mtd: nand: vf610: check mtd_device_register() return code

vf610_nfc_probe() misses error handling of mtd_device_register().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c
index 1939503b0960..5d7a1f8f580f 100644
--- a/drivers/mtd/nand/vf610_nfc.c
+++ b/drivers/mtd/nand/vf610_nfc.c
@@ -767,8 +767,13 @@ static int vf610_nfc_probe(struct platform_device *pdev)
         platform_set_drvdata(pdev, mtd);
 
         /* Register device in MTD */
-        return mtd_device_register(mtd, NULL, 0);
+        err = mtd_device_register(mtd, NULL, 0);
+        if (err)
+                goto err_cleanup_nand;
+        return 0;
 
+err_cleanup_nand:
+        nand_cleanup(chip);
 err_disable_clk:
         clk_disable_unprepare(nfc->clk);
         return err;