[U-Boot] [PATCH 1/2] imx: mx7: fix potential overflow in imx_ddr_size()
Marcel Ziswiler
marcel at ziswiler.com
Wed Sep 19 11:01:55 UTC 2018
From: Marcel Ziswiler <marcel.ziswiler at toradex.com>
The imx_ddr_size() function may overflow as it is possible to kind of
over provision the DDR controller. Fix this by capping it to 2 GB which
is the maximum allowed size as per reference manual.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>
--
arch/arm/mach-imx/mx7/ddr.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/mach-imx/mx7/ddr.c b/arch/arm/mach-imx/mx7/ddr.c
index f19aeb8042..9713835bf2 100644
--- a/arch/arm/mach-imx/mx7/ddr.c
+++ b/arch/arm/mach-imx/mx7/ddr.c
@@ -196,5 +196,9 @@ unsigned int imx_ddr_size(void)
if (field_val <= 29)
bits++;
+ /* cap to max 2 GB */
+ if (bits > 31)
+ bits = 31;
+
return 1 << bits;
}
--
2.14.4
More information about the U-Boot
mailing list