Daniele Palmas <dnlplm@xxxxxxxxx> writes: > The problem is in cdc_ncm, function cdc_ncm_bind_common, line > > usleep_range(10000, 20000); > > It seems that LE922 needs an higher timeout; changing the line to > > usleep_range(70000, 80000); > > makes the modem to work fine. Extremely interesting! As you probably noticed, that delay was recently added as a workaround for the same problem on Sierra Wireless EM7455 modems. I believe these are based on the Qualcomm MDM9230. Which chipset is the LE922 based on? Is it also one of the newer Qualcom chips? > I will submit a patch for this. Thanks. It would also be great if you could trigger some investigation into the actual firmware issue. It looks like the firmware returns control to the driver before it's actually ready at this point of initialisation. Bjørn -- 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
