On Wed, Apr 19, 2017 at 7:28 PM, Bjørn Mork <bjorn@xxxxxxx> wrote: >> as a side note in latest kernels I had troubles with qmi devices >> (e.g. I/O error when using qmicli). >> >> I found your suggestion in libqmi mailing list to revert commit >> >> 833415a3e781a26fe480a34d45086bdb4fe1e4c0 >> cdc-wdm: fix "out-of-sync" due to missing notifications > > I guess a revert of that commit should be done then.. > > I have been stalling because I have been hoping to replace it with a > better fix instead of a plain revert. I believe there are several issues > playing badly together here. That commit was _expected_ to cause > spurious EPIPE errors, which would be translated to EIO if they were > propagated. But they should be filtered out rightaway, in theory. This > works for me. I can see the EPIPEs with debugging, but I have never > seen any EIO from read. > > And there is the problem: I am unable to reproduce this problem. I have > previously tested this back and forth with several MDM9200 and MDM9235 > generation modems in QMI mode, as well as in MBIM mode. And also with a > number of other MBIM modems. Aleksander reported that he could > reproduce the issue using an MDM9x15 generation modem in QMI mode, but > not with any MDM9x00 or MDM9x35 modem. So I have now tried any way I > can imagine to reproduce the issue with a Sierra Wireless EM7305, which > is the only MDM9x15 modem I have. The firmware is SWI9X15C_05.05.58.00. > > But unfortunately the testing is still without "success". It plain > works for me, every time, using ModemManager, qmicli with or without > proxy, or uqmi. > > Would you mind describing in detail how you trigger the EIOs? What > software and command sequence are you using? Does it reliably reproduce > the issue, or do you have to try several times? What modem chipset and > firmware is used? Reliably, as in the second command I sent already showed the issue :/ I meant to try to debug this issue myself a while ago, but got busy with other stuff, as usual... This is with a Sierra Wireless MC7304 running SWI9X15C_05.05.67.00. If you want, I can give you SSH access to a system with this modem plugged in, or I can even send you a spare MC7354, whatever you prefer. I'm just running --dms-get-operating-mode multiple times, and getting errors frequently: aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [/dev/cdc-wdm3] Operating mode retrieved: Mode: 'online' HW restricted: 'no' aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [19 abr 2017, 20:25:36] -Warning ** Error reading from istream: Error reading from file descriptor: Input/output error ^[[A^Ccancelling the operation... error: couldn't create client for the 'dms' service: Operation was cancelled aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [19 abr 2017, 20:25:38] -Warning ** Error reading from istream: Error reading from file descriptor: Input/output error ^Ccancelling the operation... error: couldn't create client for the 'dms' service: Operation was cancelled aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [/dev/cdc-wdm3] Operating mode retrieved: Mode: 'online' HW restricted: 'no' aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [/dev/cdc-wdm3] Operating mode retrieved: Mode: 'online' HW restricted: 'no' aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [/dev/cdc-wdm3] Operating mode retrieved: Mode: 'online' HW restricted: 'no' aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [/dev/cdc-wdm3] Operating mode retrieved: Mode: 'online' HW restricted: 'no' aleksander@athena:~/Development/foss/libqmi:(master)$ sudo qmicli -d /dev/cdc-wdm3 --dms-get-operating-mode [19 abr 2017, 20:25:52] -Warning ** Error reading from istream: Error reading from file descriptor: Input/output error error: couldn't create client for the 'dms' service: CID allocation failed in the CTL client: Transaction timed out ... -- Aleksander https://aleksander.es -- 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
