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media: gp8psk: initialize stats at power control logic

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commit d0ac1a26ed5943127cb0156148735f5f52a07075 upstream.

As reported on:
	https://lore.kernel.org/linux-media/20190627222020.45909-1-willemdebruijn.kernel@gmail.com/

if gp8psk_usb_in_op() returns an error, the status var is not
initialized. Yet, this var is used later on, in order to
identify:
	- if the device was already started;
	- if firmware has loaded;
	- if the LNBf was powered on.

Using status = 0 seems to ensure that everything will be
properly powered up.

So, instead of the proposed solution, let's just set
status = 0.

Reported-by: syzbot <syzkaller@googlegroups.com>
Reported-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mauro Carvalho Chehab 2020-11-27 07:40:21 +01:00 committed by Greg Kroah-Hartman
parent f290cffdf7
commit 2b56f16e34
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/dvb-usb/gp8psk.c
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@ -182,7 +182,7 @@ static int gp8psk_load_bcm4500fw(struct dvb_usb_device *d)
static int gp8psk_power_ctrl(struct dvb_usb_device *d, int onoff)
{
u8 status, buf;
u8 status = 0, buf;
int gp_product_id = le16_to_cpu(d->udev->descriptor.idProduct);
if (onoff) {