From b4b7ff4b08e691656c9d77c758fc355833128ac0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 20 Jan 2016 14:01:31 -0300
Subject: Linux-libre 4.4-gnu
---
drivers/mtd/ubi/attach.c | 4 +---
drivers/mtd/ubi/cdev.c | 2 +-
drivers/mtd/ubi/debug.c | 2 +-
drivers/mtd/ubi/eba.c | 2 +-
drivers/mtd/ubi/fastmap-wl.c | 29 ++++++++++++++++++++++++
drivers/mtd/ubi/fastmap.c | 4 ++--
drivers/mtd/ubi/gluebi.c | 4 ++--
drivers/mtd/ubi/io.c | 2 +-
drivers/mtd/ubi/ubi-media.h | 2 +-
drivers/mtd/ubi/wl.c | 53 ++++++++++++++++++++++++--------------------
10 files changed, 68 insertions(+), 36 deletions(-)
(limited to 'drivers/mtd/ubi')
diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 68eea5bef..c1aaf0336 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -1209,9 +1209,7 @@ static void destroy_ai(struct ubi_attach_info *ai)
}
}
- if (ai->aeb_slab_cache)
- kmem_cache_destroy(ai->aeb_slab_cache);
-
+ kmem_cache_destroy(ai->aeb_slab_cache);
kfree(ai);
}
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index d16fccf79..54e056d3b 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -949,7 +949,7 @@ static long ubi_cdev_ioctl(struct file *file, unsigned int cmd,
if (!req) {
err = -ENOMEM;
break;
- };
+ }
err = copy_from_user(req, argp, sizeof(struct ubi_rnvol_req));
if (err) {
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index b077e43b5..c4cb15a30 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -236,7 +236,7 @@ int ubi_debugfs_init(void)
dfs_rootdir = debugfs_create_dir("ubi", NULL);
if (IS_ERR_OR_NULL(dfs_rootdir)) {
- int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir);
+ int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV;
pr_err("UBI error: cannot create \"ubi\" debugfs directory, error %d\n",
err);
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 51bca035c..5b9834cf2 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -1358,7 +1358,7 @@ int self_check_eba(struct ubi_device *ubi, struct ubi_attach_info *ai_fastmap,
continue;
ubi_err(ubi, "LEB:%i:%i is PEB:%i instead of %i!",
- vol->vol_id, i, fm_eba[i][j],
+ vol->vol_id, j, fm_eba[i][j],
scan_eba[i][j]);
ubi_assert(0);
}
diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index b2a665398..30d3999dd 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -171,6 +171,30 @@ void ubi_refill_pools(struct ubi_device *ubi)
spin_unlock(&ubi->wl_lock);
}
+/**
+ * produce_free_peb - produce a free physical eraseblock.
+ * @ubi: UBI device description object
+ *
+ * This function tries to make a free PEB by means of synchronous execution of
+ * pending works. This may be needed if, for example the background thread is
+ * disabled. Returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+static int produce_free_peb(struct ubi_device *ubi)
+{
+ int err;
+
+ while (!ubi->free.rb_node && ubi->works_count) {
+ dbg_wl("do one work synchronously");
+ err = do_work(ubi);
+
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
/**
* ubi_wl_get_peb - get a physical eraseblock.
* @ubi: UBI device description object
@@ -213,6 +237,11 @@ again:
}
retried = 1;
up_read(&ubi->fm_eba_sem);
+ ret = produce_free_peb(ubi);
+ if (ret < 0) {
+ down_read(&ubi->fm_eba_sem);
+ goto out;
+ }
goto again;
}
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 4aa2fd863..263b439e2 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -450,7 +450,7 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
* < 0 indicates an internal error.
*/
static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
- int *pebs, int pool_size, unsigned long long *max_sqnum,
+ __be32 *pebs, int pool_size, unsigned long long *max_sqnum,
struct list_head *free)
{
struct ubi_vid_hdr *vh;
@@ -775,7 +775,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) {
int pnum = be32_to_cpu(fm_eba->pnum[j]);
- if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0)
+ if (pnum < 0)
continue;
aeb = NULL;
diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c
index b93807b4c..cb7c075f2 100644
--- a/drivers/mtd/ubi/gluebi.c
+++ b/drivers/mtd/ubi/gluebi.c
@@ -112,8 +112,8 @@ static int gluebi_get_device(struct mtd_info *mtd)
* The MTD device is already referenced and this is just one
* more reference. MTD allows many users to open the same
* volume simultaneously and do not distinguish between
- * readers/writers/exclusive openers as UBI does. So we do not
- * open the UBI volume again - just increase the reference
+ * readers/writers/exclusive/meta openers as UBI does. So we do
+ * not open the UBI volume again - just increase the reference
* counter and return.
