Re: [PATCH v2 3/4] wifi: ath11k: Connect to the QMI server belonging to the device owned by this driver

["Juha-Matti Tilli" <juha-matti.tilli@iki.fi>]

On Mon, Sep 21, 2026, at 14:23, Manivannan Sadhasivam via B4 Relay wrote:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> 
> When two identical ath11k PCIe devices are connected to the same host, both
> advertise the WLFW service with the same service and instance id. The QMI
> lookup reports both servers to each device, so a device may connect to the
> firmware running on the other device.
> 
> But now, QRTR provides each MHI endpoint a unique node id which is
> different from the node id announced by the device. So use the same id to
> pick the correct server. Add a get_qrtr_node_id() HIF callback that returns
> the node id derived from the MHI controller index and zero for transports
> that do not assign one. In the new_server callback, skip any service whose
> node id does not match. A node id of zero disables the check, so transports
> that do not assign one keep their current behavior.

Tested-by: Juha-Matti Tilli <juha-matti.tilli@iki.fi>
Tested-on: 2x WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1

That's from the new rebased patches, v2, applied with git am.

Again, I picked the entire QRTR from net-next/main after your changes,
and backported the ath11k and ath12k changes to 6.6.157 kernel. The
conflicts in ath11k and ath12k are really simple to resolve. The QRTR is
better to take as-is, as it's a large and substantially modified piece
of code, and backporting could risk different behavior.

Unfortunately, it seems I'm locked to 6.6 kernel until I manage to boot
a newer kernel. I tested 6.12 series and my perfectly valid gzipped
initrd ext2 file system is recognised as gzipped, but mounting the root
from /dev/ram0 fails due to -EBUSY. Why this happens with 6.12.x but not
6.6.157 is a mystery to me. Prompting two AI models didn't help, they
keep on just repeating the same useless points. So I have to resort to
heavier weapons, printk and maybe even git bisect.

So, because 6.6 kernel in our CPU doesn't work with ath12k due to lack
of interrupts and I can't boot a newer kernel yet, you'll have to either
find someone with two ath12k cards, or just accept to test the ath12k
change with a single card and hope for the best.

My understanding is that 6.12 would support just 1 interrupt in ath12k.
If I could only boot it, that is.

BR, Juha-Matti