The migration camera insertion module can only be inserted for the first time, and an error is reported for the second time

[2297514590]

These days, I have just started learning how to port cameras. I chose an OV5647 camera that is not supported on the Jetson Nano motherboard. Initially, I downloaded the source code of the Raspberry Pi kernel because there is a driver and device tree for OV5647 in the Raspberry Pi kernel for reference. However, the NVIDIA camera head framework is different from the Raspberry Pi, so I first changed the driver based on the OV5693. c supported by the nano, After comparing imx219. c and ov5693. c, the driver for ov5647 was written, and the device tree was also modified based on these two. However, when I tested in rootfs,The first time the driver was successfully inserted, the second time the following error was reported:

The error message indicates that the creation of the debugging file failed. At first, I suspected that the remove driver did not release resources, but in reality, the remove function executed：

Can you tell me what caused the second creation of the debugging file to fail? Thank you

[ShaneCCC]

What’s the “failed with error -12” ?

[2297514590]

I just read the source code and found that the ‘really’ in the driver/base/dd. c file_ The probe function contains the error message ‘probe of 8-0036 failed with error -12’:

But I don’t know how to call this function when inserting a module,Since the “probe of 8-0036 failed with error -12” message is after the “error creating debugfs interface”, I am writing on ov5647_ Debugfs_ The create function prints stack information and tracks all the called functions during the process, but no calls were found to be truly_ Probe function.

[ShaneCCC]

Maybe remove the debugfs to clarify the problem.

Thanks