diff --git a/drivers/base/property.c b/drivers/base/property.c index 1d0b116cae959041682eaf6bb7ea91895b390e58..e645852396ba44430d77273b0a513cb5e8deb78a 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -14,6 +14,7 @@ #include #include #include +#include #include /** @@ -519,3 +520,16 @@ unsigned int device_get_child_node_count(struct device *dev) return count; } EXPORT_SYMBOL_GPL(device_get_child_node_count); + +bool device_dma_is_coherent(struct device *dev) +{ + bool coherent = false; + + if (IS_ENABLED(CONFIG_OF) && dev->of_node) + coherent = of_dma_is_coherent(dev->of_node); + else + acpi_check_dma(ACPI_COMPANION(dev), &coherent); + + return coherent; +} +EXPORT_SYMBOL_GPL(device_dma_is_coherent); diff --git a/include/linux/property.h b/include/linux/property.h index de8bdf417a35adc745e37fc1df1de7453d518895..76ebde9c11d483fe3a177b049e2774550e7b2bcc 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -164,4 +164,6 @@ struct property_set { void device_add_property_set(struct device *dev, struct property_set *pset); +bool device_dma_is_coherent(struct device *dev); + #endif /* _LINUX_PROPERTY_H_ */