From 11b982e950d2138e90bd120501df10a439006ff8 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 20 Jul 2021 18:07:49 +0200
Subject: [PATCH] media: cxd2880-spi: Fix a null pointer dereference on error handling path
Git-commit: 11b982e950d2138e90bd120501df10a439006ff8
Patch-mainline: v5.16-rc1
References: git-fixes

Currently the null pointer check on dvb_spi->vcc_supply is inverted and
this leads to only null values of the dvb_spi->vcc_supply being passed
to the call of regulator_disable causing null pointer dereferences.
Fix this by only calling regulator_disable if dvb_spi->vcc_supply is
not null.

Addresses-coverity: ("Dereference after null check")

Fixes: dcb014582101 ("media: cxd2880-spi: Fix an error handling path")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/media/spi/cxd2880-spi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/spi/cxd2880-spi.c b/drivers/media/spi/cxd2880-spi.c
index b91a1e845b97..506f52c1af10 100644
--- a/drivers/media/spi/cxd2880-spi.c
+++ b/drivers/media/spi/cxd2880-spi.c
@@ -618,7 +618,7 @@ cxd2880_spi_probe(struct spi_device *spi)
 fail_attach:
 	dvb_unregister_adapter(&dvb_spi->adapter);
 fail_adapter:
-	if (!dvb_spi->vcc_supply)
+	if (dvb_spi->vcc_supply)
 		regulator_disable(dvb_spi->vcc_supply);
 fail_regulator:
 	kfree(dvb_spi);
-- 
2.26.2