Re: [patch 03/12] can: c_can: Make it SMP safe

[Marc Kleine-Budde]

On 03/18/2014 06:19 PM, Thomas Gleixner wrote:
> The hardware has two message control interfaces, but the code only
> uses the first one. So on SMP the following can be observed:
> 
> CPU0 	       	CPU1
> rx_poll()
>   write IF1	xmit()
> 		write IF1
>   write IF1			
> 
> That results in corrupted message object configurations. The TX/RX is
> not globally serialized it's only serialized on a core.
> 
> Simple solution: Let RX use IF1 and TX use IF2 and all is good.

Do both c_can and d_can have two control interfaces?

> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Otherwise, looks good.

Tnx,
Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |

Attachment: signature.asc
Description: OpenPGP digital signature