From mboxrd@z Thu Jan  1 00:00:00 1970
From: b32955@freescale.com (Huang Shijie)
Date: Wed, 23 Nov 2011 19:13:23 +0800
Subject: [PATCH] IMX/SDMA : save the real count for one DMA transaction.
In-Reply-To: <20111123110626.GD4063@pengutronix.de>
References: <1322039585-7901-1-git-send-email-b32955@freescale.com>
 <20111123105821.GC4063@pengutronix.de> <4ECCD34C.1090400@freescale.com>
 <20111123110626.GD4063@pengutronix.de>
Message-ID: <4ECCD553.5020804@freescale.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org


>>>> +	/* save the real count we received or transmitted. */
>>>> +	chan->private = (void *)count;
>>> And if someone later needs another variable which is private?
>>>
>> I ever wanted to add an new parameter `void *` to dma_aync_tx_callback,
>> but it seemed i have
>> to change a lot of files.
>>
>> Do you have any better suggestion?
> Use a private struct and put count in there.
>
Where to put the private struct? in the imx-sdma.c ?
If i put it there, how can i get it in the UART driver with the current
DMA API?

thanks
Huang Shijie