[PATCH v14 09/10] ACPI/IORT: Enable stall support for platform devices

Jean-Philippe Brucker
2021-04-01T16:01:41Z

Copy the "Stall supported" bit, that tells whether a named component
supports stall, into the dma-can-stall device property.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
drivers/acpi/arm64/iort.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 3912a1f6058e..0828f70cb782 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -968,13 +968,15 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
static void iort_named_component_init(struct device *dev,
struct acpi_iort_node *node)
{
- struct property_entry props[2] = {};
+ struct property_entry props[3] = {};
struct acpi_iort_named_component *nc;

nc = (struct acpi_iort_named_component *)node->node_data;
props[0] = PROPERTY_ENTRY_U32("pasid-num-bits",
FIELD_GET(ACPI_IORT_NC_PASID_BITS,
nc->node_flags));
+ if (nc->node_flags & ACPI_IORT_NC_STALL_SUPPORTED)
+ props[1] = PROPERTY_ENTRY_BOOL("dma-can-stall");

if (device_add_properties(dev, props))
dev_warn(dev, "Could not add device properties\n");
--
2.31.1