linux-kernel - Re: [PATCH] bus: fsl-mc: dpio: fix alter FQ state command

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Message-ID: <CAEac7tYLy0R14mPprYYxT5EfA=RDDFQoHQThbXMrAVb70uWCcg@mail.gmail.com>
Date:   Fri, 21 Apr 2017 08:31:12 -0500
From:   Stuart Yoder <stuyoder@...il.com>
To:     Horia Geantă <horia.geanta@....com>
Cc:     gregkh@...uxfoundation.org, Roy Pledge <roy.pledge@....com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Haiying Wang <haiying.wang@....com>,
        Ioana Radulescu <ruxandra.radulescu@....com>
Subject: Re: [PATCH] bus: fsl-mc: dpio: fix alter FQ state command

On Fri, Apr 21, 2017 at 7:00 AM, Horia Geantă <horia.geanta@....com> wrote:
>
> When checking the response verb, the valid bit should be masked out,
> since its value flips depending on what Response Register
> (RR0 /RR1) it's been read from.
>
> Fixes: 321eecb06bfb ("bus: fsl-mc: dpio: add QBMan portal APIs for DPAA2")
> Signed-off-by: Horia Geantă <horia.geanta@....com>
> ---
>  drivers/staging/fsl-mc/bus/dpio/qbman-portal.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/fsl-mc/bus/dpio/qbman-portal.c b/drivers/staging/fsl-mc/bus/dpio/qbman-portal.c
> index 2a3ea29d9b43..5d020fb98c66 100644
> --- a/drivers/staging/fsl-mc/bus/dpio/qbman-portal.c
> +++ b/drivers/staging/fsl-mc/bus/dpio/qbman-portal.c
> @@ -963,7 +963,7 @@ int qbman_swp_alt_fq_state(struct qbman_swp *s, u32 fqid,
>         }
>
>         /* Decode the outcome */
> -       WARN_ON(r->verb != alt_fq_verb);
> +       WARN_ON((r->verb & 0x7f) != alt_fq_verb);

Don't use magic constants like that.  Create a #define for the valid bit.

Thanks,
Stuart