[U-Boot] [PATCH] part: check each variable for capability calculation

[Chang-Ming.Huang at freescale.com]

From: Jerry Huang <Chang-Ming.Huang at freescale.com>

In order to calculate the capability, we use the below expression to check:
((dev_desc->lba * dev_desc->blksz)>0L)
If the capability is greater than 4GB (e.g. 8GB = 8 * 1024 * 104 * 1024),
the result will overflow, the low 32bit may be zero.

Therefore, change to check each variable to fix this potential issue.

Signed-off-by: Jerry Huang <Chang-Ming.Huang at freescale.com>
---
 disk/part.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/disk/part.c b/disk/part.c
index 4646f68..7bdc90e 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -199,7 +199,7 @@ void dev_print (block_dev_desc_t *dev_desc)
 		break;
 	}
 	puts ("\n");
-	if ((dev_desc->lba * dev_desc->blksz)>0L) {
+	if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
 		ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
 		lbaint_t lba;
 
-- 
1.7.9.5