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UBI: tweak volumes locking

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Transform vtbl_mutex to volumes_mutex - this just makes code
easier to understand.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy
2007-12-17 12:46:48 +02:00
parent 89b96b6929
commit cae0a77125
6 changed files with 34 additions and 23 deletions
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22
drivers/mtd/ubi/vmt.c
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@@ -201,8 +201,8 @@ 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 */
dbg_msg("search for vacant volume ID");
@@ -350,6 +350,7 @@ 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_gluebi:
@@ -365,6 +366,7 @@ out_acc:
ubi->volumes[vol_id] = NULL;
out_unlock:
spin_unlock(&ubi->volumes_lock);
mutex_unlock(&ubi->volumes_mutex);
kfree(vol);
ubi_err("cannot create volume %d, error %d", vol_id, err);
return err;
@@ -382,6 +384,7 @@ out_sysfs:
ubi->avail_pebs += vol->reserved_pebs;
ubi->volumes[vol_id] = NULL;
spin_unlock(&ubi->volumes_lock);
mutex_unlock(&ubi->volumes_mutex);
volume_sysfs_close(vol);
ubi_err("cannot create volume %d, error %d", vol_id, err);
return err;
@@ -408,18 +411,19 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
if (ubi->ro_mode)
return -EROFS;
mutex_lock(&ubi->volumes_mutex);
err = ubi_destroy_gluebi(vol);
if (err)
return err;
goto out;
err = ubi_change_vtbl_record(ubi, vol_id, NULL);
if (err)
return err;
goto out;
for (i = 0; i < vol->reserved_pebs; i++) {
err = ubi_eba_unmap_leb(ubi, vol, i);
if (err)
return err;
goto out;
}
spin_lock(&ubi->volumes_lock);
@@ -449,8 +453,13 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
spin_unlock(&ubi->volumes_lock);
paranoid_check_volumes(ubi);
mutex_unlock(&ubi->volumes_mutex);
module_put(THIS_MODULE);
return 0;
out:
mutex_unlock(&ubi->volumes_mutex);
return err;
}
/**
@@ -496,6 +505,7 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
new_mapping[i] = UBI_LEB_UNMAPPED;
/* Reserve physical eraseblocks */
mutex_lock(&ubi->volumes_mutex);
pebs = reserved_pebs - vol->reserved_pebs;
if (pebs > 0) {
spin_lock(&ubi->volumes_lock);
@@ -556,6 +566,7 @@ 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:
@@ -567,6 +578,7 @@ out_acc:
}
out_free:
kfree(new_mapping);
mutex_unlock(&ubi->volumes_mutex);
return err;
}
@@ -829,9 +841,7 @@ static void paranoid_check_volumes(struct ubi_device *ubi)
{
int i;
mutex_lock(&ubi->vtbl_mutex);
for (i = 0; i < ubi->vtbl_slots; i++)
paranoid_check_volume(ubi, i);
mutex_unlock(&ubi->vtbl_mutex);
}
#endif