On 11/11/21 17:28, Ed Branch wrote:
Thanks for the quick reply. Understood, digging this out properly (ie. finding the /sys/class/ptp/ptp*/dev file with a matching minor to that of the device node) would add a lot of complexity. However, looking at the alloc_chardev_region() call in the ptp driver (drivers/ptp/ptp_clock.c) reveals the first minor in the requested range is always 0, so it might be ok to assume the PHC index is just the device node minor.Of course your suggestion of just ignoring the failure in phc2sys would be enough to fix my use case too.Thanks again for looking at this, - Ed Branch
Reading a bit further into posix_clock_open(...), I see it already relied on existence of device nodes named "/dev/ptp#". If these have to exist anyway then maybe there's no point accounting for other names. My actual failure is because I access them through a symlink created by udev based on the clock_name sysfs attribute. So simply resolving symlinks prior to the existing logic would also work.
For now, my workaround is to rename the symlinks so they do not match the "/dev/ptp*" pattern.
- Ed Branch
smime.p7s
Description: S/MIME Cryptographic Signature
_______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
