diff options
| author |   Suthikulpanit, Suravee <Suravee.Suthikulpanit@amd.com> | 2015-10-28 15:50:51 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-07 01:29:22 +0100 |
| commit | ab3d527329f01dd63dc852041006d1a24895d116 (patch) | |
| tree | 992f8b6afc3af79edb8ce18c31b579f33cda8313 /include/acpi | |
| parent | device property: ACPI: Make use of the new DMA Attribute APIs (diff) | |
| download | linux-dev-ab3d527329f01dd63dc852041006d1a24895d116.tar.xz linux-dev-ab3d527329f01dd63dc852041006d1a24895d116.zip | |
device property: ACPI: Remove unused DMA APIs
These DMA APIs are replaced with the newer versions, which return
the enum dev_dma_attr. So, we can safely remove them.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_bus.h | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index e56e6520edce..e45d58d6b0a7 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -390,40 +390,6 @@ struct acpi_data_node { struct completion kobj_done; }; -static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent) -{ - bool ret = false; - - if (!adev) - return ret; - - /** - * Currently, we only support _CCA=1 (i.e. coherent_dma=1) - * This should be equivalent to specifyig dma-coherent for - * a device in OF. - * - * For the case when _CCA=0 (i.e. coherent_dma=0 && cca_seen=1), - * There are two cases: - * case 1. Do not support and disable DMA. - * case 2. Support but rely on arch-specific cache maintenance for - * non-coherence DMA operations. - * Currently, we implement case 2 above. - * - * For the case when _CCA is missing (i.e. cca_seen=0) and - * platform specifies ACPI_CCA_REQUIRED, we do not support DMA, - * and fallback to arch-specific default handling. - * - * See acpi_init_coherency() for more info. - */ - if (adev->flags.coherent_dma || - (adev->flags.cca_seen && IS_ENABLED(CONFIG_ARM64))) { - ret = true; - if (coherent) - *coherent = adev->flags.coherent_dma; - } - return ret; -} - static inline bool is_acpi_node(struct fwnode_handle *fwnode) { return fwnode && (fwnode->type == FWNODE_ACPI |