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-rw-r--r--drivers/mtd/ubi/build.c2
-rw-r--r--drivers/mtd/ubi/kapi.c11
-rw-r--r--drivers/mtd/ubi/ubi.h5
-rw-r--r--drivers/mtd/ubi/upd.c4
-rw-r--r--drivers/mtd/ubi/vmt.c22
-rw-r--r--drivers/mtd/ubi/vtbl.c13
6 files changed, 34 insertions, 23 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 5d00364d4a4a..61225f493f6d 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -264,7 +264,7 @@ static int uif_init(struct ubi_device *ubi)
int i, err;
dev_t dev;
- mutex_init(&ubi->vtbl_mutex);
+ mutex_init(&ubi->volumes_mutex);
spin_lock_init(&ubi->volumes_lock);
sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index c2fafe6fb2da..8e15002a36c3 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -162,15 +162,16 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
desc->mode = mode;
/*
- * To prevent simultaneous checks of the same volume we use @vtbl_mutex,
- * although it is not the purpose it was introduced for.
+ * To prevent simultaneous checks of the same volume we use
+ * @volumes_mutex, although it is not the purpose it was introduced
+ * for.
*/
- mutex_lock(&ubi->vtbl_mutex);
+ mutex_lock(&ubi->volumes_mutex);
if (!vol->checked) {
/* This is the first open - check the volume */
err = ubi_check_volume(ubi, vol_id);
if (err < 0) {
- mutex_unlock(&ubi->vtbl_mutex);
+ mutex_unlock(&ubi->volumes_mutex);
ubi_close_volume(desc);
return ERR_PTR(err);
}
@@ -181,7 +182,7 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
}
vol->checked = 1;
}
- mutex_unlock(&ubi->vtbl_mutex);
+ mutex_unlock(&ubi->volumes_mutex);
return desc;
out_unlock:
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 0a3a803dd22f..69cbee3be7a4 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -255,7 +255,8 @@ struct ubi_wl_entry;
* @vtbl_slots: how many slots are available in the volume table
* @vtbl_size: size of the volume table in bytes
* @vtbl: in-RAM volume table copy
- * @vtbl_mutex: protects on-flash volume table
+ * @volumes_mutex: protects on-flash volume table and serializes volume
+ * changes, like creation, deletion, update, resize
*
* @max_ec: current highest erase counter value
* @mean_ec: current mean erase counter value
@@ -333,7 +334,7 @@ struct ubi_device {
int vtbl_slots;
int vtbl_size;
struct ubi_vtbl_record *vtbl;
- struct mutex vtbl_mutex;
+ struct mutex volumes_mutex;
int max_ec;
int mean_ec;
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
index a95dcaa4a0c2..e32b04d2e048 100644
--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -67,7 +67,9 @@ static int set_update_marker(struct ubi_device *ubi, int vol_id)
memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record));
vtbl_rec.upd_marker = 1;
+ mutex_lock(&ubi->volumes_mutex);
err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+ mutex_unlock(&ubi->volumes_mutex);
vol->upd_marker = 1;
return err;
}
@@ -106,7 +108,9 @@ static int clear_update_marker(struct ubi_device *ubi, int vol_id, long long byt
vol->last_eb_bytes = vol->usable_leb_size;
}
+ mutex_lock(&ubi->volumes_mutex);
err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+ mutex_unlock(&ubi->volumes_mutex);
vol->upd_marker = 0;
return err;
}
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index d2d12deead5c..ec2dd3c65c43 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -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
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index 3349c281bf9e..5879fdb3e6d5 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -89,7 +89,7 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
struct ubi_volume *layout_vol;
ubi_assert(idx >= 0 && idx < ubi->vtbl_slots);
- layout_vol = ubi->volumes[vol_id2idx(UBI_LAYOUT_VOL_ID)];
+ layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOL_ID)];
if (!vtbl_rec)
vtbl_rec = &empty_vtbl_record;
@@ -98,24 +98,19 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
vtbl_rec->crc = cpu_to_be32(crc);
}
- mutex_lock(&ubi->vtbl_mutex);
memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record));
for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
err = ubi_eba_unmap_leb(ubi, layout_vol, i);
- if (err) {
- mutex_unlock(&ubi->vtbl_mutex);
+ if (err)
return err;
- }
+
err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
ubi->vtbl_size, UBI_LONGTERM);
- if (err) {
- mutex_unlock(&ubi->vtbl_mutex);
+ if (err)
return err;
- }
}
paranoid_vtbl_check(ubi);
- mutex_unlock(&ubi->vtbl_mutex);
return ubi_wl_flush(ubi);
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-08 02:23:09 +0000