diff options
Diffstat (limited to 'drivers/block/paride/pf.c')
| -rw-r--r-- | drivers/block/paride/pf.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c index 38b4d566b816..4457b494882a 100644 --- a/drivers/block/paride/pf.c +++ b/drivers/block/paride/pf.c @@ -300,20 +300,26 @@ static void __init pf_init_units(void) static int pf_open(struct block_device *bdev, fmode_t mode) { struct pf_unit *pf = bdev->bd_disk->private_data; + int ret; + lock_kernel(); pf_identify(pf); + ret = -ENODEV; if (pf->media_status == PF_NM) - return -ENODEV; + goto out; + ret = -EROFS; if ((pf->media_status == PF_RO) && (mode & FMODE_WRITE)) - return -EROFS; + goto out; + ret = 0; pf->access++; if (pf->removable) pf_lock(pf, 1); - - return 0; +out: + unlock_kernel(); + return ret; } static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo) @@ -354,14 +360,18 @@ static int pf_release(struct gendisk *disk, fmode_t mode) { struct pf_unit *pf = disk->private_data; - if (pf->access <= 0) + lock_kernel(); + if (pf->access <= 0) { + unlock_kernel(); return -EINVAL; + } pf->access--; if (!pf->access && pf->removable) pf_lock(pf, 0); + unlock_kernel(); return 0; } |