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UBI: some code re-structuring

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Minor code re-structuring and commentaries fixes to improve readability.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2008-12-05 12:23:48 +02:00
parent 4df581f3dc
commit 6a8f483f33
1 changed files with 23 additions and 16 deletions
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39
drivers/mtd/ubi/wl.c
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@ -359,19 +359,18 @@ static int in_wl_tree(struct ubi_wl_entry *e, struct rb_root *root)
* @ubi: UBI device description object
* @e: the physical eraseblock to add
* @pe: protection entry object to use
* @abs_ec: absolute erase counter value when this physical eraseblock has
* to be removed from the protection trees.
* @ec: for how many erase operations this PEB should be protected
*
* @wl->lock has to be locked.
*/
static void prot_tree_add(struct ubi_device *ubi, struct ubi_wl_entry *e,
struct ubi_wl_prot_entry *pe, int abs_ec)
struct ubi_wl_prot_entry *pe, int ec)
{
struct rb_node **p, *parent = NULL;
struct ubi_wl_prot_entry *pe1;
pe->e = e;
pe->abs_ec = ubi->abs_ec + abs_ec;
pe->abs_ec = ubi->abs_ec + ec;
p = &ubi->prot.pnum.rb_node;
while (*p) {
@ -739,7 +738,7 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
int cancel)
{
int err, put = 0, scrubbing = 0, protect = 0;
int err, put = 0, scrubbing = 0;
struct ubi_wl_prot_entry *uninitialized_var(pe);
struct ubi_wl_entry *e1, *e2;
struct ubi_vid_hdr *vid_hdr;
@ -864,17 +863,28 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
goto out_error;
}
protect = 1;
ubi_free_vid_hdr(ubi, vid_hdr);
spin_lock(&ubi->wl_lock);
prot_tree_add(ubi, e1, pe, U_PROTECTION);
ubi_assert(!ubi->move_to_put);
ubi->move_from = ubi->move_to = NULL;
ubi->wl_scheduled = 0;
spin_unlock(&ubi->wl_lock);
err = schedule_erase(ubi, e2, 0);
if (err)
goto out_error;
mutex_unlock(&ubi->move_mutex);
return 0;
}
/* The PEB has been successfully moved */
ubi_free_vid_hdr(ubi, vid_hdr);
if (scrubbing && !protect)
if (scrubbing)
ubi_msg("scrubbed PEB %d, data moved to PEB %d",
e1->pnum, e2->pnum);
spin_lock(&ubi->wl_lock);
if (protect)
prot_tree_add(ubi, e1, pe, protect);
if (!ubi->move_to_put)
wl_tree_add(e2, &ubi->used);
else
@ -883,6 +893,10 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
ubi->move_to_put = ubi->wl_scheduled = 0;
spin_unlock(&ubi->wl_lock);
err = schedule_erase(ubi, e1, 0);
if (err)
goto out_error;
if (put) {
/*
* Well, the target PEB was put meanwhile, schedule it for
@ -894,13 +908,6 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
goto out_error;
}
if (!protect) {
err = schedule_erase(ubi, e1, 0);
if (err)
goto out_error;
}
dbg_wl("done");
mutex_unlock(&ubi->move_mutex);
return 0;