[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>

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index fb08ae6..eb83197 100644 (file)
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -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;
        }