Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/netdev-2.6

* 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/netdev-2.6:
  [PATCH] bcm43xx: Fix access to non-existent PHY registers
  [PATCH] bcm43xx: Fix array overrun in bcm43xx_geo_init
  [PATCH] bcm43xx: check for valid MAC address in SPROM
  [PATCH] ieee80211: Fix A band channel count (resent)
  [PATCH] bcm43xx: fix iwmode crash when down
  [PATCH] softmac: make non-operational after being stopped
  [PATCH] softmac: don't reassociate if user asked for deauthentication
  spidernet: enable support for bcm5461 ethernet phy
  spidernet: introduce new setting
  Fix RTL8019AS init for Toshiba RBTX49xx boards
  au1000_eth.c: use ether_crc() from <linux/crc32.h>
  sky2: version 1.3
  Add more support for the Yukon Ultra chip found in dual core centino laptops.
  sky2: synchronize irq on remove
  sky2: dont write status ring
  sky2: edge triggered workaround enhancement
  sky2: use mask instead of modulo operation
  sky2: tx ring index mask fix
  sky2: status irq hang fix
  sky2: backout NAPI reschedule

drivers/net/au1000_eth.c

@@ -52,6 +52,7 @@
 #include <linux/mii.h>
 #include <linux/skbuff.h>
 #include <linux/delay.h>
+#include <linux/crc32.h>
 #include <asm/mipsregs.h>
 #include <asm/irq.h>
 #include <asm/io.h>
@@ -2070,23 +2071,6 @@ static void au1000_tx_timeout(struct net_device *dev)
 	netif_wake_queue(dev);
 }
 
-
-static unsigned const ethernet_polynomial = 0x04c11db7U;
-static inline u32 ether_crc(int length, unsigned char *data)
-{
-    int crc = -1;
-
-    while(--length >= 0) {
-		unsigned char current_octet = *data++;
-		int bit;
-		for (bit = 0; bit < 8; bit++, current_octet >>= 1)
-			crc = (crc << 1) ^
-				((crc < 0) ^ (current_octet & 1) ? 
-				 ethernet_polynomial : 0);
-    }
-    return crc;
-}
-
 static void set_rx_mode(struct net_device *dev)
 {
 	struct au1000_private *aup = (struct au1000_private *) dev->priv;

drivers/net/ne.c

@@ -139,8 +139,9 @@ bad_clone_list[] __initdata = {
 
 #if defined(CONFIG_PLAT_MAPPI)
 #  define DCR_VAL 0x4b
-#elif defined(CONFIG_PLAT_OAKS32R)
-#  define DCR_VAL 0x48
+#elif defined(CONFIG_PLAT_OAKS32R)  || \
+   defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
+#  define DCR_VAL 0x48		/* 8-bit mode */
 #else
 #  define DCR_VAL 0x49
 #endif
@@ -396,10 +397,22 @@ static int __init ne_probe1(struct net_device *dev, int ioaddr)
 		/* We must set the 8390 for word mode. */
 		outb_p(DCR_VAL, ioaddr + EN0_DCFG);
 		start_page = NESM_START_PG;
-		stop_page = NESM_STOP_PG;
+
+		/*
+		 * Realtek RTL8019AS datasheet says that the PSTOP register
+		 * shouldn't exceed 0x60 in 8-bit mode.
+		 * This chip can be identified by reading the signature from
+		 * the  remote byte count registers (otherwise write-only)...
+		 */
+		if ((DCR_VAL & 0x01) == 0 &&		/* 8-bit mode */
+		    inb(ioaddr + EN0_RCNTLO) == 0x50 &&
+		    inb(ioaddr + EN0_RCNTHI) == 0x70)
+			stop_page = 0x60;
+		else
+			stop_page = NESM_STOP_PG;
 	} else {
 		start_page = NE1SM_START_PG;
-		stop_page = NE1SM_STOP_PG;
+		stop_page  = NE1SM_STOP_PG;
 	}
 
