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From: Stanislaw Gruszka <sgruszka@redhat.com>
To: linux-wireless@vger.kernel.org
Cc: "Randy Oostdyk" <linux-kernel@oostdyk.com>,
	"Tomislav Požega" <pozega.tomislav@gmail.com>,
	"Daniel Golle" <daniel@makrotopia.org>,
	"Felix Fietkau" <nbd@nbd.name>, "Mathias Kresin" <dev@kresin.me>
Subject: [PATCH v2 3/3] rt2x00: do not print error when queue is full
Date: Thu, 20 Dec 2018 16:16:11 +0100	[thread overview]
Message-ID: <1545318971-28351-3-git-send-email-sgruszka@redhat.com> (raw)
In-Reply-To: <1545318971-28351-1-git-send-email-sgruszka@redhat.com>

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(-)

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c b/drivers/net/wireless/ralink/rt2x00/rt2x00queue.c
index 92ddc19e7bf7..947fc8964e9a 100644
--- 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 data_queue *queue, struct sk_buff *skb,
 	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;
-- 
2.7.5


  parent reply	other threads:[~2018-12-20 15:16 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-20 15:16 [PATCH v2 1/3] rt2x00: use ratelimited variants dev_warn/dev_err Stanislaw Gruszka
2018-12-20 15:16 ` [PATCH v2 2/3] rt2x00: check number of EPROTO errors Stanislaw Gruszka
2019-01-07 12:47   ` Jeroen Roovers
2019-01-07 15:09     ` Stanislaw Gruszka
2019-01-08  9:30       ` Jeroen Roovers
2019-01-08 10:09         ` Jeroen Roovers
2019-01-08 11:04         ` Tom Psyborg
2019-01-09  6:17           ` Jeroen Roovers
2019-01-09 11:33             ` Stanislaw Gruszka
2019-01-10  7:49               ` Jeroen Roovers
2019-01-10 14:29                 ` Jeroen Roovers
2019-01-16 11:11                   ` Stanislaw Gruszka
2019-01-22 17:32                   ` Jeroen Roovers
2019-02-12 15:02                     ` Stanislaw Gruszka
2018-12-20 15:16 ` Stanislaw Gruszka [this message]
2018-12-20 17:52   ` [PATCH v2 3/3] rt2x00: do not print error when queue is full Tom Psyborg
2018-12-21  9:59     ` Stanislaw Gruszka
2018-12-22 13:12       ` Tom Psyborg
2018-12-25 22:43         ` Tom Psyborg
2018-12-27 10:32           ` Stanislaw Gruszka
2018-12-27 10:25         ` Stanislaw Gruszka
2018-12-28  0:45           ` Tom Psyborg
2019-01-02  8:19             ` Stanislaw Gruszka
2019-02-09 11:03               ` Stanislaw Gruszka
2019-02-09 11:11                 ` Tom Psyborg
2019-02-09 11:56                   ` Stanislaw Gruszka
2019-02-09 12:28                     ` Tom Psyborg
2019-02-09 15:38                       ` Daniel Golle
2019-02-09 16:29                         ` Tom Psyborg
2019-02-09 17:28                           ` Daniel Golle
2019-03-19  2:37                             ` Tom Psyborg
2019-02-10  9:57                       ` Stanislaw Gruszka
2018-12-21 11:19 ` [PATCH v2 1/3] rt2x00: use ratelimited variants dev_warn/dev_err Joe Perches
2018-12-21 11:57   ` Stanislaw Gruszka
2018-12-21 12:48     ` Joe Perches
2018-12-21 12:51       ` Stanislaw Gruszka
2019-01-29 12:30     ` Kalle Valo

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