ath11k: cleanup reo command error code overwritten

should not overwrite the error code. No buffer available then return
invalid. For other failures return the error code of actual failure.
Signed-off-by: Govindaraj Saminathan <gsamin@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1586776872-25766-1-git-send-email-gsamin@codeaurora.org

drivers/net/wireless/ath/ath11k/dp_tx.c

@@ -543,8 +543,12 @@ int ath11k_dp_tx_send_reo_cmd(struct ath11k_base *ab, struct dp_rx_tid *rx_tid,
 	cmd_ring = &ab->hal.srng_list[dp->reo_cmd_ring.ring_id];
 	cmd_num = ath11k_hal_reo_cmd_send(ab, cmd_ring, type, cmd);
 
+	/* cmd_num should start from 1, during failure return the error code */
+	if (cmd_num < 0)
+		return cmd_num;
+
 	/* reo cmd ring descriptors has cmd_num starting from 1 */
-	if (cmd_num <= 0)
+	if (cmd_num == 0)
 		return -EINVAL;
 
 	if (!cb)