[git:media_tree/fixes] media: iguanair: fix endpoint sanity check

[git:media_tree/fixes] media: iguanair: fix endpoint sanity check

[Mauro Carvalho Chehab]

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Subject: media: iguanair: fix endpoint sanity check
Author:  Johan Hovold <johan@kernel.org>
Date:    Fri Jan 3 17:35:13 2020 +0100

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: 26ff63137c45 ("[media] Add support for the IguanaWorks USB IR Transceiver")
Fixes: ab1cbdf159be ("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>

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

---

diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index 872d6441e512..a7deca1fefb7 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -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;