76 lines
2.0 KiB
Diff
76 lines
2.0 KiB
Diff
From: Marcin Wojtas <mw@semihalf.com>
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Date: Fri, 1 Apr 2016 15:21:18 +0200
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Subject: [PATCH] net: mvneta: fix changing MTU when using per-cpu processing
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After enabling per-cpu processing it appeared that under heavy load
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changing MTU can result in blocking all port's interrupts and
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transmitting data is not possible after the change.
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This commit fixes above issue by disabling percpu interrupts for the
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time, when TXQs and RXQs are reconfigured.
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Signed-off-by: Marcin Wojtas <mw@semihalf.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/drivers/net/ethernet/marvell/mvneta.c
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+++ b/drivers/net/ethernet/marvell/mvneta.c
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@@ -3045,6 +3045,20 @@ static int mvneta_check_mtu_valid(struct
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return mtu;
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}
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+static void mvneta_percpu_enable(void *arg)
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+{
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+ struct mvneta_port *pp = arg;
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+
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+ enable_percpu_irq(pp->dev->irq, IRQ_TYPE_NONE);
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+}
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+
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+static void mvneta_percpu_disable(void *arg)
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+{
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+ struct mvneta_port *pp = arg;
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+
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+ disable_percpu_irq(pp->dev->irq);
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+}
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+
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/* Change the device mtu */
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static int mvneta_change_mtu(struct net_device *dev, int mtu)
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{
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@@ -3069,6 +3083,7 @@ static int mvneta_change_mtu(struct net_
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* reallocation of the queues
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*/
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mvneta_stop_dev(pp);
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+ on_each_cpu(mvneta_percpu_disable, pp, true);
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mvneta_cleanup_txqs(pp);
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mvneta_cleanup_rxqs(pp);
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@@ -3092,6 +3107,7 @@ static int mvneta_change_mtu(struct net_
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return ret;
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}
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+ on_each_cpu(mvneta_percpu_enable, pp, true);
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mvneta_start_dev(pp);
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netdev_update_features(dev);
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@@ -3244,20 +3260,6 @@ static void mvneta_mdio_remove(struct mv
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pp->phy_dev = NULL;
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}
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-static void mvneta_percpu_enable(void *arg)
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-{
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- struct mvneta_port *pp = arg;
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-
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- enable_percpu_irq(pp->dev->irq, IRQ_TYPE_NONE);
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-}
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-
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-static void mvneta_percpu_disable(void *arg)
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-{
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- struct mvneta_port *pp = arg;
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-
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- disable_percpu_irq(pp->dev->irq);
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-}
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-
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/* Electing a CPU must be done in an atomic way: it should be done
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* after or before the removal/insertion of a CPU and this function is
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* not reentrant.
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