linux-kernel - Re: [PATCH 1/2] can: m_can: Increase delay to ensure written INIT accepted

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Message-ID: <564C5234.40708@pengutronix.de>
Date:	Wed, 18 Nov 2015 11:25:56 +0100
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Wenyou Yang <wenyou.yang@...el.com>,
	Wolfgang Grandegger <wg@...ndegger.com>
Cc:	linux-can@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Nicolas Ferre <nicolas.ferre@...el.com>
Subject: Re: [PATCH 1/2] can: m_can: Increase delay to ensure written INIT
 accepted

On 11/18/2015 11:04 AM, Wenyou Yang wrote:
> Increase the delay time until the value written to INIT can be
> read back to ensure that the previous value written to INIT has
> been accepted.
> 
> Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>

The patch looks ok, can you please add to your commit message which SoCs
are affected by this problem.

> ---
> 
>  drivers/net/can/m_can/m_can.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
> index ef65517..fd1caa0 100644
> --- a/drivers/net/can/m_can/m_can.c
> +++ b/drivers/net/can/m_can/m_can.c
> @@ -320,7 +320,7 @@ static inline void m_can_config_endisable(const struct m_can_priv *priv,
>  					  bool enable)
>  {
>  	u32 cccr = m_can_read(priv, M_CAN_CCCR);
> -	u32 timeout = 10;
> +	u32 timeout = 1000;
>  	u32 val = 0;
>  
>  	if (enable) {
> 

Marc

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