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authorMike Isely <isely@pobox.com>2008-08-30 18:11:40 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 09:36:57 -0200
commitfe15f13679bf52bb5c8acb8b4847e6d73ba62c17 (patch)
tree2b64c12e10c0ca892e3cf9307059e5e682780316 /drivers/media/video/pvrusb2/pvrusb2-hdw.c
parent157afbc0de7d99cde39a5525b4c43acd4e02ef82 (diff)
V4L/DVB (8895): pvrusb2: Fail gracefully if an alien USB ID is used
The driver includes an internal table specifying additional information on a per device-type basis. This works great until somebody tries to run-time associate another USB ID with the driver. This change should hopefully allow the driver to fail gracefully under such a circumstance. Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-hdw.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index c8dedbab6e3..a7d636f3f9b 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -1915,7 +1915,7 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
const struct usb_device_id *devid)
{
unsigned int idx,cnt1,cnt2,m;
- struct pvr2_hdw *hdw;
+ struct pvr2_hdw *hdw = NULL;
int valid_std_mask;
struct pvr2_ctrl *cptr;
const struct pvr2_device_desc *hdw_desc;
@@ -1925,6 +1925,16 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
hdw_desc = (const struct pvr2_device_desc *)(devid->driver_info);
+ if (hdw_desc == NULL) {
+ pvr2_trace(PVR2_TRACE_INIT, "pvr2_hdw_create:"
+ " No device description pointer,"
+ " unable to continue.");
+ pvr2_trace(PVR2_TRACE_INIT, "If you have a new device type,"
+ " please contact Mike Isely <isely@pobox.com>"
+ " to get it included in the driver\n");
+ goto fail;
+ }
+
hdw = kzalloc(sizeof(*hdw),GFP_KERNEL);
pvr2_trace(PVR2_TRACE_INIT,"pvr2_hdw_create: hdw=%p, type \"%s\"",
hdw,hdw_desc->description);