linux-kernel - Re: [PATCH 3/7] ark3116: (3rd try) Replace cmget

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Date:	Sun, 25 Oct 2009 20:52:08 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	bart.hartgers@...il.com
Cc:	"Greg Kroah-Hartman" <gregkh@...e.de>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] ark3116: (3rd try) Replace cmget

Am Sonntag, 25. Oktober 2009 18:51:00 schrieb bart.hartgers@...il.com:
> +       /* read modem status */
> +       unsigned status = atomic_read(&priv->msr);
> +       /* modem control is output */
> +       unsigned ctrl = atomic_read(&priv->mcr);

What is the sense of having two atomic variables?
You can get races where one is changed but the other is not.

	Regards
		Oliver

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