From 2cea8d74dc3a80bbc06aff6b6dcaceb806d563b4 Mon Sep 17 00:00:00 2001 From: Marcel Ziswiler Date: Wed, 19 Sep 2018 13:01:55 +0200 Subject: [PATCH] imx: mx7: fix potential overflow in imx_ddr_size() 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 Reviewed-by: Fabio Estevam --- 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 f19aeb8..9713835 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; } -- 2.7.4