dmaengine: acpi: Set up DMA mask based on CSRT
CSRT has an information about address width, which is supported by the certain DMA controller. Use information from CSRT to set up DMA mask for shared controller. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20190820131546.75744-2-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
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@ -10,6 +10,7 @@
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*/
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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@ -82,6 +83,12 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
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if (si->base_request_line == 0 && si->num_handshake_signals == 0)
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return 0;
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/* Set up DMA mask based on value from CSRT */
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ret = dma_coerce_mask_and_coherent(&adev->dev,
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DMA_BIT_MASK(si->dma_address_width));
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if (ret)
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return 0;
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adma->base_request_line = si->base_request_line;
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adma->end_request_line = si->base_request_line +
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si->num_handshake_signals - 1;
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