Message-ID: <538B6F92.7010009@amd.com>
Date: Sun, 1 Jun 2014 13:23:14 -0500
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
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To: <tj@kernel.org>
CC: <linux-ide@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1] ata: Check and set 64-bit DMA mask for platform AHCI
 driver
References: <1400866510-3130-1-git-send-email-suravee.suthikulpanit@amd.com>
In-Reply-To: <1400866510-3130-1-git-send-email-suravee.suthikulpanit@amd.com>
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Sender: linux-kernel-owner@vger.kernel.org

Hi Tejun,

I am following up on this patch.

Thank you,

Suravee

On 05/23/2014 12:35 PM, suravee.suthikulpanit@amd.com wrote:
> From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
>
> The current platform AHCI drier does not set the dma_mask correctly
> for 64-bit DMA capable AHCI controller.  This patch checks the AHCI
> capability bit and set the dma_mask and coherent_dma_mask accordingly.
>
> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> ---
>   drivers/ata/libahci_platform.c | 9 +++++++++
>   1 file changed, 9 insertions(+)
>
> diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
> index 7cb3a85..85049ef 100644
> --- a/drivers/ata/libahci_platform.c
> +++ b/drivers/ata/libahci_platform.c
> @@ -368,6 +368,15 @@ int ahci_platform_init_host(struct platform_device *pdev,
>   	ahci_init_controller(host);
>   	ahci_print_info(host, "platform");
>
> +	if (hpriv->cap & HOST_CAP_64) {
> +		if (!dev->dma_mask)
> +			dev->dma_mask = &dev->coherent_dma_mask;
> +
> +		rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
> +		if (rc)
> +			return rc;
> +	}
> +
>   	return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
>   				 &ahci_platform_sht);
>   }
>
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