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Commit 70dcc535 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'upstream-3.7-rc9' of git://git.infradead.org/linux-ubi 

Pull UBI changes from Artem Bityutskiy:
 "Fixes for 2 brown-paperbag bugs introduced this merge window by the
  fastmap code:

   1.  The UBI background thread got stuck when a bit-flip happened
       because free LEBs was not removed from the "free" tree when we
       started using it.
   2.  I/O debugging checks did not work because we called a sleeping
       function in atomic context."

* tag 'upstream-3.7-rc9' of git://git.infradead.org/linux-ubi:
  UBI: dont call ubi_self_check_all_ff() in __wl_get_peb()
  UBI: remove PEB from free tree in get_peb_for_wl()
parents ca50496e 894aef21

drivers/mtd/ubi/wl.c

+16 −10
Original line number Diff line number Diff line
@@ -498,7 +498,7 @@ struct ubi_wl_entry *ubi_wl_get_fm_peb(struct ubi_device *ubi, int anchor) 
 * @ubi: UBI device description object

 *

 * This function returns a physical eraseblock in case of success and a

 * negative error code in case of failure. Might sleep.

 * negative error code in case of failure.

 */

static int __wl_get_peb(struct ubi_device *ubi)

{
@@ -540,13 +540,6 @@ static int __wl_get_peb(struct ubi_device *ubi) 
	 * ubi_wl_get_peb() after removing e from the pool. */

	prot_queue_add(ubi, e);

#endif

	err = ubi_self_check_all_ff(ubi, e->pnum, ubi->vid_hdr_aloffset,

				    ubi->peb_size - ubi->vid_hdr_aloffset);

	if (err) {

		ubi_err("new PEB %d does not contain all 0xFF bytes", e->pnum);

		return err;

	}



	return e->pnum;

}
@@ -679,17 +672,30 @@ static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi) 
#else

static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi)

{

	return find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);

	struct ubi_wl_entry *e;



	e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);

	self_check_in_wl_tree(ubi, e, &ubi->free);

	rb_erase(&e->u.rb, &ubi->free);



	return e;

}



int ubi_wl_get_peb(struct ubi_device *ubi)

{

	int peb;

	int peb, err;



	spin_lock(&ubi->wl_lock);

	peb = __wl_get_peb(ubi);

	spin_unlock(&ubi->wl_lock);



	err = ubi_self_check_all_ff(ubi, peb, ubi->vid_hdr_aloffset,

				    ubi->peb_size - ubi->vid_hdr_aloffset);

	if (err) {

		ubi_err("new PEB %d does not contain all 0xFF bytes", peb);

		return err;

	}



	return peb;

}

#endif