summaryrefslogtreecommitdiff
path: root/drivers/mtd/ubi
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/block.c42
-rw-r--r--drivers/mtd/ubi/build.c13
-rw-r--r--drivers/mtd/ubi/eba.c2
-rw-r--r--drivers/mtd/ubi/fastmap-wl.c2
-rw-r--r--drivers/mtd/ubi/fastmap.c5
-rw-r--r--drivers/mtd/ubi/vmt.c15
-rw-r--r--drivers/mtd/ubi/wl.c87
-rw-r--r--drivers/mtd/ubi/wl.h2
8 files changed, 116 insertions, 52 deletions
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index b210fdb31c98..b1fc28f63882 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -99,6 +99,8 @@ struct ubiblock {
/* Linked list of all ubiblock instances */
static LIST_HEAD(ubiblock_devices);
+static DEFINE_IDR(ubiblock_minor_idr);
+/* Protects ubiblock_devices and ubiblock_minor_idr */
static DEFINE_MUTEX(devices_mutex);
static int ubiblock_major;
@@ -351,8 +353,6 @@ static const struct blk_mq_ops ubiblock_mq_ops = {
.init_request = ubiblock_init_request,
};
-static DEFINE_IDR(ubiblock_minor_idr);
-
int ubiblock_create(struct ubi_volume_info *vi)
{
struct ubiblock *dev;
@@ -365,14 +365,15 @@ int ubiblock_create(struct ubi_volume_info *vi)
/* Check that the volume isn't already handled */
mutex_lock(&devices_mutex);
if (find_dev_nolock(vi->ubi_num, vi->vol_id)) {
- mutex_unlock(&devices_mutex);
- return -EEXIST;
+ ret = -EEXIST;
+ goto out_unlock;
}
- mutex_unlock(&devices_mutex);
dev = kzalloc(sizeof(struct ubiblock), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
+ if (!dev) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
mutex_init(&dev->dev_mutex);
@@ -437,14 +438,13 @@ int ubiblock_create(struct ubi_volume_info *vi)
goto out_free_queue;
}
- mutex_lock(&devices_mutex);
list_add_tail(&dev->list, &ubiblock_devices);
- mutex_unlock(&devices_mutex);
/* Must be the last step: anyone can call file ops from now on */
add_disk(dev->gd);
dev_info(disk_to_dev(dev->gd), "created from ubi%d:%d(%s)",
dev->ubi_num, dev->vol_id, vi->name);
+ mutex_unlock(&devices_mutex);
return 0;
out_free_queue:
@@ -457,6 +457,8 @@ out_put_disk:
put_disk(dev->gd);
out_free_dev:
kfree(dev);
+out_unlock:
+ mutex_unlock(&devices_mutex);
return ret;
}
@@ -478,30 +480,36 @@ static void ubiblock_cleanup(struct ubiblock *dev)
int ubiblock_remove(struct ubi_volume_info *vi)
{
struct ubiblock *dev;
+ int ret;
mutex_lock(&devices_mutex);
dev = find_dev_nolock(vi->ubi_num, vi->vol_id);
if (!dev) {
- mutex_unlock(&devices_mutex);
- return -ENODEV;
+ ret = -ENODEV;
+ goto out_unlock;
}
/* Found a device, let's lock it so we can check if it's busy */
mutex_lock(&dev->dev_mutex);
if (dev->refcnt > 0) {
- mutex_unlock(&dev->dev_mutex);
- mutex_unlock(&devices_mutex);
- return -EBUSY;
+ ret = -EBUSY;
+ goto out_unlock_dev;
}
/* Remove from device list */
list_del(&dev->list);
- mutex_unlock(&devices_mutex);
-
ubiblock_cleanup(dev);
mutex_unlock(&dev->dev_mutex);
+ mutex_unlock(&devices_mutex);
+
kfree(dev);
return 0;
+
+out_unlock_dev:
+ mutex_unlock(&dev->dev_mutex);
+out_unlock:
+ mutex_unlock(&devices_mutex);
+ return ret;
}
static int ubiblock_resize(struct ubi_volume_info *vi)
@@ -630,6 +638,7 @@ static void ubiblock_remove_all(void)
struct ubiblock *next;
struct ubiblock *dev;
+ mutex_lock(&devices_mutex);
list_for_each_entry_safe(dev, next, &ubiblock_devices, list) {
/* The module is being forcefully removed */
WARN_ON(dev->desc);
@@ -638,6 +647,7 @@ static void ubiblock_remove_all(void)
ubiblock_cleanup(dev);
kfree(dev);
}
+ mutex_unlock(&devices_mutex);
}
int __init ubiblock_init(void)
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 136ce05d2328..e941395de3ae 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -535,8 +535,17 @@ static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
int limit, device_pebs;
uint64_t device_size;
- if (!max_beb_per1024)
- return 0;
+ if (!max_beb_per1024) {
+ /*
+ * Since max_beb_per1024 has not been set by the user in either
+ * the cmdline or Kconfig, use mtd_max_bad_blocks to set the
+ * limit if it is supported by the device.
