Usage of libqmi APIs

[Sai Chaitanya]

Sorry I missed adding a subject.....

On Wed, Aug 2, 2023 at 4:18 PM Sai Chaitanya <msaichaitanya at gmail.com>
wrote:

> Hi,
>
> I am trying to configure and control a Sierra modem (RC series) connected
> to my Linux PC with an experimental code put together from different
> sources in the internet and libqmi API manual. The sample code is attached.
> I am not sure if there is any issue with the way I am using the libqmi
> APIs, but the code seems to work for most of the time, but rarely it gets
> stuck in g_poll() even though I am using timeouts in each and every libqmi
> API used.
>
> #0 0x0000007fb0297e6c in _*GI*__poll (fds=fds at entry=0x7fdea36d30,
> nfds=nfds at entry=1, timeout=timeout at entry=-1)
> at /usr/src/debug/glibc/2.36-r0/sysdeps/unix/sysv/linux/poll.c:41
> #1 0x0000007fb04a7c6c in g_poll (fds=fds at entry=0x7fdea36d30,
> nfds=nfds at entry=1, timeout=timeout at entry=-1)
> at /usr/src/debug/glib-2.0/1_2.72.3-r0/glib/gpoll.c:125
> #2 0x0000007fb06e7708 in g_unix_input_stream_read (stream=<optimized out>,
> buffer=0x7fdea36d78, count=2048, cancellable=0x0,
> error=0x7fdea36d70) at
> /usr/src/debug/glib-2.0/1_2.72.3-r0/gio/gunixinputstream.c:348
> #3 0x0000007faf128960 in input_ready_cb (istream=0x558e7c5660,
> self=0x558e7c4f10)
> at /usr/src/debug/libqmi/1.32.4-r0/src/libqmi-glib/qmi-endpoint-qmux.c:73
> #4 0x0000007fb0497f7c in g_main_dispatch (context=0x558e7527f0) at
> /usr/src/debug/glib-2.0/1_2.72.3-r0/glib/gmain.c:3417
> #5 g_main_context_dispatch (context=context at entry=0x558e7527f0) at
> /usr/src/debug/glib-2.0/1_2.72.3-r0/glib/gmain.c:4135
> #6 0x0000007fb049832c in g_main_context_iterate (context=0x558e7527f0,
> block=block at entry=1, dispatch=dispatch at entry=1,
> self=<optimized out>) at
> /usr/src/debug/glib-2.0/1_2.72.3-r0/glib/gmain.c:4211
> #7 0x0000007fb04986a8 in g_main_loop_run (loop=0x558e752b90) at
> /usr/src/debug/glib-2.0/1_2.72.3-r0/glib/gmain.c:4411
>
> The same code works fine with no issues with a 4G dongle. I am not sure if
> there is any limitation in the Sierra modem or any unhandled case in
> libqmi, specific to this Sierra modem I am using. Any inputs that can shed
> some light onto this issue are highly appreciated.
>
> Kind regards,
> Sai.
>


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