linux-kernel - Re: [PATCH 2/3] serial: 8250_dw: Take port lock while accessing LSR

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Message-ID: <YrmnQSSZmFo7SJEz@kroah.com>
Date:   Mon, 27 Jun 2022 14:49:05 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc:     linux-serial@...r.kernel.org, Jiri Slaby <jirislaby@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] serial: 8250_dw: Take port lock while accessing LSR

On Wed, Jun 15, 2022 at 12:06:50PM +0300, Ilpo Järvinen wrote:
> Accessing LSR requires port lock because it mutates lsr_saved_flags
> in serial_lsr_in().
> 
> Fixes: 197eb5c416ff ("serial: 8250_dw: Use serial_lsr_in() in dw8250_handle_irq()")
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> ---
>  drivers/tty/serial/8250/8250_dw.c | 3 +++
>  1 file changed, 3 insertions(+)

Does not apply against my tty-linus branch, you mixed patches up in this
series which is confusing for anyone wanting to apply them.

I've applied the first, but the next two you should resend.

thanks,

greg k-h