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This pull request contains four bug fixes for UBI.

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Merge tag 'upstream-4.4-rc7' of git://git.infradead.org/linux-ubifs

Pull UBI bug fixes from Richard Weinberger:
 "This contains four bug fixes for UBI"

* tag 'upstream-4.4-rc7' of git://git.infradead.org/linux-ubifs:
  mtd: ubi: don't leak e if schedule_erase() fails
  mtd: ubi: fixup error correction in do_sync_erase()
  UBI: fix use of "VID" vs. "EC" in header self-check
  UBI: fix return error code
This commit is contained in:
Linus Torvalds 2015-12-26 19:55:16 -08:00
commit 3bef22eed9
3 changed files with 31 additions and 26 deletions
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2
drivers/mtd/ubi/debug.c
View File

@ -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);

2
drivers/mtd/ubi/io.c
View File

@ -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",

53
drivers/mtd/ubi/wl.c
View File

@ -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