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media: iguanair: fix endpoint sanity check

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Make sure to use the current alternate setting, which need not be the
first one by index, when verifying the endpoint descriptors and
initialising the URBs.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 26ff63137c ("[media] Add support for the IguanaWorks USB IR Transceiver")
Fixes: ab1cbdf159 ("media: iguanair: add sanity checks")
Cc: stable <stable@vger.kernel.org>     # 3.6
Cc: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Johan Hovold 2020-01-03 17:35:13 +01:00 committed by Mauro Carvalho Chehab
parent 334f6aaf75
commit 1b257870a7
1 changed files with 1 additions and 1 deletions
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drivers/media/rc/iguanair.c
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@ -413,7 +413,7 @@ static int iguanair_probe(struct usb_interface *intf,
int ret, pipein, pipeout;
struct usb_host_interface *idesc;
idesc = intf->altsetting;
idesc = intf->cur_altsetting;
if (idesc->desc.bNumEndpoints < 2)
return -ENODEV;