ath10k: check otp.bin result

When we execute otp.bin in the target check that the result it returns doesn't
contain an error. This is to make sure that we don't accidentally use invalid
calibration data.

While at it, remove the useless label in the function and add few debug messages.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/core.c

@@ -254,23 +254,34 @@ static int ath10k_download_and_run_otp(struct ath10k *ar)
 
 	/* OTP is optional */
 
-	if (!ar->otp_data || !ar->otp_len)
+	if (!ar->otp_data || !ar->otp_len) {
+		ath10k_warn("Not running otp, calibration will be incorrect!\n");
 		return 0;
+	}
+
+	ath10k_dbg(ATH10K_DBG_BOOT, "boot upload otp to 0x%x len %zd\n",
+		   address, ar->otp_len);
 
 	ret = ath10k_bmi_fast_download(ar, address, ar->otp_data, ar->otp_len);
 	if (ret) {
 		ath10k_err("could not write otp (%d)\n", ret);
-		goto exit;
+		return ret;
 	}
 
 	ret = ath10k_bmi_execute(ar, address, 0, &result);
 	if (ret) {
 		ath10k_err("could not execute otp (%d)\n", ret);
-		goto exit;
+		return ret;
 	}
 
-exit:
-	return ret;
+	ath10k_dbg(ATH10K_DBG_BOOT, "boot otp execute result %d\n", result);
+
+	if (result != 0) {
+		ath10k_err("otp calibration failed: %d", result);
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 static int ath10k_download_fw(struct ath10k *ar)