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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;