On 03/23/10 10:13, Amit Shah wrote: >>> + if (use_multiport(port->portdev)&& !port->host_connected) >>> + return -EPIPE; >>> + >> >> Hmm, do applications actually handle this error? > > Don't know; there aren't any apps yet that use this functionality too.
Looks sensible to me. > However, some error has to be indicated to the app otherwise it's just > messy if the app keeps writing and receiving EAGAIN; we just get a tight > loop in this case. With poll support done right (don't signal "writable" when not connected) this shouldn't be a issue. Apps retrying over and over without waiting for the filehandle becoming writable are broken by design. But apps can't disturgish between "ring full" and "host disconnected" then. So think returning -EPIPE here isn't a bad choice. cheers, Gerd _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
