When a flash partition was positioned at the very top of a 32-bit memory map (eg located at 0xf8000000 with a size of 0x8000000) get_part_sector_size_nor() would incorrectly calculate the partition's ending address to 0x0 due to overflow. When the overflow occurred get_part_sector_size_nor() would falsely return a sector size of 0. A sector size of 0 results in subsequent jffs2 operations failing.

To workaround the overflow subtract 1 from calculated address of the partition endpoint.

Signed-off-by: Peter Tyser ptyser@xes-inc.com --- common/cmd_jffs2.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/common/cmd_jffs2.c b/common/cmd_jffs2.c index 0e7a6b0..27296dd 100644 --- a/common/cmd_jffs2.c +++ b/common/cmd_jffs2.c @@ -281,7 +281,7 @@ static inline u32 get_part_sector_size_nor(struct mtdids *id, struct part_info * flash = &flash_info[id->num];

start_phys = flash->start[0] + part->offset; - end_phys = start_phys + part->size; + end_phys = start_phys + part->size - 1;

for (i = 0; i < flash->sector_count; i++) { if (flash->start[i] >= end_phys)