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authorPeter Osterlund <petero2@telia.com>2006-01-08 01:02:17 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:48 -0800
commit8382bf2e72d16d0532e351299121ccd3bca0fdd8 (patch)
tree4801ff017fdd06f34f81bf8b0ff37a716f1f6c50
parent97a41e26124330e41aa10ef88cd1711bc3d17460 (diff)
[PATCH] pktcdvd: Use bd_claim to get exclusive access
Use bd_claim() when opening the cdrom device to prevent user space programs such as cdrecord, hald and kded from interfering with the burning process. Signed-off-by: Peter Osterlund <petero2@telia.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/block/pktcdvd.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index c0233efabeb..51b7a5c5b77 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1955,9 +1955,12 @@ static int pkt_open_dev(struct pktcdvd_device *pd, int write)
if ((ret = blkdev_get(pd->bdev, FMODE_READ, O_RDONLY)))
goto out;
+ if ((ret = bd_claim(pd->bdev, pd)))
+ goto out_putdev;
+
if ((ret = pkt_get_last_written(pd, &lba))) {
printk("pktcdvd: pkt_get_last_written failed\n");
- goto out_putdev;
+ goto out_unclaim;
}
set_capacity(pd->disk, lba << 2);
@@ -1967,7 +1970,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, int write)
q = bdev_get_queue(pd->bdev);
if (write) {
if ((ret = pkt_open_write(pd)))
- goto out_putdev;
+ goto out_unclaim;
/*
* Some CDRW drives can not handle writes larger than one packet,
* even if the size is a multiple of the packet size.
@@ -1982,13 +1985,15 @@ static int pkt_open_dev(struct pktcdvd_device *pd, int write)
}
if ((ret = pkt_set_segment_merging(pd, q)))
- goto out_putdev;
+ goto out_unclaim;
if (write)
printk("pktcdvd: %lukB available on disc\n", lba << 1);
return 0;
+out_unclaim:
+ bd_release(pd->bdev);
out_putdev:
blkdev_put(pd->bdev);
out:
@@ -2007,6 +2012,7 @@ static void pkt_release_dev(struct pktcdvd_device *pd, int flush)
pkt_lock_door(pd, 0);
pkt_set_speed(pd, MAX_SPEED, MAX_SPEED);
+ bd_release(pd->bdev);
blkdev_put(pd->bdev);
}