[PATCH v10 09/10] ACPI/IORT: Enable stall support for platform devices

[Jonathan Cameron]

On Thu, 21 Jan 2021 13:36:23 +0100
Jean-Philippe Brucker <jean-philippe at linaro.org> 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 <jean-philippe at linaro.org>

FWIW given how simple this is :
Acked-by: Jonathan Cameron <Jonathan.Cameron at huawei.com>

> ---
>  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");