[PATCH] wifi: ath12k: assign device id from the WSI index

[Benoit Masson]

Devices of a hardware group are added to ag->ab[] in PCI probe
completion order (ab->device_id = ag->num_probed++). The wiphy radio
array is built from ag->ab[] and the wiphy device is taken from its
first entry, so the wiphy path and the radio index to band mapping
change on every boot.

Store each ab in ag->ab[] at its wsi_info.index, which is derived from
the device tree WSI ring. The group order is then deterministic.
ag->num_probed remains the group device counter. The unassign path is
unchanged, it already indexes ag->ab[] by ab->device_id.

Verified on TP-Link Archer BE800 (three single-band radios in one
group): the wiphy path and the radio index to band mapping are
identical across cold boots.

Fixes: 6f245ea0ec6c ("wifi: ath12k: introduce device group abstraction")
Cc: stable at vger.kernel.org # 6.14+
Signed-off-by: Benoit Masson <yahoo at perenite.com>
---
Changes in v2:
- Set ab->device_id from wsi_info.index in ath12k_core_hw_group_assign()
  instead of reordering pdev_map[] in ath12k_mac_allocate(), as suggested
  by Rameshkumar. mac.c is no longer modified.
---
 drivers/net/wireless/ath/ath12k/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 262a204..f43319f 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -2029,7 +2029,8 @@ exit:
 		goto invalid_group;
 	}
 
-	ab->device_id = ag->num_probed++;
+	ag->num_probed++;
+	ab->device_id = wsi->index;
 	ag->ab[ab->device_id] = ab;
 	ab->ag = ag;
 
-- 
2.54.0 (Apple Git-157)