 #if  defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
@@ -509,15 +522,9 @@ static int __init ne_probe1(struct net_device *dev, int ioaddr)
 	ei_status.name = name;
 	ei_status.tx_start_page = start_page;
 	ei_status.stop_page = stop_page;
-#if defined(CONFIG_TOSHIBA_RBTX4927) || defined(CONFIG_TOSHIBA_RBTX4938)
-	wordlength = 1;
-#endif
 
-#ifdef CONFIG_PLAT_OAKS32R
-	ei_status.word16 = 0;
-#else
-	ei_status.word16 = (wordlength == 2);
-#endif
+	/* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
+	ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
 
 	ei_status.rx_start_page = start_page + TX_PAGES;
 #ifdef PACKETBUF_MEMSIZE

drivers/net/sky2.h

@@ -378,6 +378,9 @@ enum {
 	CHIP_REV_YU_EC_A1    = 0,  /* Chip Rev. for Yukon-EC A1/A0 */
 	CHIP_REV_YU_EC_A2    = 1,  /* Chip Rev. for Yukon-EC A2 */
 	CHIP_REV_YU_EC_A3    = 2,  /* Chip Rev. for Yukon-EC A3 */
+
+	CHIP_REV_YU_EC_U_A0  = 0,
+	CHIP_REV_YU_EC_U_A1  = 1,
 };
 
 /*	B2_Y2_CLK_GATE	 8 bit	Clock Gating (Yukon-2 only) */

drivers/net/spider_net.c

@@ -1652,6 +1652,8 @@ spider_net_enable_card(struct spider_net_card *card)
 		{ SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
 
 		{ SPIDER_NET_GMRWOLCTRL, 0 },
+		{ SPIDER_NET_GTESTMD, 0x10000000 },
+		{ SPIDER_NET_GTTQMSK, 0x00400040 },
 		{ SPIDER_NET_GTESTMD, 0 },
 
 		{ SPIDER_NET_GMACINTEN, 0 },
@@ -1792,15 +1794,7 @@ spider_net_setup_phy(struct spider_net_card *card)
 	if (phy->def->ops->setup_forced)
 		phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
 
-	/* the following two writes could be moved to sungem_phy.c */
-	/* enable fiber mode */
-	spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020);
-	/* LEDs active in both modes, autosense prio = fiber */
-	spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f);
-
-	/* switch off fibre autoneg */
-	spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0xfc01);
-	spider_net_write_phy(card->netdev, 1, 0x0b, 0x0004);
+	phy->def->ops->enable_fiber(phy);
 
 	phy->def->ops->read_link(phy);
 	pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,

drivers/net/spider_net.h

@@ -120,6 +120,8 @@ extern char spider_net_driver_name[];
 #define SPIDER_NET_GMRUAFILnR		0x00000500
 #define SPIDER_NET_GMRUA0FIL15R		0x00000578
 
+#define SPIDER_NET_GTTQMSK		0x00000934
+
 /* RX DMA controller registers, all 0x00000a.. are for DMA controller A,
  * 0x00000b.. for DMA controller B, etc. */
 #define SPIDER_NET_GDADCHA		0x00000a00

