Huawei modem (12d1:1573) resets with AT^GETPORTMODE

[David McCullough]

David McCullough wrote the following:
> 
> Hi all,
> 
> Just tried out a new modem module from Huawei (12d1:1573) and it seems get
> quite upset with the AT^GETPORTMODE command.  Without modem manager running
> I can issue this command on any of the suitable tty ports and the modem will
> HW reset after 15 seconds or so.
> 
> Here is a patch that disables the command on this modem,  not sure if this
> is the best way to do it so happy to be pointed in the right direction.

So looks like the correct method for doing this is needed :-)

The patch below is causing me crashes on a different Huawei modem.  It dies
in "mm_device_get_product" because either self is invalid or self->priv is
corrupted.

Sorry for the bad patch, any help to create a correct fix appreciated :-)

Thanks,
Davidm

> diff --git a/plugins/huawei/mm-plugin-huawei.c b/plugins/huawei/mm-plugin-huawei.c
> index 89fe0fc..23cd4eb 100644
> --- a/plugins/huawei/mm-plugin-huawei.c
> +++ b/plugins/huawei/mm-plugin-huawei.c
> @@ -285,6 +285,12 @@ huawei_custom_init_step (HuaweiCustomInitContext *ctx)
>          return;
>      }
>  
> +	/* this particular modem crashes/resets if you run AT^GETPORTMODE */
> +	if (mm_device_get_product (mm_port_get_device (MM_PORT (ctx->port))) == 0x1573) {
> +		ctx->getportmode_done = TRUE;
> +		ctx->getportmode_retries = 0;
> +	}
> +
>      /* Try to get a port map from the modem */
>      if (!ctx->getportmode_done) {
>          if (ctx->getportmode_retries == 0) {
> 
> Signed-off-by: David McCullough <david.mccullough at accelecon.com>
> 
> -- 
> David McCullough,  david.mccullough at accelecon.com,   Ph: 0410 560 763

-- 
David McCullough,  david.mccullough at accelecon.com,   Ph: 0410 560 763