linux-kernel - [PATCH 5.19 0600/1157] mtd: spear_smi: Dont skip cleanup after mtd_device

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Message-Id: <20220815180503.666525013@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:59:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0600/1157] mtd: spear_smi: Dont skip cleanup after mtd_device_unregister() failed

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

[ Upstream commit 0057568b391488a5940635cbda562ea397bf4bdd ]

If mtd_device_unregister() fails (which it doesn't when used correctly),
the resources bound by the nand chip should be freed anyhow as returning
an error value doesn't prevent the device getting unbound.

Instead use WARN_ON on the return value similar to how other drivers do
it.

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

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/20220603210758.148493-7-u.kleine-koenig@pengutronix.de
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/devices/spear_smi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index 24073518587f..f6febe6662db 100644
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -1045,7 +1045,7 @@ static int spear_smi_remove(struct platform_device *pdev)
 {
 	struct spear_smi *dev;
 	struct spear_snor_flash *flash;
-	int ret, i;
+	int i;
 
 	dev = platform_get_drvdata(pdev);
 	if (!dev) {
@@ -1060,9 +1060,7 @@ static int spear_smi_remove(struct platform_device *pdev)
 			continue;
 
 		/* clean up mtd stuff */
-		ret = mtd_device_unregister(&flash->mtd);
-		if (ret)
-			dev_err(&pdev->dev, "error removing mtd\n");
+		WARN_ON(mtd_device_unregister(&flash->mtd));
 	}
 
 	clk_disable_unprepare(dev->clk);
-- 
2.35.1