[Patch] DVD bugfix in ide-cd.c

[Fredrik Vraalsen]

This is a small patch to Linux kernel 2.4.1 that fixes a problem with
DVD playback in OMS (Open Media System).  With the stock 2.4.1 kernel
OMS will only play up to a certain point on the DVD before it complains
about no more data left on input (basically read() returns 0).  This
patch reverts a change between 2.4.0 and 2.4.1.

diff -u --recursive --new-file v2.4.0/linux/drivers/ide/ide-cd.c linux/drivers/ide/ide-cd.c
--- v2.4.0/linux/drivers/ide/ide-cd.c	Tue Jan  2 16:59:17 2001
+++ linux/drivers/ide/ide-cd.c	Sun Jan 28 13:37:50 2001
@@ -1872,6 +1872,9 @@
 	   If it is, just return. */
 	(void) cdrom_check_status(drive, sense);
 
+	if (CDROM_STATE_FLAGS(drive)->toc_valid)
+		return 0;
+
 	/* First read just the header, so we know how long the TOC is. */
 	stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
 				    sizeof(struct atapi_toc_header), sense);

-- 
Fredrik Vraalsen  -  Research Assistant, Pablo research group
Department of Computer Science, University of Illinois at U-C