
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From: Uwe Kleine-König u.kleine-koenig@pengutronix.de
[ Upstream commit 9ea02f7cc39d484d16e8a14f3713fefcd33407c0 ]
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 Reviewed-by: Geert Uytterhoeven geert@linux-m68k.org Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Stable-dep-of: 9b98a7d2e5f4 ("auxdisplay: hd44780: Fix an API misuse in hd44780.c") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/auxdisplay/hd44780.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/auxdisplay/hd44780.c b/drivers/auxdisplay/hd44780.c index d56a5d508ccd7..7ac0b1b1d5482 100644 --- a/drivers/auxdisplay/hd44780.c +++ b/drivers/auxdisplay/hd44780.c @@ -319,7 +319,7 @@ static int hd44780_probe(struct platform_device *pdev) return ret; }
-static int hd44780_remove(struct platform_device *pdev) +static void hd44780_remove(struct platform_device *pdev) { struct charlcd *lcd = platform_get_drvdata(pdev); struct hd44780_common *hdc = lcd->drvdata; @@ -329,7 +329,6 @@ static int hd44780_remove(struct platform_device *pdev) kfree(lcd->drvdata);
kfree(lcd); - return 0; }
static const struct of_device_id hd44780_of_match[] = { @@ -340,7 +339,7 @@ MODULE_DEVICE_TABLE(of, hd44780_of_match);
static struct platform_driver hd44780_driver = { .probe = hd44780_probe, - .remove = hd44780_remove, + .remove_new = hd44780_remove, .driver = { .name = "hd44780", .of_match_table = hd44780_of_match,