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From: Huang Shijie <b32955@freescale.com>
To: Kamal Dasu <kdasu.kdev@gmail.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: [PATCH v2] mtd: nand: Add support to use nand_base poi databuf as bounce buffer
Date: Fri, 25 Apr 2014 10:07:29 +0800	[thread overview]
Message-ID: <5359C361.9000302@freescale.com> (raw)
In-Reply-To: <1398375634-24759-1-git-send-email-kdasu.kdev@gmail.com>

于 2014年04月25日 05:40, Kamal Dasu 写道:
> + * This option is defined to protect against kmapped buffers
> + * being passed from highmem when using DMA
the dma API can not support the highmem.

could you show us how do the driver use the highmem buffer?

In the gpmi driver, i do a memcpy for the highmem buffer passed from 
upper layer.

thanks
Huang Shijie

  reply	other threads:[~2014-04-25  2:05 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-24 21:40 [PATCH v2] mtd: nand: Add support to use nand_base poi databuf as bounce buffer Kamal Dasu
2014-04-25  2:07 ` Huang Shijie [this message]
2014-04-25  3:52   ` Kamal Dasu
2014-04-25  7:43     ` Huang Shijie
2014-04-25  7:59       ` Huang Shijie
2014-04-25 16:10         ` Kamal Dasu
2014-04-28  9:08           ` Huang Shijie
2014-04-28  9:16 ` Huang Shijie
2014-04-28 15:42 ` Huang Shijie

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