[PATCH 08/35] UBI: Split __wl_get_peb()

From: Richard Weinberger
Date: Wed Oct 29 2014 - 08:54:46 EST


Make it two functions, wl_get_wle() and wl_get_peb().
wl_get_peb() works exactly like __wl_get_peb() but wl_get_wle()
does not call produce_free_peb().
While refilling the fastmap user pool we cannot release ubi->wl_lock
as produce_free_peb() does.
Hence the fastmap logic uses now wl_get_wle().

Signed-off-by: Richard Weinberger <richard@xxxxxx>
---
drivers/mtd/ubi/wl.c | 48 +++++++++++++++++++++++++++---------------------
1 file changed, 27 insertions(+), 21 deletions(-)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 5f8d2ff..95bb12b 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -502,7 +502,30 @@ out:
* This function returns a physical eraseblock in case of success and a
* negative error code in case of failure.
*/
-static int __wl_get_peb(struct ubi_device *ubi)
+static struct ubi_wl_entry *wl_get_wle(struct ubi_device *ubi)
+{
+ struct ubi_wl_entry *e;
+
+ e = find_mean_wl_entry(ubi, &ubi->free);
+ if (!e) {
+ ubi_err("no free eraseblocks");
+ return NULL;
+ }
+
+ self_check_in_wl_tree(ubi, e, &ubi->free);
+
+ /*
+ * Move the physical eraseblock to the protection queue where it will
+ * be protected from being moved for some time.
+ */
+ rb_erase(&e->u.rb, &ubi->free);
+ ubi->free_count--;
+ dbg_wl("PEB %d EC %d", e->pnum, e->ec);
+
+ return e;
+}
+
+static int wl_get_peb(struct ubi_device *ubi)
{
int err;
struct ubi_wl_entry *e;
@@ -519,29 +542,12 @@ retry:
if (err < 0)
return err;
goto retry;
- }

- e = find_mean_wl_entry(ubi, &ubi->free);
- if (!e) {
- ubi_err("no free eraseblocks");
- return -ENOSPC;
}

- self_check_in_wl_tree(ubi, e, &ubi->free);
-
- /*
- * Move the physical eraseblock to the protection queue where it will
- * be protected from being moved for some time.
- */
- rb_erase(&e->u.rb, &ubi->free);
- ubi->free_count--;
- dbg_wl("PEB %d EC %d", e->pnum, e->ec);
-#ifndef CONFIG_MTD_UBI_FASTMAP
- /* We have to enqueue e only if fastmap is disabled,
- * is fastmap enabled prot_queue_add() will be called by
- * ubi_wl_get_peb() after removing e from the pool. */
+ e = wl_get_wle(ubi);
prot_queue_add(ubi, e);
-#endif
+
return e->pnum;
}

@@ -699,7 +705,7 @@ int ubi_wl_get_peb(struct ubi_device *ubi)
int peb, err;

spin_lock(&ubi->wl_lock);
- peb = __wl_get_peb(ubi);
+ peb = wl_get_peb(ubi);
spin_unlock(&ubi->wl_lock);

if (peb < 0)
--
1.8.4.5

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