diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 33205e4c1f5..a5b19944eca 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -355,15 +355,34 @@ static void kill_volumes(struct ubi_device *ubi) } /** + * free_user_volumes - free all user volumes. + * @ubi: UBI device description object + * + * Normally the volumes are freed at the release function of the volume device + * objects. However, on error paths the volumes have to be freed before the + * device objects have been initialized. + */ +static void free_user_volumes(struct ubi_device *ubi) +{ + int i; + + for (i = 0; i < ubi->vtbl_slots; i++) + if (ubi->volumes[i]) { + kfree(ubi->volumes[i]->eba_tbl); + kfree(ubi->volumes[i]); + } +} + +/** * uif_init - initialize user interfaces for an UBI device. * @ubi: UBI device description object * * This function returns zero in case of success and a negative error code in - * case of failure. + * case of failure. Note, this function destroys all volumes if it failes. */ static int uif_init(struct ubi_device *ubi) { - int i, err; + int i, err, do_free = 0; dev_t dev; sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num); @@ -410,10 +429,13 @@ static int uif_init(struct ubi_device *ubi) out_volumes: kill_volumes(ubi); + do_free = 0; out_sysfs: ubi_sysfs_close(ubi); cdev_del(&ubi->cdev); out_unreg: + if (do_free) + free_user_volumes(ubi); unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1); ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err); return err; @@ -722,7 +744,7 @@ static int autoresize(struct ubi_device *ubi, int vol_id) int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) { struct ubi_device *ubi; - int i, err; + int i, err, do_free = 1; /* * Check if we already have the same MTD device attached. @@ -822,7 +844,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) err = uif_init(ubi); if (err) - goto out_detach; + goto out_nofree; ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name); if (IS_ERR(ubi->bgt_thread)) { @@ -859,8 +881,12 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) out_uif: uif_close(ubi); +out_nofree: + do_free = 0; out_detach: ubi_wl_close(ubi); + if (do_free) + free_user_volumes(ubi); free_internal_volumes(ubi); vfree(ubi->vtbl); out_free: |