Am Donnerstag, 26. August 2010, 10:55:22 schrieb Artem Makhutov: > Hello, > > Artem Makhutov schrieb: > > [...] > > When connecting multiple modems to a pc and start communicatin with them > > the connection gets broken and the log file gets full of the following > > messages: > > > > [...] > > option: option_instat_callback: error -71 > > option: option_instat_callback: error -71 > > option: option_instat_callback: error -71 > > [...] > > > > I forgot to mention that the errors: > > Aug 26 11:49:30 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:31 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:38 localhost kernel: option: option_instat_callback: error -32 > Aug 26 11:49:39 localhost kernel: option: option_instat_callback: error -32 > > Are also pretty common. -EPIPE. The device is indicating an error condition. We'd need to handle it and clear the pipe. > The error is pretty easy to reproduce: > > I just need to connect the modems to a pc and open the ttyUSBX port > using minicom. Did you ever see it with a single modem? > A few minutes later I can not send any AT commands to the modem any > more, neigther I can receive the preriodical updates from the modem. You cannot ignore -EPIPE. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
