michaeliu:

Hi,

Device problem occurs on:
Comfast-EA355AC-V2 (QCA9531 + QCA9886)

Software versions:
LEDE v17.01.4
netifd: c92106e3048ae10cb04a7c7303ba5f53bc057953

Steps to reproduce:
It need to continuely reset to factory default and reboot.

When it occurs, system boot up successful. but wireless interface will setup and teardown for several times and wireless interface will disappear in the final.
After i dived into the code, I found that, check_pid_path() @177 of utils.c of netifd project will report process(hostapd) dead when system booting up during pivot_root processing.
the result of readlink of "/proc/PID/exe" will return the execution file name with "/tmp/root" as prefix(maybe something other too).
So I am trying to fix it by the patch file attached.

Please review and merge into master if it looks good.

Sorry for my bad english.

And thanks in advance.

Best Regards,
Michael