diff options
| author |   Richard Weinberger <richard@nod.at> | 2016-08-24 14:36:13 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2016-10-02 22:49:54 +0200 |
| commit | 2365418879e9abf12ea9def7f9f3caf0dfa7ffb0 (patch) | |
| tree | 769be0c29f17a9c30342e5d07813d03390cb87ce /drivers/mtd | |
| parent | UBI: introduce the VID buffer concept (diff) | |
| download | linux-dev-2365418879e9abf12ea9def7f9f3caf0dfa7ffb0.tar.xz linux-dev-2365418879e9abf12ea9def7f9f3caf0dfa7ffb0.zip | |
ubi: Deal with interrupted erasures in WL
When Fastmap is used we can face here an -EBADMSG
since Fastmap cannot know about unmaps.
If the erasure was interrupted the PEB may show ECC
errors and UBI would go to ro-mode as it assumes
that the PEB was check during attach time, which is
not the case with Fastmap.
Cc: <stable@vger.kernel.org>
Fixes: dbb7d2a88d ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/wl.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 6351e8ae91aa..19206ad677b2 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -644,7 +644,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, int shutdown) { int err, scrubbing = 0, torture = 0, protect = 0, erroneous = 0; - int vol_id = -1, lnum = -1; + int erase = 0, keep = 0, vol_id = -1, lnum = -1; #ifdef CONFIG_MTD_UBI_FASTMAP int anchor = wrk->anchor; #endif @@ -783,6 +783,16 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, e1->pnum); scrubbing = 1; goto out_not_moved; + } else if (ubi->fast_attach && err == UBI_IO_BAD_HDR_EBADMSG) { + /* + * While a full scan would detect interrupted erasures + * at attach time we can face them here when attached from + * Fastmap. + */ + dbg_wl("PEB %d has ECC errors, maybe from an interrupted erasure", + e1->pnum); + erase = 1; + goto out_not_moved; } ubi_err(ubi, "error %d while reading VID header from PEB %d", @@ -818,6 +828,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, * Target PEB had bit-flips or write error - torture it. */ torture = 1; + keep = 1; goto out_not_moved; } @@ -904,7 +915,7 @@ out_not_moved: ubi->erroneous_peb_count += 1; } else if (scrubbing) wl_tree_add(e1, &ubi->scrub); - else + else if (keep) wl_tree_add(e1, &ubi->used); if (dst_leb_clean) { wl_tree_add(e2, &ubi->free); @@ -925,6 +936,12 @@ out_not_moved: goto out_ro; } + if (erase) { + err = do_sync_erase(ubi, e1, vol_id, lnum, 1); + if (err) + goto out_ro; + } + mutex_unlock(&ubi->move_mutex); return 0; |