Re: [PATCH 1/1] ata: Check and set 64-bit DMA mask for platform AHCI driver

[Suravee Suthikulanit]

Hans/Bartlomiej,

Do you guys have any questions about this patch?

Thank you,

Suravee

On 6/3/2014 12:58 PM, Tejun Heo wrote:
> Hans, Bartlomiej, can you guys please review this patch?
>
> Thanks.
>
> On Fri, May 23, 2014 at 12:35:10PM -0500, suravee.suthikulpanit@xxxxxxx wrote:
> > From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> >
> > 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@xxxxxxx>
> > ---
> >   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);
> >   }
> > --
> > 1.9.0
> >
> > --
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