The ipu-bridge code waits for the IVSC to become ready (on platforms with an IVSC chip). It does this by returning -EPROBE_DEFER, but it does not use dev_err_probe() so no reason for deferring gets registered. After 30 seconds the kernel logs a warning that the probe is still deferred, which looks like this: [ 33.951709] pci 0000:00:14.3: deferred probe pending: (reason unknown) Use dev_err_probe() when returning -EPROBE_DEFER to register the probe deferral reason changing the error to: deferred probe pending: waiting for IVSC to become ready to help with debugging why drivers are not binding if the iVSC does not become ready for some reason. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- drivers/media/pci/intel/ipu-bridge.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/pci/intel/ipu-bridge.c b/drivers/media/pci/intel/ipu-bridge.c index e407c69bfcdc..35088601ed20 100644 --- a/drivers/media/pci/intel/ipu-bridge.c +++ b/drivers/media/pci/intel/ipu-bridge.c @@ -830,7 +830,8 @@ int ipu_bridge_init(struct device *dev, return 0; if (!ipu_bridge_ivsc_is_ready()) - return -EPROBE_DEFER; + return dev_err_probe(dev, -EPROBE_DEFER, + "waiting for IVSC to become ready\n"); bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); if (!bridge) -- 2.46.2