+ */
+ limit = mtd_max_bad_blocks(ubi->mtd, 0, ubi->mtd->size);
+ if (limit < 0)
+ return 0;
+ return limit;
+ }
/*
* Here we are using size of the entire flash chip and
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 388e46be6ad9..250e30fac61b 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -384,7 +384,7 @@ static int leb_write_lock(struct ubi_device *ubi, int vol_id, int lnum)
}
/**
- * leb_write_lock - lock logical eraseblock for writing.
+ * leb_write_trylock - try to lock logical eraseblock for writing.
* @ubi: UBI device description object
* @vol_id: volume ID
* @lnum: logical eraseblock number
diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index 4f0bd6b4422a..590d967011bb 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -66,7 +66,7 @@ static void return_unused_pool_pebs(struct ubi_device *ubi,
}
}
-static int anchor_pebs_avalible(struct rb_root *root)
+static int anchor_pebs_available(struct rb_root *root)
{
struct rb_node *p;
struct ubi_wl_entry *e;
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 5a832bc79b1b..91705962ba73 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -214,9 +214,8 @@ static void assign_aeb_to_av(struct ubi_attach_info *ai,
struct ubi_ainf_volume *av)
{
struct ubi_ainf_peb *tmp_aeb;
- struct rb_node **p = &ai->volumes.rb_node, *parent = NULL;
+ struct rb_node **p = &av->root.rb_node, *parent = NULL;
- p = &av->root.rb_node;
while (*p) {
parent = *p;
@@ -1063,7 +1062,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
if (!e) {
while (i--)
- kfree(fm->e[i]);
+ kmem_cache_free(ubi_wl_entry_slab, fm->e[i]);
ret = -ENOMEM;
goto free_hdr;
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 85237cf661f9..3fd8d7ff7a02 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -270,6 +270,12 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
vol->last_eb_bytes = vol->usable_leb_size;
}
+ /* Make volume "available" before it becomes accessible via sysfs */
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = vol;
+ ubi->vol_count += 1;
+ spin_unlock(&ubi->volumes_lock);
+
/* Register character device for the volume */
cdev_init(&vol->cdev, &ubi_vol_cdev_operations);
vol->cdev.owner = THIS_MODULE;
@@ -298,11 +304,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
if (err)
goto out_sysfs;
- spin_lock(&ubi->volumes_lock);
- ubi->volumes[vol_id] = vol;
- ubi->vol_count += 1;
- spin_unlock(&ubi->volumes_lock);
-
ubi_volume_notify(ubi, vol, UBI_VOLUME_ADDED);
self_check_volumes(ubi);
return err;
@@ -315,6 +316,10 @@ out_sysfs:
*/
cdev_device_del(&vol->cdev, &vol->dev);
out_mapping:
+ spin_lock(&ubi->volumes_lock);
+ ubi->volumes[vol_id] = NULL;
+ ubi->vol_count -= 1;
+ spin_unlock(&ubi->volumes_lock);
ubi_eba_destroy_table(eba_tbl);
out_acc:
spin_lock(&ubi->volumes_lock);
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index b5b8cd6f481c..2052a647220e 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -692,7 +692,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
#ifdef CONFIG_MTD_UBI_FASTMAP
/* Check whether we need to produce an anchor PEB */
if (!anchor)
- anchor = !anchor_pebs_avalible(&ubi->free);
+ anchor = !anchor_pebs_available(&ubi->free);
if (anchor) {
e1 = find_anchor_wl_entry(&ubi->used);
@@ -1529,6 +1529,46 @@ static void shutdown_work(struct ubi_device *ubi)
}
/**
+ * erase_aeb - erase a PEB given in UBI attach info PEB
+ * @ubi: UBI device description object
+ * @aeb: UBI attach info PEB
+ * @sync: If true, erase synchronously. Otherwise schedule for erasure
+ */
+static int erase_aeb(struct ubi_device *ubi, struct ubi_ainf_peb *aeb, bool sync)
+{
+ struct ubi_wl_entry *e;
+ int err;
+
+ e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
+ if (!e)
+ return -ENOMEM;
+
+ e->pnum = aeb->pnum;
+ e->ec = aeb->ec;
+ ubi->lookuptbl[e->pnum] = e;
+
+ if (sync) {
+ err = sync_erase(ubi, e, false);
+ if (err)
+ goto out_free;
+
+ wl_tree_add(e, &ubi->free);
+ ubi->free_count++;
+ } else {
+ err = schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0, false);
+ if (err)
+ goto out_free;
+ }
+
+ return 0;
+
+out_free:
+ wl_entry_destroy(ubi, e);
+
+ return err;
+}
+
+/**
* ubi_wl_init - initialize the WL sub-system using attaching information.