*/
gluebi->refcnt += 1;
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index 1fc23e48f..10cf3b549 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -1299,7 +1299,7 @@ static int self_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
if (err && err != UBI_IO_BITFLIPS && !mtd_is_eccerr(err))
goto exit;
- crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_HDR_SIZE_CRC);
+ crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_VID_HDR_SIZE_CRC);
hdr_crc = be32_to_cpu(vid_hdr->hdr_crc);
if (hdr_crc != crc) {
ubi_err(ubi, "bad VID header CRC at PEB %d, calculated %#08x, read %#08x",
diff --git a/drivers/mtd/ubi/ubi-media.h b/drivers/mtd/ubi/ubi-media.h
index d0d072e7c..22ed3f627 100644
--- a/drivers/mtd/ubi/ubi-media.h
+++ b/drivers/mtd/ubi/ubi-media.h
@@ -500,7 +500,7 @@ struct ubi_fm_volhdr {
/* struct ubi_fm_volhdr is followed by one struct ubi_fm_eba records */
/**
- * struct ubi_fm_eba - denotes an association beween a PEB and LEB
+ * struct ubi_fm_eba - denotes an association between a PEB and LEB
* @magic: EBA table magic number
* @reserved_pebs: number of table entries
* @pnum: PEB number of LEB (LEB is the index)
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index eb4489f90..56065632a 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -603,6 +603,7 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
return 0;
}
+static int __erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk);
/**
* do_sync_erase - run the erase worker synchronously.
* @ubi: UBI device description object
@@ -615,20 +616,16 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
static int do_sync_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
int vol_id, int lnum, int torture)
{
- struct ubi_work *wl_wrk;
+ struct ubi_work wl_wrk;
dbg_wl("sync erase of PEB %i", e->pnum);
- wl_wrk = kmalloc(sizeof(struct ubi_work), GFP_NOFS);
- if (!wl_wrk)
- return -ENOMEM;
-
- wl_wrk->e = e;
- wl_wrk->vol_id = vol_id;
- wl_wrk->lnum = lnum;
- wl_wrk->torture = torture;
+ wl_wrk.e = e;
+ wl_wrk.vol_id = vol_id;
+ wl_wrk.lnum = lnum;
+ wl_wrk.torture = torture;
- return erase_worker(ubi, wl_wrk, 0);
+ return __erase_worker(ubi, &wl_wrk);
}
/**
@@ -1014,7 +1011,7 @@ out_unlock:
}
/**
- * erase_worker - physical eraseblock erase worker function.
+ * __erase_worker - physical eraseblock erase worker function.
* @ubi: UBI device description object
* @wl_wrk: the work object
* @shutdown: non-zero if the worker has to free memory and exit
@@ -1025,8 +1022,7 @@ out_unlock:
* needed. Returns zero in case of success and a negative error code in case of
* failure.
*/
-static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
- int shutdown)
+static int __erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk)
{
struct ubi_wl_entry *e = wl_wrk->e;
int pnum = e->pnum;
@@ -1034,21 +1030,11 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
int lnum = wl_wrk->lnum;
int err, available_consumed = 0;
- if (shutdown) {
- dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec);
- kfree(wl_wrk);
- wl_entry_destroy(ubi, e);
- return 0;
- }
-
dbg_wl("erase PEB %d EC %d LEB %d:%d",
pnum, e->ec, wl_wrk->vol_id, wl_wrk->lnum);
err = sync_erase(ubi, e, wl_wrk->torture);
if (!err) {
- /* Fine, we've erased it successfully */
- kfree(wl_wrk);
-
spin_lock(&ubi->wl_lock);
wl_tree_add(e, &ubi->free);
ubi->free_count++;
@@ -1066,7 +1052,6 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
}
ubi_err(ubi, "failed to erase PEB %d, error %d", pnum, err);
- kfree(wl_wrk);
if (err == -EINTR || err == -ENOMEM || err == -EAGAIN ||
err == -EBUSY) {
@@ -1075,6 +1060,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
/* Re-schedule the LEB for erasure */
err1 = schedule_erase(ubi, e, vol_id, lnum, 0);
if (err1) {
+ wl_entry_destroy(ubi, e);
err = err1;
goto out_ro;
}
@@ -1150,6 +1136,25 @@ out_ro:
return err;
}
+static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
+ int shutdown)
+{
+ int ret;
+
+ if (shutdown) {
+ struct ubi_wl_entry *e = wl_wrk->e;
+
+ dbg_wl("cancel erasure of PEB %d EC %d", e->pnum, e->ec);
+ kfree(wl_wrk);
+ wl_entry_destroy(ubi, e);
+ return 0;
+ }
+
+ ret = __erase_worker(ubi, wl_wrk);
+ kfree(wl_wrk);
+ return ret;
+}
+
/**
* ubi_wl_put_peb - return a PEB to the wear-leveling sub-system.
* @ubi: UBI device description object
--
cgit v1.2.3-54-g00ecf