[git:media_stage/master] media: ngene: Add dvb_ca_en50221_init return value check

[Hans Verkuil]

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Subject: media: ngene: Add dvb_ca_en50221_init return value check
Author:  Aleksandr Burakov <a.bura...@rosalinux.ru>
Date:    Fri Mar 1 14:15:53 2024 +0300

The return value of dvb_ca_en50221_init() is not checked here that may
cause undefined behavior in case of nonzero value return.

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

Fixes: 25aee3debe04 ("[media] Rename media/dvb as media/pci")
Signed-off-by: Aleksandr Burakov <a.bura...@rosalinux.ru>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>

 drivers/media/pci/ngene/ngene-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

---

diff --git a/drivers/media/pci/ngene/ngene-core.c 
b/drivers/media/pci/ngene/ngene-core.c
index 7481f553f959..24ec576dc3bf 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -1488,7 +1488,9 @@ static int init_channel(struct ngene_channel *chan)
        }
 
        if (dev->ci.en && (io & NGENE_IO_TSOUT)) {
-               dvb_ca_en50221_init(adapter, dev->ci.en, 0, 1);
+               ret = dvb_ca_en50221_init(adapter, dev->ci.en, 0, 1);
+               if (ret != 0)
+                       goto err;
                set_transfer(chan, 1);
                chan->dev->channel[2].DataFormatFlags = DF_SWAP32;
                set_transfer(&chan->dev->channel[2], 1);