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staging: rtl8712: fix interface sanity check 

Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

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: 2865d42c78 ("staging: r8712u: Add the new driver to the mainline kernel")
Cc: stable <stable@vger.kernel.org>     # 2.6.37
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210114751.5119-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-12-10 12:47:51 +01:00 committed by Greg Kroah-Hartman
parent 74ca34118a
commit c724f776f0
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rtl8712/usb_intf.c
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@ -247,7 +247,7 @@ static uint r8712_usb_dvobj_init(struct _adapter *padapter)
pdvobjpriv->padapter = padapter; pdvobjpriv->padapter = padapter;
padapter->eeprom_address_size = 6; padapter->eeprom_address_size = 6;
phost_iface = &pintf->altsetting[0]; phost_iface = pintf->cur_altsetting;
piface_desc = &phost_iface->desc; piface_desc = &phost_iface->desc;
pdvobjpriv->nr_endpoint = piface_desc->bNumEndpoints; pdvobjpriv->nr_endpoint = piface_desc->bNumEndpoints;
if (pusbd->speed == USB_SPEED_HIGH) { if (pusbd->speed == USB_SPEED_HIGH) {