diff options
Diffstat (limited to 'fs/jffs2/erase.c')
-rw-r--r-- | fs/jffs2/erase.c | 57 |
1 files changed, 51 insertions, 6 deletions
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c index 66e7c2f..a1db918 100644 --- a/fs/jffs2/erase.c +++ b/fs/jffs2/erase.c @@ -38,8 +38,8 @@ static void jffs2_erase_block(struct jffs2_sb_info *c, #ifdef __ECOS ret = jffs2_flash_erase(c, jeb); if (!ret) { - jffs2_erase_succeeded(c, jeb); - return; + jffs2_erase_succeeded(c, jeb); + return; } bad_offset = jeb->offset; #else /* Linux */ @@ -50,12 +50,14 @@ static void jffs2_erase_block(struct jffs2_sb_info *c, instr = kmalloc(sizeof(struct erase_info) + sizeof(struct erase_priv_struct), GFP_KERNEL); if (!instr) { printk(KERN_WARNING "kmalloc for struct erase_info in jffs2_erase_block failed. Refiling block for later\n"); + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); list_move(&jeb->list, &c->erase_pending_list); c->erasing_size -= c->sector_size; c->dirty_size += c->sector_size; jeb->dirty_size = c->sector_size; spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); return; } @@ -82,12 +84,14 @@ static void jffs2_erase_block(struct jffs2_sb_info *c, if (ret == -ENOMEM || ret == -EAGAIN) { /* Erase failed immediately. Refile it on the list */ D1(printk(KERN_DEBUG "Erase at 0x%08x failed: %d. Refiling on erase_pending_list\n", jeb->offset, ret)); + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); list_move(&jeb->list, &c->erase_pending_list); c->erasing_size -= c->sector_size; c->dirty_size += c->sector_size; jeb->dirty_size = c->sector_size; spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); return; } @@ -114,6 +118,7 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count) jeb = list_entry(c->erase_complete_list.next, struct jffs2_eraseblock, list); list_del(&jeb->list); spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); jffs2_mark_erased_block(c, jeb); if (!--count) { @@ -134,6 +139,7 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count) jffs2_free_jeb_node_refs(c, jeb); list_add(&jeb->list, &c->erasing_list); spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); jffs2_erase_block(c, jeb); @@ -142,23 +148,25 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count) } /* Be nice */ - cond_resched(); + yield(); + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); } spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); done: D1(printk(KERN_DEBUG "jffs2_erase_pending_blocks completed\n")); - - up(&c->erase_free_sem); } static void jffs2_erase_succeeded(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb) { D1(printk(KERN_DEBUG "Erase completed successfully at 0x%08x\n", jeb->offset)); + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); list_move_tail(&jeb->list, &c->erase_complete_list); spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); /* Ensure that kupdated calls us again to mark them clean */ jffs2_erase_pending_trigger(c); } @@ -172,22 +180,26 @@ static void jffs2_erase_failed(struct jffs2_sb_info *c, struct jffs2_eraseblock failed too many times. */ if (!jffs2_write_nand_badblock(c, jeb, bad_offset)) { /* We'd like to give this block another try. */ + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); list_move(&jeb->list, &c->erase_pending_list); c->erasing_size -= c->sector_size; c->dirty_size += c->sector_size; jeb->dirty_size = c->sector_size; spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); return; } } + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); c->erasing_size -= c->sector_size; c->bad_size += c->sector_size; list_move(&jeb->list, &c->bad_list); c->nr_erasing_blocks--; spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); wake_up(&c->erase_wait); } @@ -317,6 +329,33 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl size_t retlen; int ret = -EIO; + if (c->mtd->point) { + unsigned long *wordebuf; + + ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen, (unsigned char **)&ebuf); + if (ret) { + D1(printk(KERN_DEBUG "MTD point failed %d\n", ret)); + goto do_flash_read; + } + if (retlen < c->sector_size) { + /* Don't muck about if it won't let us point to the whole erase sector */ + D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen)); + c->mtd->unpoint(c->mtd, ebuf, jeb->offset, retlen); + goto do_flash_read; + } + wordebuf = ebuf-sizeof(*wordebuf); + retlen /= sizeof(*wordebuf); + do { + if (*++wordebuf != ~0) + break; + } while(--retlen); + c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size); + if (retlen) + printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08tx\n", + *wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf)); + return 0; + } + do_flash_read: ebuf = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!ebuf) { printk(KERN_WARNING "Failed to allocate page buffer for verifying erase at 0x%08x. Refiling\n", jeb->offset); @@ -362,7 +401,7 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb { size_t retlen; int ret; - uint32_t bad_offset; + uint32_t uninitialized_var(bad_offset); switch (jffs2_block_check_erase(c, jeb, &bad_offset)) { case -EAGAIN: goto refile; @@ -417,6 +456,7 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, c->cleanmarker_size, NULL); } + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); c->erasing_size -= c->sector_size; c->free_size += jeb->free_size; @@ -429,23 +469,28 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb c->nr_erasing_blocks--; c->nr_free_blocks++; spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); wake_up(&c->erase_wait); return; filebad: + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); /* Stick it on a list (any list) so erase_failed can take it right off again. Silly, but shouldn't happen often. */ list_add(&jeb->list, &c->erasing_list); spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); jffs2_erase_failed(c, jeb, bad_offset); return; refile: /* Stick it back on the list from whence it came and come back later */ jffs2_erase_pending_trigger(c); + down(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); list_add(&jeb->list, &c->erase_complete_list); spin_unlock(&c->erase_completion_lock); + up(&c->erase_free_sem); return; } |