linux-kernel - Re: [PATCH] staging: comedi: dt2811: add parentheses to fix logic on s->subdev

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Message-ID: <20160821150710.GA16155@kroah.com>
Date:   Sun, 21 Aug 2016 17:07:10 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Colin King <colin.king@...onical.com>
Cc:     Ian Abbott <abbotti@....co.uk>,
        H Hartley Sweeten <hsweeten@...ionengravers.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: comedi: dt2811: add parentheses to fix logic on
 s->subdev_flags

On Mon, Jul 25, 2016 at 11:25:25PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> We need to add parentheses around ternary operations because currently
> the expression SDF_READABLE | (it->options[2] == 1) always evaluates to
> true, meaning s->subdev_flags is always assigned SDF_DIFF. Putting the
> parentheses around the ternarary operations results in the intended
> expression of SDF_REABLE logically or'd with one of SDF_DIFF,
> SDF_COMMON or SDF_GROUND.
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> Fixes: 7c9574090d30 ("staging: comedi: dt2811: simplify A/D reference configuration")
> Cc: <stable@...r.kernel.org> # 4.7+
> Reviewed-by: Ian Abbott <abbotti@....co.uk>


Dan sent a patch for this before you did :(

And this went into 4.8-rc1, not 4.7.

thanks,

greg k-h