qcacmn: Drop gen2 spectral samples after spectral scan is stopped

The host can receive some spectral samples even after stopping the scan
as there could be some samples already sitting in the WMI event pipe.
Drop those frames in the driver itself.

CRs-Fixed: 3014336
Change-Id: I8aece67b46aa84e974b538f40ffcb937c855f5a3

target_if/spectral/target_if_spectral_phyerr.c

@@ -1428,11 +1428,21 @@ target_if_process_phyerr_gen2(struct target_if_spectral *spectral,
 	uint8_t segid_sec80;
 	enum phy_ch_width ch_width;
 	QDF_STATUS ret;
+	struct target_if_spectral_ops *p_sops;
 
 	if (!spectral) {
 		spectral_err_rl("Spectral LMAC object is null");
 		goto fail;
 	}
+
+	p_sops = GET_TARGET_IF_SPECTRAL_OPS(spectral);
+	/* Drop the sample if Spectral is not active */
+	if (!p_sops->is_spectral_active(spectral,
+					SPECTRAL_SCAN_MODE_NORMAL)) {
+		spectral_info_rl("Spectral scan is not active");
+		goto fail_no_print;
+	}
+
 	if (!data) {
 		spectral_err_rl("Phyerror event buffer is null");
 		goto fail;
@@ -1616,10 +1626,12 @@ target_if_process_phyerr_gen2(struct target_if_spectral *spectral,
 	return 0;
 
 fail:
+	spectral_err_rl("Error while processing Spectral report");
+
+fail_no_print:
 	if (spectral_debug_level & DEBUG_SPECTRAL4)
 		spectral_debug_level = DEBUG_SPECTRAL;
 
-	spectral_err_rl("Error while processing Spectral report");
 	free_samp_msg_skb(spectral, SPECTRAL_SCAN_MODE_NORMAL);
 	return -EPERM;
 }