Give each mtd device its own backing_dev_info instance.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Woodhouse <dwmw2@infradead.org>
---
drivers/mtd/mtdcore.c | 8 +++++---
include/linux/mtd/mtd.h | 2 ++
2 files changed, 7 insertions(+), 3 deletions(-)
Index: linux-2.6/drivers/mtd/mtdcore.c
===================================================================
--- linux-2.6.orig/drivers/mtd/mtdcore.c
+++ linux-2.6/drivers/mtd/mtdcore.c
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/mtd/compatmac.h>
#include <linux/proc_fs.h>
+#include <linux/backing-dev.h>
#include <linux/mtd/mtd.h>
#include "internal.h"
@@ -53,15 +54,16 @@ int add_mtd_device(struct mtd_info *mtd)
if (!mtd->backing_dev_info) {
switch (mtd->type) {
case MTD_RAM:
- mtd->backing_dev_info = &mtd_bdi_rw_mappable;
+ mtd->mtd_backing_dev_info = mtd_bdi_rw_mappable;
break;
case MTD_ROM:
- mtd->backing_dev_info = &mtd_bdi_ro_mappable;
+ mtd->mtd_backing_dev_info = mtd_bdi_ro_mappable;
break;
default:
- mtd->backing_dev_info = &mtd_bdi_unmappable;
+ mtd->mtd_backing_dev_info = mtd_bdi_unmappable;
break;
}
+ mtd->backing_dev_info = &mtd->mtd_backing_dev_info;
}
err = bdi_init(mtd->backing_dev_info);
if (err)
Index: linux-2.6/include/linux/mtd/mtd.h
===================================================================
--- linux-2.6.orig/include/linux/mtd/mtd.h
+++ linux-2.6/include/linux/mtd/mtd.h
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/uio.h>
#include <linux/notifier.h>
+#include <linux/backing-dev.h>
#include <linux/mtd/compatmac.h>
#include <mtd/mtd-abi.h>
@@ -154,6 +155,7 @@ struct mtd_info {
* - provides mmap capabilities
*/
struct backing_dev_info *backing_dev_info;
+ struct backing_dev_info mtd_backing_dev_info;
int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
--
-
