From: "Marek Behún" <kabel@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-serial@vger.kernel.org, "Pali Rohár" <pali@kernel.org>
Subject: Re: [PATCH 4/7] USB: serial: ftdi_sio: Do not reset baudrate to 9600 on error
Date: Thu, 7 Jul 2022 17:52:35 +0200 [thread overview]
Message-ID: <20220707175235.2cdb6f9a@dellmb> (raw)
In-Reply-To: <Ysb3cotx1FFyiaES@kroah.com>
On Thu, 7 Jul 2022 17:10:42 +0200
Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
> On Thu, Jul 07, 2022 at 04:53:51PM +0200, Marek Behún wrote:
> > From: Pali Rohár <pali@kernel.org>
> >
> > On failure to set new baudrate, reset baudrate to the previous value
> > (as is done by other serial drivers) instead of resetting to 9600.
>
> Where is it mandated that this is correct? Why not keep the existing
> functionality? Did you just break systems that tried to set invalid
> values and ended up with 9600 as a default?
Pali says all other drivers keep previous value on failure. He got
frustrated when working with FTDI devices because they behaved
differently.
> What changed to make this a new requirement?
>
> thanks,
>
> greg k-h
next prev parent reply other threads:[~2022-07-07 15:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-07 14:53 [PATCH 0/7] ftdi_sio driver improvements Marek Behún
2022-07-07 14:53 ` [PATCH 1/7] USB: serial: ftdi_sio: Fix divisor overflow Marek Behún
2022-07-07 15:07 ` Greg Kroah-Hartman
2022-07-07 15:37 ` Marek Behún
2022-07-07 15:50 ` Greg Kroah-Hartman
2022-07-07 14:53 ` [PATCH 2/7] USB: serial: ftdi_sio: Add missing baudrate validation Marek Behún
2022-07-07 15:08 ` Greg Kroah-Hartman
2022-07-07 16:22 ` Marek Behún
2022-07-07 16:50 ` Greg Kroah-Hartman
2022-07-07 14:53 ` [PATCH 3/7] USB: serial: ftdi_sio: Extract SIO divisor code to function Marek Behún
2022-07-07 15:06 ` Greg Kroah-Hartman
2022-07-07 15:41 ` Marek Behún
2022-07-07 15:09 ` Greg Kroah-Hartman
2022-07-07 15:50 ` Marek Behún
2022-07-07 14:53 ` [PATCH 4/7] USB: serial: ftdi_sio: Do not reset baudrate to 9600 on error Marek Behún
2022-07-07 15:10 ` Greg Kroah-Hartman
2022-07-07 15:52 ` Marek Behún [this message]
2022-07-07 16:06 ` Greg Kroah-Hartman
2022-07-08 15:51 ` Andy Shevchenko
2022-07-12 11:28 ` m.brock
2022-07-12 12:09 ` Marek Behún
2022-07-12 12:11 ` Marek Behún
2022-07-07 14:53 ` [PATCH 5/7] USB: serial: ftdi_sio: Fix baudrate rounding for ASYNC_SPD_CUST Marek Behún
2022-07-07 15:11 ` Greg Kroah-Hartman
2022-07-07 16:08 ` Marek Behún
2022-07-07 16:12 ` Greg Kroah-Hartman
2022-07-07 14:53 ` [PATCH 6/7] USB: serial: ftdi_sio: Fix custom_divisor and c_*speed " Marek Behún
2022-07-07 14:53 ` [PATCH 7/7] USB: serial: ftdi_sio: Fill c_*speed fields with real baudrate Marek Behún
2022-07-07 15:11 ` Greg Kroah-Hartman
2022-07-07 15:07 ` [PATCH 0/7] ftdi_sio driver improvements Greg Kroah-Hartman
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