linux-kernel - Re: [PATCH 2/2] cdc-acm: correct counting of UART states in serial state notification

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Message-ID: <1538660052.1254.4.camel@suse.com>
Date:   Thu, 04 Oct 2018 15:34:12 +0200
From:   Oliver Neukum <oneukum@...e.com>
To:     Tobias Herzog <t-herzog@....de>
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/2] cdc-acm: correct counting of UART states in serial
 state notification

On Sa, 2018-09-22 at 22:11 +0200, Tobias Herzog wrote:
> The usb standard ("Universal Serial Bus Class Definitions for Communication
> Devices") distiguishes between "consistent signals" (DSR, DCD), and
> "irregular signals" (break, ring, parity error, framing error, overrun).
> The bits of "irregular signals" are set, if this error/event occurred on
> the device side and are immeadeatly unset, if the serial state notification
> was sent.
> Like other drivers of real serial ports do, just the occurence of those
> events should be counted in serial_icounter_struct (but no 1->0
> transitions).
> 
> Signed-off-by: Tobias Herzog <t-herzog@....de>
Acked-by: Oliver Neukum <oneukum@...e.com>