diff options
| -rw-r--r-- | drivers/thunderbolt/acpi.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/thunderbolt/acpi.c b/drivers/thunderbolt/acpi.c index b67e72d5644b..7c9597a33929 100644 --- a/drivers/thunderbolt/acpi.c +++ b/drivers/thunderbolt/acpi.c @@ -7,6 +7,7 @@ */ #include <linux/acpi.h> +#include <linux/pm_runtime.h> #include "tb.h" @@ -74,8 +75,18 @@ static acpi_status tb_acpi_add_link(acpi_handle handle, u32 level, void *data, pci_pcie_type(pdev) == PCI_EXP_TYPE_DOWNSTREAM))) { const struct device_link *link; + /* + * Make them both active first to make sure the NHI does + * not runtime suspend before the consumer. The + * pm_runtime_put() below then allows the consumer to + * runtime suspend again (which then allows NHI runtime + * suspend too now that the device link is established). + */ + pm_runtime_get_sync(&pdev->dev); + link = device_link_add(&pdev->dev, &nhi->pdev->dev, DL_FLAG_AUTOREMOVE_SUPPLIER | + DL_FLAG_RPM_ACTIVE | DL_FLAG_PM_RUNTIME); if (link) { dev_dbg(&nhi->pdev->dev, "created link from %s\n", @@ -84,6 +95,8 @@ static acpi_status tb_acpi_add_link(acpi_handle handle, u32 level, void *data, dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", dev_name(&pdev->dev)); } + + pm_runtime_put(&pdev->dev); } out_put: |