linux-kernel - Re: [PATCH] serial: 8250: 8250_omap: Do not start RX DMA on THRI interrupt

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Message-ID: <2023103150-esteemed-deputize-66a0@gregkh>
Date:   Tue, 31 Oct 2023 07:06:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ronald Wahl <rwahl@....de>
Cc:     linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        Vignesh Raghavendra <vigneshr@...com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Ronald Wahl <ronald.wahl@...itan.com>
Subject: Re: [PATCH] serial: 8250: 8250_omap: Do not start RX DMA on THRI
 interrupt

On Mon, Oct 30, 2023 at 07:39:51PM +0100, Ronald Wahl wrote:
> Starting RX DMA on THRI interrupt is too early because TX may not have
> finished yet.
> 
> This change is inspired by commit 90b8596ac460 ("serial: 8250: Prevent
> starting up DMA Rx on THRI interrupt") and fixes DMA issues I had with
> an AM62 SoC that is using the 8250 OMAP variant.
> 
> Signed-off-by: Ronald Wahl <ronald.wahl@...itan.com>
> ---
>  drivers/tty/serial/8250/8250_omap.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)

What commit id does this fix?

thanks,

greg k-h