drivers/net/sungem_phy.c

@@ -329,6 +329,30 @@ static int bcm5421_init(struct mii_phy* phy)
 	return 0;
 }
 
+static int bcm5421_enable_fiber(struct mii_phy* phy)
+{
+	/* enable fiber mode */
+	phy_write(phy, MII_NCONFIG, 0x9020);
+	/* LEDs active in both modes, autosense prio = fiber */
+	phy_write(phy, MII_NCONFIG, 0x945f);
+
+	/* switch off fibre autoneg */
+	phy_write(phy, MII_NCONFIG, 0xfc01);
+	phy_write(phy, 0x0b, 0x0004);
+
+	return 0;
+}
+
+static int bcm5461_enable_fiber(struct mii_phy* phy)
+{
+        phy_write(phy, MII_NCONFIG, 0xfc0c);
+        phy_write(phy, MII_BMCR, 0x4140);
+        phy_write(phy, MII_NCONFIG, 0xfc0b);
+	phy_write(phy, MII_BMCR, 0x0140);
+
+	return 0;
+}
+
 static int bcm54xx_setup_aneg(struct mii_phy *phy, u32 advertise)
 {
 	u16 ctl, adv;
@@ -762,6 +786,7 @@ static struct mii_phy_ops bcm5421_phy_ops = {
 	.setup_forced	= bcm54xx_setup_forced,
 	.poll_link	= genmii_poll_link,
 	.read_link	= bcm54xx_read_link,
+	.enable_fiber   = bcm5421_enable_fiber,
 };
 
 static struct mii_phy_def bcm5421_phy_def = {
@@ -792,6 +817,25 @@ static struct mii_phy_def bcm5421k2_phy_def = {
 	.ops		= &bcm5421k2_phy_ops
 };
 
+static struct mii_phy_ops bcm5461_phy_ops = {
+	.init		= bcm5421_init,
+	.suspend	= generic_suspend,
+	.setup_aneg	= bcm54xx_setup_aneg,
+	.setup_forced	= bcm54xx_setup_forced,
+	.poll_link	= genmii_poll_link,
+	.read_link	= bcm54xx_read_link,
+	.enable_fiber   = bcm5461_enable_fiber,
+};
+
+static struct mii_phy_def bcm5461_phy_def = {
+	.phy_id		= 0x002060c0,
+	.phy_id_mask	= 0xfffffff0,
+	.name		= "BCM5461",
+	.features	= MII_GBIT_FEATURES,
+	.magic_aneg	= 1,
+	.ops		= &bcm5461_phy_ops
+};
+
 /* Broadcom BCM 5462 built-in Vesta */
 static struct mii_phy_ops bcm5462V_phy_ops = {
 	.init		= bcm5421_init,
@@ -857,6 +901,7 @@ static struct mii_phy_def* mii_phy_table[] = {
 	&bcm5411_phy_def,
 	&bcm5421_phy_def,
 	&bcm5421k2_phy_def,
+	&bcm5461_phy_def,
 	&bcm5462V_phy_def,
 	&marvell_phy_def,
 	&genmii_phy_def,

drivers/net/sungem_phy.h

@@ -12,6 +12,7 @@ struct mii_phy_ops
 	int		(*setup_forced)(struct mii_phy *phy, int speed, int fd);
 	int		(*poll_link)(struct mii_phy *phy);
 	int		(*read_link)(struct mii_phy *phy);
+	int		(*enable_fiber)(struct mii_phy *phy);
 };
 
 /* Structure used to statically define an mii/gii based PHY */

drivers/net/wireless/bcm43xx/bcm43xx_main.c

@@ -939,9 +939,9 @@ static int bcm43xx_sprom_extract(struct bcm43xx_private *bcm)
 	return 0;
 }
 
-static void bcm43xx_geo_init(struct bcm43xx_private *bcm)
+static int bcm43xx_geo_init(struct bcm43xx_private *bcm)
 {
-	struct ieee80211_geo geo;
+	struct ieee80211_geo *geo;
 	struct ieee80211_channel *chan;
 	int have_a = 0, have_bg = 0;
 	int i;
@@ -949,7 +949,10 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm)
 	struct bcm43xx_phyinfo *phy;
 	const char *iso_country;
 
