wifi: ath12k: Fix invalid IRQ requests during AHB probe

ath12k_ahb_config_ext_irq() iterates over ATH12K_EXT_IRQ_NUM_MAX (16)
entries while checking TX ring masks, but the tcl_to_wbm_rbm_map array
contains only DP_TCL_NUM_RING_MAX (4) valid elements.

When the iterator (j) is greater than or equal to DP_TCL_NUM_RING_MAX,
it accesses tcl_to_wbm_rbm_map[j] out of bounds. This results in
reading uninitialized memory for wbm_ring_num, causing the driver to
evaluate incorrect BIT() conditions and request IRQs for rings that do
not have an assigned interrupt line or device tree entry.

This leads to request_irq() failures with -ENXIO or -EINVAL during
ath12k AHB probe.

Fix this by splitting the loop into two separate loops: one iterating
over DP_TCL_NUM_RING_MAX for TX ring, and another iterating over
ATH12K_EXT_IRQ_NUM_MAX for remaining IRQ entries.
Also add a bounds check for num_irq.

Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.6-01275-QCAHKSWPL_SILICONZ-1

Fixes: 6cee30f0da75 ("wifi: ath12k: add AHB driver support for IPQ5332")
Signed-off-by: Aaradhana Sahu <aaradhana.sahu@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Link: https://patch.msgid.link/20260414062829.2371761-1-aaradhana.sahu@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions