[U-Boot] [PATCH v2] Kirkwood: bugfix: DRAM size initialization

[Tanmay Upadhyay]

If start of any DRAM bank is greater than total DDR size, remaining
DDR banks' start address & size were left un-initialized in dram_init
function. This could break other functions who uses array
'gd->bd->bi_dram'. Kirkwood network driver is one example. This also
stops Linux kernel from booting.

v2 - Set start address also to 0. Without this Linux kernel couldn't
     boot up

Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay at einfochips.com>
---
 arch/arm/cpu/arm926ejs/kirkwood/dram.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/kirkwood/dram.c b/arch/arm/cpu/arm926ejs/kirkwood/dram.c
index 7439c87..a4344b8 100644
--- a/arch/arm/cpu/arm926ejs/kirkwood/dram.c
+++ b/arch/arm/cpu/arm926ejs/kirkwood/dram.c
@@ -81,6 +81,16 @@ int dram_init(void)
 		gd->ram_size += gd->bd->bi_dram[i].size;
 
 	}
+
+	for (; i < CONFIG_NR_DRAM_BANKS; i++) {
+		/* If above loop terminated prematurely, we need to set
+		 * remaining banks' start address & size as 0. Otherwise other
+		 * u-boot functions and Linux kernel gets wrong values which
+		 * could result in crash */
+		gd->bd->bi_dram[i].start = 0;
+		gd->bd->bi_dram[i].size = 0;
+	}
+
 	return 0;
 }
 
-- 
1.6.6.1