Commit 08eb567f authored by Jean-Philippe Brucker's avatar Jean-Philippe Brucker Committed by Zheng Zengkai
Browse files

ACPI/IORT: Enable stall support for platform devices 

maillist inclusion
category: feature
bugzilla: 51855
CVE: NA

Reference: https://jpbrucker.net/git/linux/commit/?h=sva/2021-03-01&id=348aa067f7c0396819ac972b7d887a5f43a8c4f4



---------------------------------------------

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

Acked-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: default avatarLijun Fang <fanglijun3@huawei.com>
Reviewed-by: default avatarWeilong Chen <chenweilong@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent 032bb290

drivers/acpi/arm64/iort.c

+3 −1
Original line number Diff line number Diff line
@@ -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");