linux-kernel - [PATCH 05/15] UBI: Fastmap: Amend locking

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Date:	Thu, 21 Jun 2012 23:49:58 +0200
From:	Richard Weinberger <richard@....at>
To:	linux-mtd@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, adrian.hunter@...el.com,
	Heinz.Egger@...utronix.de, thomas.wucher@...utronix.de,
	shmulik.ladkani@...il.com, tglx@...utronix.de,
	tim.bird@...sony.com, Marius.Mazarel@...l.ro,
	artem.bityutskiy@...ux.intel.com,
	Richard Weinberger <richard@....at>
Subject: [PATCH 05/15] UBI: Fastmap: Amend locking

__ubi_wl_get_peb() gets called under wl_lock.
So need to grab it again.

Signed-off-by: Richard Weinberger <richard@....at>
---
 drivers/mtd/ubi/wl.c |    5 -----
 1 files changed, 0 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index ec0a954..e014f7e 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -255,7 +255,6 @@ static int produce_free_peb(struct ubi_device *ubi)
 {
 	int err;
 
-	spin_lock(&ubi->wl_lock);
 	while (!ubi->free.rb_node) {
 		spin_unlock(&ubi->wl_lock);
 
@@ -266,7 +265,6 @@ static int produce_free_peb(struct ubi_device *ubi)
 
 		spin_lock(&ubi->wl_lock);
 	}
-	spin_unlock(&ubi->wl_lock);
 
 	return 0;
 }
@@ -460,7 +458,6 @@ static int __ubi_wl_get_peb(struct ubi_device *ubi)
 	struct ubi_wl_entry *e;
 
 retry:
-	spin_lock(&ubi->wl_lock);
 	if (!ubi->free.rb_node) {
 		if (ubi->works_count == 0) {
 			ubi_assert(list_empty(&ubi->works));
@@ -468,7 +465,6 @@ retry:
 			spin_unlock(&ubi->wl_lock);
 			return -ENOSPC;
 		}
-		spin_unlock(&ubi->wl_lock);
 
 		err = produce_free_peb(ubi);
 		if (err < 0)
@@ -486,7 +482,6 @@ retry:
 	 */
 	rb_erase(&e->u.rb, &ubi->free);
 	dbg_wl("PEB %d EC %d", e->pnum, e->ec);
-	spin_unlock(&ubi->wl_lock);
 
 	err = ubi_self_check_all_ff(ubi, e->pnum, ubi->vid_hdr_aloffset,
 				    ubi->peb_size - ubi->vid_hdr_aloffset);
-- 
1.7.6.5

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