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jffs2: Erase pending blocks in GC pass, avoid invalid -EIO return

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jffs2_garbage_collect_pass() would previously return -EAGAIN if it
couldn't find anything to garbage collect from, and there were blocks on
the erase_pending_list. If the blocks were actually in the process of
being erased, though, then they wouldn't be on that list. Check for
nr_erasing_blocks being non-zero instead.

Fix jffs2_reserve_space() to wait for the in-progress erases to
complete, when jffs2_garbage_collect_pass() returns -EAGAIN.

And fix jffs2_erase_succeeded() to actually wake up the erase_wait wq
that jffs2_reserve_space() is now using.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse
2010-05-19 16:37:13 +01:00
parent 9957abea31
commit 0717bf8411
3 changed files with 30 additions and 4 deletions
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15
fs/jffs2/gc.c
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@@ -214,6 +214,19 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
return ret;
}
/* If there are any blocks which need erasing, erase them now */
if (!list_empty(&c->erase_complete_list) ||
!list_empty(&c->erase_pending_list)) {
spin_unlock(&c->erase_completion_lock);
D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() erasing pending blocks\n"));
if (jffs2_erase_pending_blocks(c, 1)) {
mutex_unlock(&c->alloc_sem);
return 0;
}
D1(printk(KERN_DEBUG "No progress from erasing blocks; doing GC anyway\n"));
spin_lock(&c->erase_completion_lock);
}
/* First, work out which block we're garbage-collecting */
jeb = c->gcblock;
@@ -222,7 +235,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
if (!jeb) {
/* Couldn't find a free block. But maybe we can just erase one and make 'progress'? */
if (!list_empty(&c->erase_pending_list)) {
if (c->nr_erasing_blocks) {
spin_unlock(&c->erase_completion_lock);
mutex_unlock(&c->alloc_sem);
return -EAGAIN;