wifi: ath11k: disable wake IRQ on AHB suspend failure

ath11k_ahb_hif_suspend() enables the wake IRQ before sending the SMP2P power-save-enter message. If qcom_smem_state_update_bits() fails, the function returns without balancing enable_irq_wake(). The WoW suspend error path does not call ath11k_ahb_hif_resume(), so its wake IRQ cleanup does not undo this enable.

Disable the wake IRQ before returning the SMP2P error. Warn if disabling it also fails, while preserving the original error code.

This issue was identified during our ongoing static-analysis research while reviewing kernel code.

---
 drivers/net/wireless/ath/ath11k/ahb.c | 2 ++
 1 file changed, 2 insertions(+)

index ec5bf5c..3c9de95 100644
@@ -742,6 +742,8 @@ static int ath11k_ahb_hif_suspend(struct ath11k_base *ab)
 					  ATH11K_AHB_SMP2P_SMEM_VALUE_MASK, value);
 	if (ret) {
 		ath11k_err(ab, "failed to send smp2p power save enter cmd :%d\n", ret);
+		if (disable_irq_wake(wake_irq))
+			ath11k_warn(ab, "failed to disable wakeup irq on suspend failure\n");
 		return ret;
 	}
 

base-commit: 08df884136f1c1197bab2a27814404fd329d9aac

2.50.1