diff options
| author | Peter Osterlund <petero2@telia.com> | 2006-01-08 01:02:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:13:48 -0800 |
| commit | 8382bf2e72d16d0532e351299121ccd3bca0fdd8 (patch) | |
| tree | 4801ff017fdd06f34f81bf8b0ff37a716f1f6c50 | |
| parent | 97a41e26124330e41aa10ef88cd1711bc3d17460 (diff) | |
| download | op-kernel-dev-8382bf2e72d16d0532e351299121ccd3bca0fdd8.zip op-kernel-dev-8382bf2e72d16d0532e351299121ccd3bca0fdd8.tar.gz | |
[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.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index c0233ef..51b7a5c 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); } |
