linux-kernel - [PATCH 3/3] media: tuners: tuner_simple: fix error code handling in simple_tuner

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Message-ID: <20240416114509.198069-3-r.smirnov@omp.ru>
Date: Tue, 16 Apr 2024 14:45:09 +0300
From: Roman Smirnov <r.smirnov@....ru>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, Hans Verkuil
	<hverkuil-cisco@...all.nl>, Jia-Ju Bai <baijiaju1990@...il.com>
CC: Roman Smirnov <r.smirnov@....ru>, <linux-media@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Sergey Shtylyov <s.shtylyov@....ru>,
	<lvc-project@...uxtesting.org>
Subject: [PATCH 3/3] media: tuners: tuner_simple: fix error code handling in simple_tuner_attach()

simple_tuner_attach() uses the hybrid_tuner_request_state() macro.
It may return the error code -ENOMEM, but the function handle
the value 0 instead.

Found by Linux Verification Center (linuxtesting.org) with Svace.

Fixes: b9302fa7ed97 ("media: tuners: fix error return code of hybrid_tuner_request_state()")
Signed-off-by: Roman Smirnov <r.smirnov@....ru>
---
 drivers/media/tuners/tuner-simple.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/tuners/tuner-simple.c b/drivers/media/tuners/tuner-simple.c
index 8fb186b25d6a..713ce2455910 100644
--- a/drivers/media/tuners/tuner-simple.c
+++ b/drivers/media/tuners/tuner-simple.c
@@ -1089,7 +1089,7 @@ struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
 					      i2c_adap, i2c_addr,
 					      "tuner-simple");
 	switch (instance) {
-	case 0:
+	case -ENOMEM:
 		mutex_unlock(&tuner_simple_list_mutex);
 		return NULL;
 	case 1:
-- 
2.34.1