* @ubi: UBI device description object
* @ai: attaching information
@@ -1566,17 +1606,9 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
list_for_each_entry_safe(aeb, tmp, &ai->erase, u.list) {
cond_resched();
- e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
- if (!e)
- goto out_free;
-
- e->pnum = aeb->pnum;
- e->ec = aeb->ec;
- ubi->lookuptbl[e->pnum] = e;
- if (schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0, false)) {
- wl_entry_destroy(ubi, e);
+ err = erase_aeb(ubi, aeb, false);
+ if (err)
goto out_free;
- }
found_pebs++;
}
@@ -1585,8 +1617,10 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
cond_resched();
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
- if (!e)
+ if (!e) {
+ err = -ENOMEM;
goto out_free;
+ }
e->pnum = aeb->pnum;
e->ec = aeb->ec;
@@ -1605,8 +1639,10 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
cond_resched();
e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
- if (!e)
+ if (!e) {
+ err = -ENOMEM;
goto out_free;
+ }
e->pnum = aeb->pnum;
e->ec = aeb->ec;
@@ -1635,6 +1671,8 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
ubi_assert(!ubi->lookuptbl[e->pnum]);
ubi->lookuptbl[e->pnum] = e;
} else {
+ bool sync = false;
+
/*
* Usually old Fastmap PEBs are scheduled for erasure
* and we don't have to care about them but if we face
@@ -1644,18 +1682,21 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
if (ubi->lookuptbl[aeb->pnum])
continue;
- e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
- if (!e)
- goto out_free;
+ /*
+ * The fastmap update code might not find a free PEB for
+ * writing the fastmap anchor to and then reuses the
+ * current fastmap anchor PEB. When this PEB gets erased
+ * and a power cut happens before it is written again we
+ * must make sure that the fastmap attach code doesn't
+ * find any outdated fastmap anchors, hence we erase the
+ * outdated fastmap anchor PEBs synchronously here.
+ */
+ if (aeb->vol_id == UBI_FM_SB_VOLUME_ID)
+ sync = true;
- e->pnum = aeb->pnum;
- e->ec = aeb->ec;
- ubi_assert(!ubi->lookuptbl[e->pnum]);
- ubi->lookuptbl[e->pnum] = e;
- if (schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0, false)) {
- wl_entry_destroy(ubi, e);
+ err = erase_aeb(ubi, aeb, sync);
+ if (err)
goto out_free;
- }
}
found_pebs++;
diff --git a/drivers/mtd/ubi/wl.h b/drivers/mtd/ubi/wl.h
index 2aaa3f7f2ba9..a9e2d669acd8 100644
--- a/drivers/mtd/ubi/wl.h
+++ b/drivers/mtd/ubi/wl.h
@@ -2,7 +2,7 @@
#ifndef UBI_WL_H
#define UBI_WL_H
#ifdef CONFIG_MTD_UBI_FASTMAP
-static int anchor_pebs_avalible(struct rb_root *root);
+static int anchor_pebs_available(struct rb_root *root);
static void update_fastmap_work_fn(struct work_struct *wrk);
static struct ubi_wl_entry *find_anchor_wl_entry(struct rb_root *root);
static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 16:20:15 +0300