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authorArtem B. Bityuckiy <dedekind@infradead.org>2005-04-05 13:51:58 +0100
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 13:09:29 +0200
commit894214d1a75745a283d5f1921125b3ad36d7ba26 (patch)
tree70dd3913dfb671871348878b1f2a4c30427e2d73 /fs
parent22c60f5fb7b8184a2d00a607f965b54c586fb40e (diff)
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[JFFS2] Fix race problems with wbuf.
Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/jffs2/erase.c8
-rw-r--r--fs/jffs2/wbuf.c12
2 files changed, 10 insertions, 10 deletions
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index bed6e1b8d82..bb47673c1e5 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: erase.c,v 1.74 2005/03/20 17:46:20 dedekind Exp $
+ * $Id: erase.c,v 1.75 2005/04/05 12:51:54 dedekind Exp $
*
*/
@@ -332,7 +332,11 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
bad_offset = ofs;
- ret = jffs2_flash_read(c, ofs, readlen, &retlen, ebuf);
+ if (!jffs2_is_writebuffered(c) || !jffs2_cleanmarker_oob(c))
+ ret = c->mtd->read(c->mtd, ofs, readlen, &retlen, ebuf);
+ else
+ ret = c->mtd->read_ecc(c->mtd, ofs, readlen, &retlen, ebuf, NULL, c->oobinfo);
+
if (ret) {
printk(KERN_WARNING "Read of newly-erased block at 0x%08x failed: %d. Putting on bad_list\n", ofs, ret);
goto bad;
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index 0a7676819df..996d922e503 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -9,7 +9,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.91 2005/03/18 09:58:06 dedekind Exp $
+ * $Id: wbuf.c,v 1.92 2005/04/05 12:51:54 dedekind Exp $
*
*/
@@ -873,6 +873,7 @@ int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *re
return c->mtd->read(c->mtd, ofs, len, retlen, buf);
/* Read flash */
+ down_read(&c->wbuf_sem);
if (jffs2_cleanmarker_oob(c))
ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
else
@@ -896,16 +897,11 @@ int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *re
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
- return ret;;
+ goto exit;
/* if we read in a different block, return */
if (SECTOR_ADDR(ofs) != SECTOR_ADDR(c->wbuf_ofs))
- return ret;
-
- /* Lock only if we have reason to believe wbuf contains relevant data,
- so that checking an erased block during wbuf recovery space allocation
- does not deadlock. */
- down_read(&c->wbuf_sem);
+ goto exit;
if (ofs >= c->wbuf_ofs) {
owbf = (ofs - c->wbuf_ofs); /* offset in write buffer */