gspca: add sanity check for mandatory operations

Commit Message

Németh Márton Nov. 17, 2009, 6:47 a.m. UTC

None

Patch

diff -r 182b5f8fa160 linux/drivers/media/video/gspca/gspca.c
--- a/linux/drivers/media/video/gspca/gspca.c	Sun Nov 15 10:05:30 2009 +0100
+++ b/linux/drivers/media/video/gspca/gspca.c	Tue Nov 17 07:42:34 2009 +0100
@@ -2035,6 +2035,12 @@ 
 		return -ENODEV;
 	}

+	/* check for mandatory operations */
+	BUG_ON(!sd_desc->config);
+	BUG_ON(!sd_desc->init);
+	BUG_ON(!sd_desc->start);
+	BUG_ON(!sd_desc->pkt_scan);
+
 	/* create the device */
 	if (dev_size < sizeof *gspca_dev)
 		dev_size = sizeof *gspca_dev;