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From 1a8a8989b779e51e4652a30e9f22c36a1b6ffc4b Mon Sep 17 00:00:00 2001
From: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Thu, 20 Dec 2018 16:16:11 +0100
X-Patchwork-Submitter: Stanislaw Gruszka <sgruszka@redhat.com>
X-Patchwork-Id: 10739037
X-Patchwork-Delegate: kvalo@adurom.com
Subject: [PATCH 20/28] rt2x00: do not print error when queue is full

For unknown reasons printk() on some context can cause CPU hung on
embedded MT7620 AP/router MIPS platforms. What can result on wifi
disconnects.

This patch move queue full messages to debug level what is consistent
with other mac80211 drivers which drop packet silently if tx queue is
full. This make MT7620 OpenWRT routers more stable, what was reported
by various users.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
 drivers/net/wireless/ralink/rt2x00/rt2x00queue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
@@ -671,7 +671,7 @@ int rt2x00queue_write_tx_frame(struct da
        spin_lock(&queue->tx_lock);
 
        if (unlikely(rt2x00queue_full(queue))) {
-               rt2x00_err(queue->rt2x00dev, "Dropping frame due to full tx queue %d\n",
+               rt2x00_dbg(queue->rt2x00dev, "Dropping frame due to full tx queue %d\n",
                           queue->qid);
                ret = -ENOBUFS;
                goto out;