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From: Christian Marangi <ansuelsmth@gmail.com>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Christian Marangi <ansuelsmth@gmail.com>
Subject: [net-next PATCH RFC 2/5] net: ethernet: stmicro: stmmac: first disable all queues in release
Date: Tue, 28 Jun 2022 03:33:39 +0200	[thread overview]
Message-ID: <20220628013342.13581-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20220628013342.13581-1-ansuelsmth@gmail.com>

Disable all queues before tx_disable in stmmac_release to prevent a
corner case where packet may be still queued at the same time tx_disable
is called resulting in kernel panic if some packet still has to be
processed.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f861246de2e5..f4ba27c1c7e0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3756,6 +3756,11 @@ static int stmmac_release(struct net_device *dev)
 	struct stmmac_priv *priv = netdev_priv(dev);
 	u32 chan;
 
+	stmmac_disable_all_queues(priv);
+
+	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
+		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
+
 	netif_tx_disable(dev);
 
 	if (device_may_wakeup(priv->device))
@@ -3764,11 +3769,6 @@ static int stmmac_release(struct net_device *dev)
 	phylink_stop(priv->phylink);
 	phylink_disconnect_phy(priv->phylink);
 
-	stmmac_disable_all_queues(priv);
-
-	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
-		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
-
 	/* Free the IRQ lines */
 	stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0);
 
-- 
2.36.1


WARNING: multiple messages have this Message-ID (diff)
From: Christian Marangi <ansuelsmth@gmail.com>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Christian Marangi <ansuelsmth@gmail.com>
Subject: [net-next PATCH RFC 2/5] net: ethernet: stmicro: stmmac: first disable all queues in release
Date: Tue, 28 Jun 2022 03:33:39 +0200	[thread overview]
Message-ID: <20220628013342.13581-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20220628013342.13581-1-ansuelsmth@gmail.com>

Disable all queues before tx_disable in stmmac_release to prevent a
corner case where packet may be still queued at the same time tx_disable
is called resulting in kernel panic if some packet still has to be
processed.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f861246de2e5..f4ba27c1c7e0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3756,6 +3756,11 @@ static int stmmac_release(struct net_device *dev)
 	struct stmmac_priv *priv = netdev_priv(dev);
 	u32 chan;
 
+	stmmac_disable_all_queues(priv);
+
+	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
+		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
+
 	netif_tx_disable(dev);
 
 	if (device_may_wakeup(priv->device))
@@ -3764,11 +3769,6 @@ static int stmmac_release(struct net_device *dev)
 	phylink_stop(priv->phylink);
 	phylink_disconnect_phy(priv->phylink);
 
-	stmmac_disable_all_queues(priv);
-
-	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
-		hrtimer_cancel(&priv->tx_queue[chan].txtimer);
-
 	/* Free the IRQ lines */
 	stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0);
 
-- 
2.36.1


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  parent reply	other threads:[~2022-06-28  1:34 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-28  1:33 [net-next PATCH RFC 0/5] Add MTU change with stmmac interface running Christian Marangi
2022-06-28  1:33 ` Christian Marangi
2022-06-28  1:33 ` [net-next PATCH RFC 1/5] net: ethernet: stmicro: stmmac: move queue reset to dedicated functions Christian Marangi
2022-06-28  1:33   ` Christian Marangi
2022-06-28  1:33 ` Christian Marangi [this message]
2022-06-28  1:33   ` [net-next PATCH RFC 2/5] net: ethernet: stmicro: stmmac: first disable all queues in release Christian Marangi
2022-06-29  3:54   ` Jakub Kicinski
2022-06-29  3:54     ` Jakub Kicinski
2022-06-29 10:44     ` Christian Marangi
2022-06-29 10:44       ` Christian Marangi
2022-06-28  1:33 ` [net-next PATCH RFC 3/5] net: ethernet: stmicro: stmmac: move dma conf to dedicated struct Christian Marangi
2022-06-28  1:33   ` Christian Marangi
2022-06-28  1:33 ` [net-next PATCH RFC 4/5] net: ethernet: stmicro: stmmac: generate stmmac dma conf before open Christian Marangi
2022-06-28  1:33   ` Christian Marangi
2022-06-28  1:33 ` [net-next PATCH RFC 5/5] net: ethernet: stmicro: stmmac: permit MTU change with interface up Christian Marangi
2022-06-28  1:33   ` Christian Marangi
2022-06-29  3:58 ` [net-next PATCH RFC 0/5] Add MTU change with stmmac interface running Jakub Kicinski
2022-06-29  3:58   ` Jakub Kicinski

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