Messages in this thread | | | Date | Thu, 12 Jun 2014 21:47:25 +0400 | From | Sergei Shtylyov <> | Subject | Re: [PATCH 1/2] ahci: Check and set 64-bit DMA mask for platform AHCI driver |
| |
Hello.
On 06/12/2014 09:40 PM, suravee.suthikulpanit@amd.com wrote:
> From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> The current platform AHCI driver 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> > Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> > Reviewed-by: Hans de Goede <hdegoede@redhat.com> > --- > drivers/ata/libahci_platform.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+)
> diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c > index 3a5b4ed..a958a2b 100644 > --- a/drivers/ata/libahci_platform.c > +++ b/drivers/ata/libahci_platform.c > @@ -364,6 +364,19 @@ int ahci_platform_init_host(struct platform_device *pdev, > ap->ops = &ata_dummy_port_ops; > } > > + if (hpriv->cap & HOST_CAP_64) { > + rc = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); > + if (rc) { > + rc = dma_coerce_mask_and_coherent(dev, > + DMA_BIT_MASK(32)); > + if (rc) { > + dev_err(dev, "Failed to enable 64-bit DMA.\n");
Not 32-bit?
> + return rc; > + } > + dev_warn(dev, "Enable 32-bit DMA instead of 64-bit.\n"); > + } > + } > +
WBR, Sergei
| |