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[PATCH] pktcdvd: Fix the logic in the pkt_writable_track function 

Fix the pkt_writable_track() function to make it work correctly for all types
of CD/DVD discs.

Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Peter Osterlund 2006-02-20 18:28:04 -08:00 committed by Linus Torvalds
parent 3b4828047d
commit ab863ec342
1 changed files with 15 additions and 13 deletions
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28
drivers/block/pktcdvd.c
View File

@ -1499,28 +1499,30 @@ static int pkt_set_write_settings(struct pktcdvd_device *pd)
/*
* 1 -- we can write to this track, 0 -- we can't
*/
static int pkt_writable_track(track_information *ti)
static int pkt_writable_track(struct pktcdvd_device *pd, track_information *ti)
{
/*
* only good for CD-RW at the moment, not DVD-RW
*/
switch (pd->mmc3_profile) {
case 0x1a: /* DVD+RW */
case 0x12: /* DVD-RAM */
/* The track is always writable on DVD+RW/DVD-RAM */
return 1;
default:
break;
}
/*
* FIXME: only for FP
*/
if (ti->fp == 0)
return 1;
if (!ti->packet || !ti->fp)
return 0;
/*
* "good" settings as per Mt Fuji.
*/
if (ti->rt == 0 && ti->blank == 0 && ti->packet == 1)
if (ti->rt == 0 && ti->blank == 0)
return 1;
if (ti->rt == 0 && ti->blank == 1 && ti->packet == 1)
if (ti->rt == 0 && ti->blank == 1)
return 1;
if (ti->rt == 1 && ti->blank == 0 && ti->packet == 1)
if (ti->rt == 1 && ti->blank == 0)
return 1;
printk("pktcdvd: bad state %d-%d-%d\n", ti->rt, ti->blank, ti->packet);
@ -1605,7 +1607,7 @@ static int pkt_probe_settings(struct pktcdvd_device *pd)
return ret;
}
if (!pkt_writable_track(&ti)) {
if (!pkt_writable_track(pd, &ti)) {
printk("pktcdvd: can't write to this track\n");
return -ENXIO;
}