On 18. 08. 20, 11:56, Tony Lindgren wrote: > Hi, > > * Jiri Slaby <jirislaby@xxxxxxxxxx> [200818 08:24]: >> On 17. 08. 20, 15:54, Tony Lindgren wrote: >>> If write returns zero we currently end up removing the message >>> from the queue. Instead of removing the message, we want to just >>> break out of the loop just like we already do for error codes. >> >> When exactly does the only writer (gsmld_output) return zero for >> non-zero len parameter? > > I ran into this when testing with the WIP serial core PM runtime > changes from Andy Shevchenko earlier. If there are also other > cases where we have serial drivers return 0, I don't know about > them. Sorry, I don't understand: my gsmld_output() ignores the return value from drivers' write and returns something greater than zero or a negative error. What tree/SHA do you run? > Basically with the WIP serial core changes, if the open serial port > is in PM runtime suspended state with it's autosuspend_delay_ms > expired, we have write return 0 and just wake up the serial device > on TX. -- js
