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From:   Thomas Bogendoerfer <tbogendoerfer@suse.de>
To:     Jonathan Corbet <corbet@lwn.net>,
        Ralf Baechle <ralf@linux-mips.org>,
        Paul Burton <paul.burton@mips.com>,
        James Hogan <jhogan@kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Lee Jones <lee.jones@linaro.org>,
        "David S. Miller" <davem@davemloft.net>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Alessandro Zummo <a.zummo@towertech.it>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jslaby@suse.com>,
        Evgeniy Polyakov <zbr@ioremap.net>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
        linux-input@vger.kernel.org, netdev@vger.kernel.org,
        linux-rtc@vger.kernel.org, linux-serial@vger.kernel.org
Subject: [PATCH v5 11/17] net: sgi: ioc3-eth: no need to stop queue set_multicast_list
Date:   Mon, 19 Aug 2019 18:31:34 +0200
Message-Id: <20190819163144.3478-12-tbogendoerfer@suse.de>
In-Reply-To: <20190819163144.3478-1-tbogendoerfer@suse.de>
References: <20190819163144.3478-1-tbogendoerfer@suse.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

netif_stop_queue()/netif_wake_qeue() aren't needed for changing
multicast filters. Use spinlocks instead for proper protection
of private struct.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d862f28887f9..7f85a3bfef14 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1542,8 +1542,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 	struct netdev_hw_addr *ha;
 	u64 ehar = 0;
 
-	netif_stop_queue(dev);				/* Lock out others. */
-
+	spin_lock_irq(&ip->ioc3_lock);
 	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous.  */
 		ip->emcr |= EMCR_PROMISC;
 		writel(ip->emcr, &regs->emcr);
@@ -1572,7 +1571,7 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 		writel(ip->ehar_l, &regs->ehar_l);
 	}
 
-	netif_wake_queue(dev);			/* Let us get going again. */
+	spin_unlock_irq(&ip->ioc3_lock);
 }
 
 module_pci_driver(ioc3_driver);
-- 
2.13.7