ACPI/IORT: Set bus DMA mask as appropriate

rmurphy-arm · Christoph Hellwig · commit d74ea7100b0d · 2018-07-27T19:01:05.000+02:00
When an explicit DMA limit is described by firmware, we need to remember
it regardless of how drivers might subsequently update their devices'
masks. The new bus_dma_mask field does that.

Signed-off-by: Robin Murphy &lt;robin.murphy@arm.com&gt;
Acked-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Acked-by: Lorenzo Pieralisi &lt;lorenzo.pieralisi@arm.com&gt;
Signed-off-by: Christoph Hellwig &lt;hch@lst.de&gt;
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
@@ -1014,6 +1014,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
 		 * Limit coherent and dma mask based on size
 		 * retrieved from firmware.
 		 */
+		dev->bus_dma_mask = mask;
 		dev->coherent_dma_mask = mask;
 		*dev->dma_mask = mask;
 	}

Original file line number	Diff line number	Diff line change
`@@ -1014,6 +1014,7 @@ void iort_dma_setup(struct device dev, u64 dma_addr, u64 *dma_size)`
`1014`	`1014`	`* Limit coherent and dma mask based on size`
`1015`	`1015`	`* retrieved from firmware.`
`1016`	`1016`	`*/`
	`1017`	`+ dev->bus_dma_mask = mask;`
`1017`	`1018`	`dev->coherent_dma_mask = mask;`
`1018`	`1019`	`*dev->dma_mask = mask;`
`1019`	`1020`	`}`