Re: Qestion: of property has dead-lock to call .probe()

4 Sep 2024


      Hi Saravana
...
...
[Style-A]
        +---+  +---+
        |(A)+--+   |
        +-+-+  |   |
          |    |(B)|
        +-+-+  |   |
        |(C)+--+   |
        +---+  +---+
(snip)
...
...
[Style-B]
        +---+  +---+
        |(A)+--+   |
        +---+  |   |
               |(B)|
        +---+  |   |
        |(C)+--+   |
        +---+  +---+
(snip)
...
...
In my debug, it seems...
        - (B) is handled as supplier for (A).
        - (B) probe() is called, but it needs (A) info which is not yet
          probed. So it returns -EPROBE_DEFER.
        - Because (B) is not probed, (A) probe() never called
(snip)
...
Anyway, I solved this recently in a general way. Use
"post-init-providers" property in the node of "A" and point it to "B".
This tells fw_devlink that B is not needed for A to probe.
Thank you for your help !!
"post-init-providers" property helped my issue.
Best regards
---
Kuninori Morimoto