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[JFFS2] Fix dataflash support

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- assume wbuf may be of size which is not power of 2
- don't make strange assumption about not padding wbuf for DataFlash
- use wbuf = DataFlash page and eraseblock >= 8 Dataflash pages

From: Peter Menzebach <pm-mtd@mw-itcon.de>
Acked-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Artem B. Bityutskiy
2005-09-30 14:59:17 +01:00
committed by Thomas Gleixner
parent 83a368380e
commit daba5cc4bc
3 changed files with 40 additions and 22 deletions
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6
fs/jffs2/scan.c
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@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: scan.c,v 1.124 2005/09/21 13:05:22 dedekind Exp $
* $Id: scan.c,v 1.125 2005/09/30 13:59:13 dedekind Exp $
*
*/
#include <linux/kernel.h>
@@ -233,12 +233,12 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
c->nextblock->dirty_size = 0;
}
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size & (c->wbuf_pagesize-1))) {
if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size % c->wbuf_pagesize)) {
/* If we're going to start writing into a block which already
contains data, and the end of the data isn't page-aligned,
skip a little and align it. */
uint32_t skip = c->nextblock->free_size & (c->wbuf_pagesize-1);
uint32_t skip = c->nextblock->free_size % c->wbuf_pagesize;
D1(printk(KERN_DEBUG "jffs2_scan_medium(): Skipping %d bytes in nextblock to ensure page alignment\n",
skip));