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From: Miquel Raynal <miquel.raynal@free-electrons.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>,
	Richard Weinberger <richard@nod.at>,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mtd: nand: MTD_NAND_MARVELL should depend on HAS_DMA
Date: Tue, 30 Jan 2018 14:46:47 +0100	[thread overview]
Message-ID: <20180130144647.73a44b8d@xps13> (raw)
In-Reply-To: <1517318601-14793-1-git-send-email-geert@linux-m68k.org>

Hi Geert,

On Tue, 30 Jan 2018 14:23:21 +0100
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> If NO_DMA=y:
> 
>     ERROR: "bad_dma_ops" [drivers/mtd/nand/marvell_nand.ko] undefined!
> 
> Add a dependency on HAS_DMA to fix this.
> 
> Fixes: 02f26ecf8c772751 ("mtd: nand: add reworked Marvell NAND controller driver")
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> ---
>  drivers/mtd/nand/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> index e6b8c59f2c0da7c0..736ac887303c88ba 100644
> --- a/drivers/mtd/nand/Kconfig
> +++ b/drivers/mtd/nand/Kconfig
> @@ -328,7 +328,7 @@ config MTD_NAND_MARVELL
>  	tristate "NAND controller support on Marvell boards"
>  	depends on PXA3xx || ARCH_MMP || PLAT_ORION || ARCH_MVEBU || \
>  		   COMPILE_TEST
> -	depends on HAS_IOMEM
> +	depends on HAS_IOMEM && HAS_DMA

I think this is more a coding issue than a Kconfig issue. AFAIR, none
of the ARCH_MVEBU SoCs use DMA in conjunction with the NAND controller.
PXA SoCs may use DMA (NFCv1 only) but this is not a hard requirement and
the driver is supposed to support PIO mode in all situations.

Can you please share your setup, the SoC, the configuration,
maybe also the DT?


Thanks,
Miquèl

  reply	other threads:[~2018-01-30 13:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-30 13:23 [PATCH] mtd: nand: MTD_NAND_MARVELL should depend on HAS_DMA Geert Uytterhoeven
2018-01-30 13:46 ` Miquel Raynal [this message]
2018-01-30 13:56   ` Boris Brezillon
2018-01-30 13:59     ` Geert Uytterhoeven
2018-01-30 14:05       ` Miquel Raynal
2018-02-12 21:22 ` Boris Brezillon

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