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| author | Ingo Molnar <mingo@elte.hu> | 2009-01-18 20:15:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-18 20:15:05 +0100 |
| commit | 4092762aebfe55c1f8e31440b80a053c2dbe519b (patch) | |
| tree | 8fb9fd14131194174c12daf5d8195afd3b62bc3e /drivers/block/nbd.c | |
| parent | trace: set max latency variable to zero on default (diff) | |
| parent | Linux 2.6.29-rc2 (diff) | |
| download | linux-4092762aebfe55c1f8e31440b80a053c2dbe519b.tar.xz linux-4092762aebfe55c1f8e31440b80a053c2dbe519b.zip | |
Merge branch 'tracing/ftrace'; commit 'v2.6.29-rc2' into tracing/core
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 7bcc1d8bc967..34f80fa6fed1 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -406,6 +406,7 @@ static int nbd_do_it(struct nbd_device *lo) ret = sysfs_create_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr); if (ret) { printk(KERN_ERR "nbd: sysfs_create_file failed!"); + lo->pid = 0; return ret; } @@ -413,6 +414,7 @@ static int nbd_do_it(struct nbd_device *lo) nbd_end_request(req); sysfs_remove_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr); + lo->pid = 0; return 0; } @@ -648,6 +650,8 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode, set_capacity(lo->disk, lo->bytesize >> 9); return 0; case NBD_DO_IT: + if (lo->pid) + return -EBUSY; if (!lo->file) return -EINVAL; thread = kthread_create(nbd_thread, lo, lo->disk->disk_name); |