On Mon Jun 23 13:00:35 2025 +0200, Hans de Goede wrote:
> 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 <hdego...@redhat.com>
> Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
> Signed-off-by: Hans Verkuil <hverk...@xs4all.nl>
Patch committed.
Thanks,
Hans Verkuil
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 2124fad0570b..4e579352ab2c 100644
--- a/drivers/media/pci/intel/ipu-bridge.c
+++ b/drivers/media/pci/intel/ipu-bridge.c
@@ -815,7 +815,8 @@ 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)
