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Message-ID: <a1d0f706-f12e-dbf2-be18-99f22d91eccc@kernel.org>
Date: Mon, 21 Nov 2022 09:42:39 +0100
From: Jiri Slaby <jirislaby@...nel.org>
To: Gabriel Somlo <gsomlo@...il.com>, linux-kernel@...r.kernel.org
Cc: linux-serial@...r.kernel.org, gregkh@...uxfoundation.org,
kgugala@...micro.com, mholenko@...micro.com, joel@....id.au,
david.abdurachmanov@...il.com, florent@...oy-digital.fr,
geert@...ux-m68k.org, ilpo.jarvinen@...ux.intel.com
Subject: Re: [PATCH v5 09/14] serial: liteuart: fix rx loop variable types
On 21. 11. 22, 9:37, Jiri Slaby wrote:
> On 18. 11. 22, 15:55, Gabriel Somlo wrote:
>> Update variable types to match the signature of uart_insert_char()
>> which consumes them.
>>
>> Signed-off-by: Gabriel Somlo <gsomlo@...il.com>
>> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
>> ---
>> drivers/tty/serial/liteuart.c | 3 +--
>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/tty/serial/liteuart.c
>> b/drivers/tty/serial/liteuart.c
>> index 81aa7c1da73c..42ac9aee050a 100644
>> --- a/drivers/tty/serial/liteuart.c
>> +++ b/drivers/tty/serial/liteuart.c
>> @@ -73,8 +73,7 @@ static void liteuart_timer(struct timer_list *t)
>> struct liteuart_port *uart = from_timer(uart, t, timer);
>> struct uart_port *port = &uart->port;
>> unsigned char __iomem *membase = port->membase;
>> - int ch;
>> - unsigned long status;
>> + unsigned int status, ch;
>
> These should be u8 after all, right?
>
> Wait, status is a bool in the end:
>
>> while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) {
>
> But why is it passed to uart_insert_char() as such? That's ugly. Maybe
> drop all of this "status" and pass LSR_RXC directly.
Actually, even 0 directly, provided overrun parameter is always 0.
> The while's
> condition would simply look like (!litex_read8(membase + OFF_RXEMPTY))
> then.
>
>> ch = litex_read8(membase + OFF_RXTX);
>
> thanks,
--
js
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