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Date:   Fri, 22 Mar 2019 13:49:10 +0000
From:   Horia Geanta <>
To:     Iuliana Prodan <>,
        Herbert Xu <>,
        Aymen Sghaier <>
CC:     "David S. Miller" <>,
        "" <>,
        "" <>,
        dl-linux-imx <>
Subject: Re: [PATCH] crypto: caam - limit AXI pipeline to a depth of 1

On 3/22/2019 3:39 PM, Iuliana Prodan wrote:
> Some i.MX6 devices (imx6D, imx6Q, imx6DL, imx6S, imx6DP and imx6DQ) have
> an issue wherein AXI bus transactions may not occur in the correct order.
> This isn't a problem running single descriptors, but can be if running
> multiple concurrent descriptors. Reworking the CAAM driver to throttle
> to single requests is impractical, so this patch limits the AXI pipeline
> to a depth of one (from a default of 4) to preclude this situation from
> occurring.
> This patch applies to known affected platforms.
> Signed-off-by: Radu Solea <>
> Signed-off-by: Iuliana Prodan <>
Reviewed-by: Horia Geantă <>


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