[FS#53] uqmi not working with newer Modems like Sierra Wireless EM7455

[LEDE Bugs]

The following task has a new comment added:

FS#53 - uqmi not working with newer Modems like Sierra Wireless EM7455
User who did this - Bjørn Mork (bmork)

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This hasn't so much to do with uqmi, but with the kernel (or rather driver) version. The features necessary for MC74xx/EM74xx were added in v4.5, and have not been backported to any earlier stable kernels AFAIK. You'll need the raw-ip support for a fully working EM7455 in QMI mode, and those changes are just too intrusive to qualify for stable.  Sorry.  You'll have to use a newer kernel.

Or go for MBIM.  There were of course some issues there as well, but they were minor and have been backported now.

FYI: The uqmi problems are probable caused by this patch missing in v4.4:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/usb/qmi_wwan.c?id=93725149794d3d418cf1eddcae60c7b536c5faa1

But as I said: That's not enough.  You need the raw-ip support too.



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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=53#comment274