summaryrefslogtreecommitdiff
path: root/drivers/mtd/cmdlinepart.c
diff options
context:
space:
mode:
authorHuang Shijie <b32955@freescale.com>2012-11-01 13:58:17 +0800
committerArtem Bityutskiy <Artem.Bityutskiy@linux.intel.com>2012-11-15 19:50:30 +0200
commit6f9f59ee2e254a7e997985d8eb708930da49245a (patch)
treeb2fe0de90ac6f12c33c9a281a4102df9afe5f08e /drivers/mtd/cmdlinepart.c
parent3e9ce49e0ef95e22790a74720f0068696b2477c9 (diff)
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.c11
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;