linux-kernel - Re: [PATCH v2] tty: serial: msm_serial: avoid system lockup condition

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Message-ID: <20190610170535.GA1337@kroah.com>
Date:   Mon, 10 Jun 2019 19:05:35 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
Cc:     agross@...nel.org, david.brown@...aro.org, jslaby@...e.com,
        linux-arm-msm@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, khasim.mohammed@...aro.org,
        bjorn.andersson@...aro.org
Subject: Re: [PATCH v2] tty: serial: msm_serial: avoid system lockup condition

On Mon, Jun 10, 2019 at 09:55:54AM +0200, Jorge Ramirez-Ortiz wrote:
> The function msm_wait_for_xmitr can be taken with interrupts
> disabled. In order to avoid a potential system lockup - demonstrated
> under stress testing conditions on SoC QCS404/5 - make sure we wait
> for a bounded amount of time.
> 
> Tested on SoC QCS404.
> 
> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
> ---
>  drivers/tty/serial/msm_serial.c | 4 ++++
>  1 file changed, 4 insertions(+)

What changed from v1?  Always put that below the --- line.

v3 please.

thanks,

greg k-h