From 17e6b7bb84649ffcbec11b3e3e933294d8856462 Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Wed, 18 Sep 2013 10:17:39 +0800 Subject: [PATCH] ENGR00279980 ubi: attach: do not return -EINVAL if the mtd->numeraseregions is 1 If the master mtd does not have any slave mtd partitions, and its numeraseregions is one(only has one erease block), and we attach the master mtd with : ubiattach -m 0 -d 0 We will meet the error: ------------------------------------------------------- root@freescale ~$ ubiattach /dev/ubi_ctrl -m 0 -d 0 UBI: attaching mtd0 to ubi0 UBI error: io_init: multiple regions, not implemented ubiattach: error!: cannot attach mtd0 error 22 (Invalid argument) ------------------------------------------------------- In fact, if there is only one "erase block", we should not prevent the attach. This patch fixes it. Signed-off-by: Huang Shijie (cherry picked from commit 361cdc47fc4c4db31c5485560cdabd94f409bd81) (cherry picked from commit ebee7d74914fad3cf7223af84496811c9d2488a1) Signed-off-by: Vipul Kumar Signed-off-by: Han Xu --- drivers/mtd/ubi/build.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -573,7 +573,7 @@ static int io_init(struct ubi_device *ub dbg_gen("sizeof(struct ubi_ainf_peb) %zu", sizeof(struct ubi_ainf_peb)); dbg_gen("sizeof(struct ubi_wl_entry) %zu", sizeof(struct ubi_wl_entry)); - if (ubi->mtd->numeraseregions != 0) { + if (ubi->mtd->numeraseregions > 1) { /* * Some flashes have several erase regions. Different regions * may have different eraseblock size and other