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authorJean-Francois Moine <moinejf@free.fr>2009-04-21 13:57:31 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-06-16 18:20:54 -0300
commit30d35e49509345a3bee778e0cee8545cd70853e2 (patch)
treea6f3b9eebc7d339de0d543e9e9b3e53c01409db9
parent6929dc6b30dc3a6c9c411f677a11b866e8dd28aa (diff)
V4L/DVB (11711): gspca - main: Fix a crash when no bandwidth available
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>
-rw-r--r--drivers/media/video/gspca/gspca.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 873e9558040..efa4dd349f6 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -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;