diff options
| -rw-r--r-- | drivers/mtd/ubi/cdev.c | 13 | ||||
| -rw-r--r-- | drivers/mtd/ubi/vmt.c | 20 |
2 files changed, 17 insertions, 16 deletions
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c index 35d34b675c7..22c15a388f2 100644 --- a/drivers/mtd/ubi/cdev.c +++ b/drivers/mtd/ubi/cdev.c @@ -605,7 +605,9 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, req.name[req.name_len] = '\0'; + mutex_lock(&ubi->volumes_mutex); err = ubi_create_volume(ubi, &req); + mutex_unlock(&ubi->volumes_mutex); if (err) break; @@ -634,11 +636,14 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, break; } + mutex_lock(&ubi->volumes_mutex); err = ubi_remove_volume(desc); + mutex_unlock(&ubi->volumes_mutex); + /* - * The volume is deleted, and the 'struct ubi_volume' object - * will be freed when 'ubi_close_volume()' will call - * 'put_device()'. + * The volume is deleted (unless an error occurred), and the + * 'struct ubi_volume' object will be freed when + * 'ubi_close_volume()' will call 'put_device()'. */ ubi_close_volume(desc); break; @@ -673,7 +678,9 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, pebs = !!do_div(tmp, desc->vol->usable_leb_size); pebs += tmp; + mutex_lock(&ubi->volumes_mutex); err = ubi_resize_volume(desc, pebs); + mutex_unlock(&ubi->volumes_mutex); ubi_close_volume(desc); break; } diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c index 18ef1e1da49..3ed63dc3738 100644 --- a/drivers/mtd/ubi/vmt.c +++ b/drivers/mtd/ubi/vmt.c @@ -189,7 +189,8 @@ static void volume_sysfs_close(struct ubi_volume *vol) * This function creates volume described by @req. If @req->vol_id id * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume * and saves it in @req->vol_id. Returns zero in case of success and a negative - * error code in case of failure. + * error code in case of failure. Note, the caller has to have the + * @ubi->volumes_mutex locked. */ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) { @@ -206,7 +207,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) if (!vol) return -ENOMEM; - mutex_lock(&ubi->volumes_mutex); spin_lock(&ubi->volumes_lock); if (vol_id == UBI_VOL_NUM_AUTO) { /* Find unused volume ID */ @@ -356,7 +356,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) spin_unlock(&ubi->volumes_lock); paranoid_check_volumes(ubi); - mutex_unlock(&ubi->volumes_mutex); return 0; out_sysfs: @@ -383,7 +382,6 @@ out_acc: ubi->avail_pebs += vol->reserved_pebs; out_unlock: spin_unlock(&ubi->volumes_lock); - mutex_unlock(&ubi->volumes_mutex); if (dont_free) put_device(&vol->dev); else @@ -398,7 +396,8 @@ out_unlock: * * This function removes volume described by @desc. The volume has to be opened * in "exclusive" mode. Returns zero in case of success and a negative error - * code in case of failure. + * code in case of failure. The caller has to have the @ubi->volumes_mutex + * locked. */ int ubi_remove_volume(struct ubi_volume_desc *desc) { @@ -413,7 +412,6 @@ int ubi_remove_volume(struct ubi_volume_desc *desc) if (ubi->ro_mode) return -EROFS; - mutex_lock(&ubi->volumes_mutex); spin_lock(&ubi->volumes_lock); if (vol->ref_count > 1) { /* @@ -461,7 +459,6 @@ int ubi_remove_volume(struct ubi_volume_desc *desc) spin_unlock(&ubi->volumes_lock); paranoid_check_volumes(ubi); - mutex_unlock(&ubi->volumes_mutex); return 0; out_err: @@ -470,7 +467,6 @@ out_err: ubi->volumes[vol_id] = vol; out_unlock: spin_unlock(&ubi->volumes_lock); - mutex_unlock(&ubi->volumes_mutex); return err; } @@ -479,8 +475,9 @@ out_unlock: * @desc: volume descriptor * @reserved_pebs: new size in physical eraseblocks * - * This function returns zero in case of success, and a negative error code in - * case of failure. + * This function re-sizes the volume and returns zero in case of success, and a + * negative error code in case of failure. The caller has to have the + * @ubi->volumes_mutex locked. */ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) { @@ -516,7 +513,6 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) for (i = 0; i < reserved_pebs; i++) new_mapping[i] = UBI_LEB_UNMAPPED; - mutex_lock(&ubi->volumes_mutex); spin_lock(&ubi->volumes_lock); if (vol->ref_count > 1) { spin_unlock(&ubi->volumes_lock); @@ -587,7 +583,6 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) } paranoid_check_volumes(ubi); - mutex_unlock(&ubi->volumes_mutex); return 0; out_acc: @@ -599,7 +594,6 @@ out_acc: } out_free: kfree(new_mapping); - mutex_unlock(&ubi->volumes_mutex); return err; } |