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V4L/DVB (11711): gspca - main: Fix a crash when no bandwidth available

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When the bandwidth is not wide enough, the transfer endpoint may be set to
the one of the alternate setting 0. This one may be null and this causes a
divide by 0 oops.

Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-04-21 13:57:31 -03:00 committed by Mauro Carvalho Chehab
parent 6929dc6b30
commit 30d35e4950
1 changed files with 2 additions and 1 deletions
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3
drivers/media/video/gspca/gspca.c
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@ -449,7 +449,8 @@ static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
for (i = 0; i < alt->desc.bNumEndpoints; i++) {
ep = &alt->endpoint[i];
attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
if (attr == xfer)
if (attr == xfer
&& ep->desc.wMaxPacketSize != 0)
return ep;
}
return NULL;