mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
1dbebd3256
This patch makes the 'mtd_writev()' function more usable and logical. We first teach it to fall-back to the 'default_mtd_writev()' function if the MTD driver does not define its own '->writev()' method. Then we make block2mtd and JFFS2 just 'mtd_writev()' instead of 'default_mtd_writev()' function. This means we can now stop exporting 'default_mtd_writev()' and instead, export 'mtd_writev()'. This is much cleaner and more logical, as well as allows us to get read of another direct 'mtd->writev' access in JFFS2. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
|
|
* JFFS2 -- Journalling Flash File System, Version 2.
|
|
*
|
|
* Copyright © 2001-2007 Red Hat, Inc.
|
|
*
|
|
* Created by David Woodhouse <dwmw2@infradead.org>
|
|
*
|
|
* For licensing information, see the file 'LICENCE' in this directory.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include "nodelist.h"
|
|
|
|
int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
|
|
unsigned long count, loff_t to, size_t *retlen)
|
|
{
|
|
if (!jffs2_is_writebuffered(c)) {
|
|
if (jffs2_sum_active()) {
|
|
int res;
|
|
res = jffs2_sum_add_kvec(c, vecs, count, (uint32_t) to);
|
|
if (res) {
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
|
|
return mtd_writev(c->mtd, vecs, count, to, retlen);
|
|
}
|
|
|
|
int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
int ret;
|
|
ret = mtd_write(c->mtd, ofs, len, retlen, buf);
|
|
|
|
if (jffs2_sum_active()) {
|
|
struct kvec vecs[1];
|
|
int res;
|
|
|
|
vecs[0].iov_base = (unsigned char *) buf;
|
|
vecs[0].iov_len = len;
|
|
|
|
res = jffs2_sum_add_kvec(c, vecs, 1, (uint32_t) ofs);
|
|
if (res) {
|
|
return res;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|