wifi: ath11k: don't wait when there is no vdev started

For WMI_REQUEST_VDEV_STAT request, firmware might split response into
multiple events dut to buffer limit, hence currently in
ath11k_debugfs_fw_stats_process() we wait until all events received.
In case there is no vdev started, this results in that below condition
would never get satisfied

	((++ar->fw_stats.num_vdev_recvd) == total_vdevs_started)

finally the requestor would be blocked until wait time out.

The same applies to WMI_REQUEST_BCN_STAT request as well due to:

	((++ar->fw_stats.num_bcn_recvd) == ar->num_started_vdevs)

Change to check the number of started vdev first: if it is zero, finish
wait directly; if not, follow the old way.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.37

Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20250220082448.31039-4-quic_bqiang@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath11k/debugfs.c b/drivers/net/wireless/ath/ath11k/debugfs.c
index 27c93c0b4c22364a5ad203083c075b7472dfa43a..ccf0e62c7d7aedd4b0dc8bb678ebe37f677c0b3a 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/debugfs.c
+++ b/drivers/net/wireless/ath/ath11k/debugfs.c
@@ -107,7 +107,7 @@ void ath11k_debugfs_fw_stats_process(struct ath11k *ar, struct ath11k_fw_stats *
 {
        struct ath11k_base *ab = ar->ab;
        struct ath11k_pdev *pdev;
-       bool is_end;
+       bool is_end = true;
        size_t total_vdevs_started = 0;
        int i;
 
@@ -132,7 +132,9 @@ void ath11k_debugfs_fw_stats_process(struct ath11k *ar, struct ath11k_fw_stats *
                                total_vdevs_started += ar->num_started_vdevs;
                }
 
-               is_end = ((++ar->fw_stats.num_vdev_recvd) == total_vdevs_started);
+               if (total_vdevs_started)
+                       is_end = ((++ar->fw_stats.num_vdev_recvd) ==
+                                 total_vdevs_started);
 
                list_splice_tail_init(&stats->vdevs,
                                      &ar->fw_stats.vdevs);
@@ -151,7 +153,9 @@ void ath11k_debugfs_fw_stats_process(struct ath11k *ar, struct ath11k_fw_stats *
                /* Mark end until we reached the count of all started VDEVs
                 * within the PDEV
                 */
-               is_end = ((++ar->fw_stats.num_bcn_recvd) == ar->num_started_vdevs);
+               if (ar->num_started_vdevs)
+                       is_end = ((++ar->fw_stats.num_bcn_recvd) ==
+                                 ar->num_started_vdevs);
 
                list_splice_tail_init(&stats->bcn,
                                      &ar->fw_stats.bcn);