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From: "Zhao, Leilei" <Leilei.Zhao@atmel.com>
To: Jiri Slaby <jslaby@suse.cz>,
	"Ferre, Nicolas" <Nicolas.FERRE@atmel.com>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
	"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: RE: [PATCH 1/5] tty/serial: at91: correct check of buf used in DMA
Date: Fri, 27 Feb 2015 07:38:11 +0000	[thread overview]
Message-ID: <C2F288CD23A3A94D985CB167373816C92AC7E162@penmbx01> (raw)
In-Reply-To: <54EEE792.9060706@suse.cz>

Thanks

Best Regards
Zhao Leilei

-----Original Message-----
From: Jiri Slaby [mailto:jirislaby@gmail.com] On Behalf Of Jiri Slaby
Sent: Thursday, February 26, 2015 17:30
To: Zhao, Leilei; Ferre, Nicolas; gregkh@linuxfoundation.org; linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/5] tty/serial: at91: correct check of buf used in DMA

On 02/26/2015, 07:55 AM, Leilei Zhao wrote:
> We only use buf of ring In DMA rx function while using buf of xmit in 
> DMA tx function. So here we need definitively to check the buf of ring 
> which is corresponding to DMA rx function.
> 
> Signed-off-by: Leilei Zhao <leilei.zhao@atmel.com>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> ---
>  drivers/tty/serial/atmel_serial.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/atmel_serial.c 
> b/drivers/tty/serial/atmel_serial.c
> index 846552b..460903c 100644
> --- a/drivers/tty/serial/atmel_serial.c
> +++ b/drivers/tty/serial/atmel_serial.c
> @@ -1027,7 +1027,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
>  	spin_lock_init(&atmel_port->lock_rx);
>  	sg_init_table(&atmel_port->sg_rx, 1);
>  	/* UART circular rx buffer is an aligned page. */
> -	BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK);
> +	BUG_ON((int)ring->buf & ~PAGE_MASK);

Please use PAGE_ALIGNED. This will also make the bad (int) cast to dismiss.

thanks,
--
js
suse labs

  reply	other threads:[~2015-02-27  7:38 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-26  6:55 [PATCH 0/5] tty/serial: at91: fix bugs when using multiple serials Leilei Zhao
2015-02-26  6:55 ` [PATCH 1/5] tty/serial: at91: correct check of buf used in DMA Leilei Zhao
2015-02-26  9:29   ` Jiri Slaby
2015-02-27  7:38     ` Zhao, Leilei [this message]
2015-02-26  6:55 ` [PATCH 2/5] tty/serial: at91: correct buffer size " Leilei Zhao
2015-02-26  6:55 ` [PATCH 3/5] tty/serial: at91: revise the return type of atmel_init_property Leilei Zhao
2015-02-26  6:55 ` [PATCH 4/5] tty/serial: at91: set ops in property init each time Leilei Zhao
2015-02-26  6:55 ` [PATCH 5/5] tty/serial: at91: correct the usage of tasklet Leilei Zhao

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