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kernel: mtdsplit_uimage: read more data to match Edimax needs 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44415 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Rafał Miłecki 2015-02-12 07:50:07 +00:00
parent 02c8dea914
commit 5254ae9391
1 changed files with 12 additions and 8 deletions
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20
target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c
View File

@ -20,6 +20,12 @@
#include "mtdsplit.h"
/*
* uimage_header itself is only 64B, but it may be prepended with another data.
* Currently the biggest size is for Edimax devices: 20B + 64B
*/
#define MAX_HEADER_LEN 84
#define IH_MAGIC 0x27051956 /* Image Magic Number */
#define IH_NMLEN 32 /* Image Name Length */
@ -48,15 +54,12 @@ struct uimage_header {
};
static int
read_uimage_header(struct mtd_info *mtd, size_t offset,
u_char *buf)
read_uimage_header(struct mtd_info *mtd, size_t offset, u_char *buf,
size_t header_len)
{
struct uimage_header *header;
size_t header_len;
size_t retlen;
int ret;
header_len = sizeof(*header);
ret = mtd_read(mtd, offset, header_len, &retlen, buf);
if (ret) {
pr_debug("read error in \"%s\"\n", mtd->name);
@ -84,7 +87,6 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
{
struct mtd_partition *parts;
u_char *buf;
struct uimage_header *header;
int nr_parts;
size_t offset;
size_t uimage_offset;
@ -99,7 +101,7 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
if (!parts)
return -ENOMEM;
buf = vmalloc(sizeof(*header));
buf = vmalloc(MAX_HEADER_LEN);
if (!buf) {
ret = -ENOMEM;
goto err_free_parts;
@ -107,9 +109,11 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
/* find uImage on erase block boundaries */
for (offset = 0; offset < master->size; offset += master->erasesize) {
struct uimage_header *header;
uimage_size = 0;
ret = read_uimage_header(master, offset, buf);
ret = read_uimage_header(master, offset, buf, sizeof(*buf));
if (ret)
continue;