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imx: mx7: fix potential overflow in imx_ddr_size()

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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@toradex.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
This commit is contained in:
Marcel Ziswiler 2018-09-19 13:01:55 +02:00 committed by Stefano Babic
parent 780e31e93f
commit 2cea8d74dc
1 changed files with 4 additions and 0 deletions
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4
arch/arm/mach-imx/mx7/ddr.c
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@ -196,5 +196,9 @@ unsigned int imx_ddr_size(void)
if (field_val <= 29) if (field_val <= 29)
bits++; bits++;
/* cap to max 2 GB */
if (bits > 31)
bits = 31;
return 1 << bits; return 1 << bits;
} }