From: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Date: Fri, 30 Aug 2019 09:25:37 +0000 (+0200)
Subject: net: sgi: ioc3-eth: protect emcr in all cases
X-Git-Tag: v5.4-rc1~131^2~116^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=d1c9454274d84671737574ec21c69f26c0433307;p=linux.git

net: sgi: ioc3-eth: protect emcr in all cases

emcr in private struct wasn't always protected by spinlock.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 971986433d4c..963ed0f9787c 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -729,6 +729,8 @@ static inline void ioc3_setup_duplex(struct ioc3_private *ip)
 {
 	struct ioc3_ethregs *regs = ip->regs;
 
+	spin_lock_irq(&ip->ioc3_lock);
+
 	if (ip->mii.full_duplex) {
 		writel(ETCSR_FD, &regs->etcsr);
 		ip->emcr |= EMCR_DUPLEX;
@@ -737,6 +739,8 @@ static inline void ioc3_setup_duplex(struct ioc3_private *ip)
 		ip->emcr &= ~EMCR_DUPLEX;
 	}
 	writel(ip->emcr, &regs->emcr);
+
+	spin_unlock_irq(&ip->ioc3_lock);
 }
 
 static void ioc3_timer(struct timer_list *t)
@@ -1625,6 +1629,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 
 	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);
@@ -1653,6 +1659,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
 		writel(ip->ehar_l, &regs->ehar_l);
 	}
 
+	spin_unlock_irq(&ip->ioc3_lock);
+
 	netif_wake_queue(dev);			/* Let us get going again. */
 }