[U-Boot] [PATCH] cmd: usb_mass_storage: add protection for block_dev

[Patrick Delaunay]

solve data abort for the command "ums 0 ubi 0"
because result of case blk_get_device_part_str() result is OK
but with block_dev = 0 when CONFIG_CMD_UBIFS is activate and
ubi volume is mounted

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 cmd/usb_mass_storage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/usb_mass_storage.c b/cmd/usb_mass_storage.c
index cfeecb7..c0563ca 100644
--- a/cmd/usb_mass_storage.c
+++ b/cmd/usb_mass_storage.c
@@ -85,7 +85,7 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
 			partnum = 0;
 
 		/* f_mass_storage.c assumes SECTOR_SIZE sectors */
-		if (block_dev->blksz != SECTOR_SIZE)
+		if (!block_dev || block_dev->blksz != SECTOR_SIZE)
 			goto cleanup;
 
 		ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
-- 
2.7.4