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| author | Huang Shijie <b32955@freescale.com> | 2012-11-01 06:58:17 +0100 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> | 2012-11-15 18:50:30 +0100 |
| commit | 6f9f59ee2e254a7e997985d8eb708930da49245a (patch) | |
| tree | b2fe0de90ac6f12c33c9a281a4102df9afe5f08e /drivers/mtd/cmdlinepart.c | |
| parent | mtd: map: Fix compilation warning (diff) | |
| download | linux-6f9f59ee2e254a7e997985d8eb708930da49245a.tar.xz linux-6f9f59ee2e254a7e997985d8eb708930da49245a.zip | |
mtd: cmdlinepart: fix the overflow of big mtd partitions
When the kernel parses the following cmdline
#mtdparts=gpmi-nand:16m(boot),16m(kernel),1g(home),4g(test),-(usr)
for a big nand chip Micron MT29F64G08AFAAAWP(8GB), we got the following wrong
result:
.............................................
"mtd: partition size too small (0)"
.............................................
We can not get any partition.
The "4g(test)" partition triggers a overflow of the "size". The memparse()
returns 4g to the "size", but the size is "unsigned long" type, so a overflow
occurs, the "size" becomes zero in the end.
This patch changes the "size"/"offset" to "unsigned long long" type,
and replaces the UINT_MAX with ULLONG_MAX for macros SIZE_REMAINING and
OFFSET_CONTINUOUS.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd/cmdlinepart.c')
| -rw-r--r-- | drivers/mtd/cmdlinepart.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c index 4baab3bc6136..c533f27d863f 100644 --- a/drivers/mtd/cmdlinepart.c +++ b/drivers/mtd/cmdlinepart.c @@ -56,8 +56,8 @@ /* special size referring to all the remaining space in a partition */ -#define SIZE_REMAINING UINT_MAX -#define OFFSET_CONTINUOUS UINT_MAX +#define SIZE_REMAINING ULLONG_MAX +#define OFFSET_CONTINUOUS ULLONG_MAX struct cmdline_mtd_partition { struct cmdline_mtd_partition *next; @@ -89,7 +89,7 @@ static struct mtd_partition * newpart(char *s, int extra_mem_size) { struct mtd_partition *parts; - unsigned long size, offset = OFFSET_CONTINUOUS; + unsigned long long size, offset = OFFSET_CONTINUOUS; char *name; int name_len; unsigned char *extra_mem; @@ -104,7 +104,8 @@ static struct mtd_partition * newpart(char *s, } else { size = memparse(s, &s); if (size < PAGE_SIZE) { - printk(KERN_ERR ERRP "partition size too small (%lx)\n", size); + printk(KERN_ERR ERRP "partition size too small (%llx)\n", + size); return ERR_PTR(-EINVAL); } } @@ -296,7 +297,7 @@ static int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, struct mtd_part_parser_data *data) { - unsigned long offset; + unsigned long long offset; int i, err; struct cmdline_mtd_partition *part; const char *mtd_id = master->name; |