Re: [PATCH v10 09/10] ACPI/IORT: Enable stall support for platform devices
From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Date: 2021-01-21 19:29:18
Also in:
linux-arm-kernel, linux-devicetree, linux-iommu
On Thu, 21 Jan 2021 13:36:23 +0100 Jean-Philippe Brucker [off-list ref] wrote:
Copy the "Stall supported" bit, that tells whether a named component supports stall, into the dma-can-stall device property. Signed-off-by: Jean-Philippe Brucker <redacted>
FWIW given how simple this is : Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
quoted hunk ↗ jump to hunk
--- 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 c9a8bbb74b09..42820d7eb869 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");