openwrtv3/target/linux/generic/patches-3.10/404-mtd-use-mtd_get_squashfs_len-in-split_squasfh.patch
Gabor Juhos 5dba0a237e kernel/3.1[02]: move MTD root device setup code to mtdcore
The current code only allows to automatically set
root device on MTD partitions. Move the code to MTD
core to allow to use it with all MTD devices.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 38643
2013-11-04 18:37:05 +00:00

69 lines
1.7 KiB
Diff

--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -33,6 +33,7 @@
#include <linux/err.h>
#include "mtdcore.h"
+#include "mtdsplit.h"
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
@@ -668,43 +669,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
return len;
}
-#define ROOTFS_SPLIT_NAME "rootfs_data"
-
-struct squashfs_super_block {
- __le32 s_magic;
- __le32 pad0[9];
- __le64 bytes_used;
-};
-
-
static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
{
- struct squashfs_super_block sb;
+ size_t squashfs_len;
int len, ret;
- ret = mtd_read(master, offset, sizeof(sb), &len, (void *) &sb);
- if (ret || (len != sizeof(sb))) {
- printk(KERN_ALERT "split_squashfs: error occured while reading "
- "from \"%s\"\n", master->name);
- return -EINVAL;
- }
-
- if (SQUASHFS_MAGIC != le32_to_cpu(sb.s_magic) ) {
- printk(KERN_ALERT "split_squashfs: no squashfs found in \"%s\"\n",
- master->name);
- *split_offset = 0;
- return 0;
- }
-
- if (le64_to_cpu((sb.bytes_used)) <= 0) {
- printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
- master->name);
- *split_offset = 0;
- return 0;
- }
+ ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
+ if (ret)
+ return ret;
- len = (u32) le64_to_cpu(sb.bytes_used);
- len = mtd_pad_erasesize(master, offset, len);
+ len = mtd_pad_erasesize(master, offset, squashfs_len);
*split_offset = offset + len;
return 0;
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -20,6 +20,7 @@ config MTD_ROOTFS_ROOT_DEV
config MTD_ROOTFS_SPLIT
bool "Automatically split 'rootfs' partition for squashfs"
+ select MTD_SPLIT
default y
config MTD_SPLIT_FIRMWARE