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| author |   Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> | 2014-06-12 12:40:23 -0500 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2014-06-17 15:02:35 -0400 |
| commit | cc7a9e27562cd78a1dc885504086fab24addce40 (patch) | |
| tree | af6fe405b9a1262922b2e1079b5a84c9768ffdbb /drivers/ata | |
| parent | ata: Use dma_zalloc_coherent (diff) | |
| download | linux-dev-cc7a9e27562cd78a1dc885504086fab24addce40.tar.xz linux-dev-cc7a9e27562cd78a1dc885504086fab24addce40.zip | |
ahci: Check and set 64-bit DMA mask for platform AHCI driver
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>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libahci_platform.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c index 3a5b4ed25a4f..a958a2b8fd93 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"); + return rc; + } + dev_warn(dev, "Enable 32-bit DMA instead of 64-bit.\n"); + } + } + rc = ahci_reset_controller(host); if (rc) return rc; |