linux-kernel - Re: [PATCH 2/3] Blackfin: serial driver for Blackfin architecture against Linux kernel 2.6.20

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Message-ID: <20070205104619.72cfd914@localhost.localdomain>
Date:	Mon, 5 Feb 2007 10:46:19 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	"Wu, Bryan" <Bryan.Wu@...log.com>, linux-kernel@...r.kernel.org,
	akpm@...l.org
Subject: Re: [PATCH 2/3] Blackfin: serial driver for Blackfin architecture
 against Linux kernel 2.6.20

On Mon, 5 Feb 2007 02:33:47 -0500
"Wu, Bryan" <Bryan.Wu@...log.com> wrote:

> 
> Hi everyone,
> 
> This is the serial driver supports Blackfin processors. It is designed
> for the serial core framework.
> 
> Signed-off-by: Bryan Wu <bryan.wu@...log.com>

> +
> +#ifdef CONFIG_SERIAL_BFIN_PIO
> +static void local_put_char(struct bfin_serial_port *uart, char ch)
> +{
> +	unsigned short status;
> +	int flags = 0;
> +
> +	local_irq_save(flags);
> +
> +	do {
> +		status = UART_GET_LSR(uart);
> +	} while (!(status & THRE));
> +
> +	UART_PUT_CHAR(uart, ch);
> +
> +	local_irq_restore(flags);

Should this not be using the spinlock like the other stuff rather than
local_irq_* ??

> +}
> +
> +static void
> +bfin_serial_rx_chars(struct bfin_serial_port *uart)

(trivial) Formatting - function name on same line as type

 +	local_irq_save(flags);

Likewise - why this not locks ?


Other than the locking bits looks ok, although has rather a lot of ifdefs
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