| Message ID | 20200904110918.51546-1-heikki.krogerus@linux.intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: typec: ucsi: acpi: Check the _DEP dependencies | expand |
diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c index 9fc4f338e8700..c0aca2f0f23f0 100644 --- a/drivers/usb/typec/ucsi/ucsi_acpi.c +++ b/drivers/usb/typec/ucsi/ucsi_acpi.c @@ -112,11 +112,15 @@ static void ucsi_acpi_notify(acpi_handle handle, u32 event, void *data) static int ucsi_acpi_probe(struct platform_device *pdev) { + struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); struct ucsi_acpi *ua; struct resource *res; acpi_status status; int ret; + if (adev->dep_unmet) + return -EPROBE_DEFER; + ua = devm_kzalloc(&pdev->dev, sizeof(*ua), GFP_KERNEL); if (!ua) return -ENOMEM;
Failing probe with -EPROBE_DEFER until all dependencies listed in the _DEP (Operation Region Dependencies) object have been met. This will fix an issue where on some platforms UCSI ACPI driver fails to probe because the address space handler for the operation region that the UCSI ACPI interface uses has not been loaded yet. Fixes: 8243edf44152 ("usb: typec: ucsi: Add ACPI driver") Cc: stable@vger.kernel.org Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> --- drivers/usb/typec/ucsi/ucsi_acpi.c | 4 ++++ 1 file changed, 4 insertions(+)