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nvram: fix regression in finding NVRAM beginning

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The loop was giving up too early as it never expected NVRAM smaller
than 0x10000.

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45578 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
Rafał Miłecki 2015-04-24 14:28:57 +00:00
parent 31f0f77e55
commit 388ae4d9d1
2 changed files with 7 additions and 1 deletions
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7
package/utils/nvram/src/nvram.c
View File

@ -364,7 +364,12 @@ nvram_handle_t * nvram_open(const char *file, int rdonly)
if( mmap_area != MAP_FAILED )
{
for( i = 0; i <= ((nvram_part_size - NVRAM_SPACE) / sizeof(uint32_t)); i++ )
/*
* Start looking for NVRAM_MAGIC at beginning of MTD
* partition. Stop if there is less than NVRAM_MIN_SPACE
* to check, that was the lowest used size.
*/
for( i = 0; i <= ((nvram_part_size - NVRAM_MIN_SPACE) / sizeof(uint32_t)); i++ )
{
if( ((uint32_t *)mmap_area)[i] == NVRAM_MAGIC )
{

1
package/utils/nvram/src/nvram.h
View File

@ -113,6 +113,7 @@ char * nvram_find_staging(void);
#define NVRAM_ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
/* NVRAM constants */
#define NVRAM_MIN_SPACE 0x8000
#define NVRAM_SPACE 0x10000
#define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */
#define NVRAM_VERSION 1