Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH 1/1] ata: Check and set 64-bit DMA mask for platform AHCI driver | Date | Fri, 23 May 2014 12:35:10 -0500 |
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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); } -- 1.9.0
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