[PATCH 5.19 0603/1157] mtd: st_spi_fsm: Warn about failure to unregister mtd device

[Greg Kroah-Hartman]

From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>

[ Upstream commit cfa7847f150c4343903d8ff2cd219418c1768205 ]

mtd_device_unregister() shouldn't fail. Wail loudly if it does anyhow.

This matches how other drivers (e.g. nand/raw/nandsim.c) use
mtd_device_unregister().

By returning 0 in the platform remove callback a generic error message
by the device core is suppressed, nothing else changes.

This is a preparation for making platform remove callbacks return void.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20220607152458.232847-3-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/mtd/devices/st_spi_fsm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 52a799cae402..a5a4b612480c 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -2130,7 +2130,9 @@ static int stfsm_remove(struct platform_device *pdev)
 
 	clk_disable_unprepare(fsm->clk);
 
-	return mtd_device_unregister(&fsm->mtd);
+	WARN_ON(mtd_device_unregister(&fsm->mtd));
+
+	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.35.1