Sierra MC7304 ioctl crash

IoT Modules MC/EM Series
1

Hello
I´m using MC7304 in router (embeded device with Linux). I have more demons which need comunicate concurently. Demons opens qcqmi0 device, calls ioct IOCTL_QMI_GET_SERVICE_FILE with number of service(1 - 12), does some reads, writes and close device. If this cycle is repeated more times (e.g. 2000x) demon crash on ioctl call. I must kill demon and restart him. If I restart him more than 7x MC7304 module crash and must be hw restarted. In router I´m using Gobi driver with sierra patches. I try repeat this with sierra SDK and I was successful.

Have someone encountered with this issue?

Thanks
Marek

2

Hi Marek,

May I clarify, are you seeing the issue only when you send QMI command directly from your daemons?
Any problem using Sierra QMI SDK?

Thanks.

3

I’m able to repeat this even with QMI SDK. Now I’m in contact with sierra support . I get patch from them and I must test it. In attach is breaking program, it must be repeated more than 2000 in loop.
start_sdk.c (5.74 KB)