linux-kernel - Re: [PATCH 1/2] serial: imx: Introduce timeout when waiting on transmitter empty

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Date: Mon, 08 Apr 2024 10:57:20 +0200
From: Esben Haabendal <esben@...nix.com>
To: Marc Kleine-Budde <mkl@...gutronix.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,  Jiri Slaby
 <jirislaby@...nel.org>,  Shawn Guo <shawnguo@...nel.org>,  Sascha Hauer
 <s.hauer@...gutronix.de>,  Pengutronix Kernel Team
 <kernel@...gutronix.de>,  Fabio Estevam <festevam@...il.com>,
  linux-kernel@...r.kernel.org,  linux-serial@...r.kernel.org,
  imx@...ts.linux.dev,  linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] serial: imx: Introduce timeout when waiting on
 transmitter empty

Marc Kleine-Budde <mkl@...gutronix.de> writes:

> On 05.04.2024 19:22:29, Esben Haabendal wrote:
>> Marc Kleine-Budde <mkl@...gutronix.de> writes:
>> 
>> > On 05.04.2024 11:25:13, Esben Haabendal wrote:
>> >> By waiting at most 1 second for USR2_TXDC to be set, we avoid a potentital
>> >> deadlock.
>> >> 
>> >> In case of the timeout, there is not much we can do, so we simply ignore
>> >> the transmitter state and optimistically try to continue.
>> >> 
>> >> Signed-off-by: Esben Haabendal <esben@...nix.com>
>> >> Acked-by: Marc Kleine-Budde <mkl@...gutronix.de>
>> >
>> > Where's the cover letter and patch 2/2? Have a look at b4 [1], it's a
>> > great tool to help you with sending git patch series.
>> 
>> It is left out on purpose.
>> 
>> This patch is a stand-alone patch as it is. The other part of the series
>> you are talking about is not going to mainline for now. It needs still
>> quite some work, and will only go in after all the other printk stuff.
>> 
>> I hope we can merge this patch as it to mainline now, instead of piling
>> up more than necessary in the rt tree.
>
> Ok, then send it as patch 1/1.

Sure. Sorry about that.

/Esben