-	memset(&geo, 0, sizeof(geo));
+	geo = kzalloc(sizeof(*geo), GFP_KERNEL);
+	if (!geo)
+		return -ENOMEM;
+
 	for (i = 0; i < bcm->nr_80211_available; i++) {
 		phy = &(bcm->core_80211_ext[i].phy);
 		switch (phy->type) {
@@ -967,31 +970,36 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm)
 	iso_country = bcm43xx_locale_iso(bcm->sprom.locale);
 
  	if (have_a) {
-		for (i = 0, channel = 0; channel < 201; channel++) {
-			chan = &geo.a[i++];
+		for (i = 0, channel = IEEE80211_52GHZ_MIN_CHANNEL;
+		      channel <= IEEE80211_52GHZ_MAX_CHANNEL; channel++) {
+			chan = &geo->a[i++];
 			chan->freq = bcm43xx_channel_to_freq_a(channel);
 			chan->channel = channel;
 		}
-		geo.a_channels = i;
+		geo->a_channels = i;
 	}
 	if (have_bg) {
-		for (i = 0, channel = 1; channel < 15; channel++) {
-			chan = &geo.bg[i++];
+		for (i = 0, channel = IEEE80211_24GHZ_MIN_CHANNEL;
+		      channel <= IEEE80211_24GHZ_MAX_CHANNEL; channel++) {
+			chan = &geo->bg[i++];
 			chan->freq = bcm43xx_channel_to_freq_bg(channel);
 			chan->channel = channel;
 		}
-		geo.bg_channels = i;
+		geo->bg_channels = i;
 	}
-	memcpy(geo.name, iso_country, 2);
+	memcpy(geo->name, iso_country, 2);
 	if (0 /*TODO: Outdoor use only */)
-		geo.name[2] = 'O';
+		geo->name[2] = 'O';
 	else if (0 /*TODO: Indoor use only */)
-		geo.name[2] = 'I';
+		geo->name[2] = 'I';
 	else
-		geo.name[2] = ' ';
-	geo.name[3] = '\0';
+		geo->name[2] = ' ';
+	geo->name[3] = '\0';
+
+	ieee80211_set_geo(bcm->ieee, geo);
+	kfree(geo);
 
-	ieee80211_set_geo(bcm->ieee, &geo);
+	return 0;
 }
 
 /* DummyTransmission function, as documented on 
@@ -3479,16 +3487,17 @@ static int bcm43xx_attach_board(struct bcm43xx_private *bcm)
 			goto err_80211_unwind;
 		bcm43xx_wireless_core_disable(bcm);
 	}
+	err = bcm43xx_geo_init(bcm);
+	if (err)
+		goto err_80211_unwind;
 	bcm43xx_pctl_set_crystal(bcm, 0);
 
 	/* Set the MAC address in the networking subsystem */
-	if (bcm43xx_current_phy(bcm)->type == BCM43xx_PHYTYPE_A)
+	if (is_valid_ether_addr(bcm->sprom.et1macaddr))
 		memcpy(bcm->net_dev->dev_addr, bcm->sprom.et1macaddr, 6);
 	else
 		memcpy(bcm->net_dev->dev_addr, bcm->sprom.il0macaddr, 6);
 
-	bcm43xx_geo_init(bcm);
-
 	snprintf(bcm->nick, IW_ESSID_MAX_SIZE,
 		 "Broadcom %04X", bcm->chip_id);
 

drivers/net/wireless/bcm43xx/bcm43xx_main.h

@@ -118,12 +118,14 @@ int bcm43xx_channel_to_freq(struct bcm43xx_private *bcm,
 static inline
 int bcm43xx_is_valid_channel_a(u8 channel)
 {
-	return (channel <= 200);
+	return (channel >= IEEE80211_52GHZ_MIN_CHANNEL
+	       && channel <= IEEE80211_52GHZ_MAX_CHANNEL);
 }
 static inline
 int bcm43xx_is_valid_channel_bg(u8 channel)
 {
-	return (channel >= 1 && channel <= 14);
+	return (channel >= IEEE80211_24GHZ_MIN_CHANNEL
+	       && channel <= IEEE80211_24GHZ_MAX_CHANNEL);
 }
 static inline
 int bcm43xx_is_valid_channel(struct bcm43xx_private *bcm,

drivers/net/wireless/bcm43xx/bcm43xx_phy.c

@@ -1287,7 +1287,7 @@ static void bcm43xx_phy_initg(struct bcm43xx_private *bcm)
 	if (radio->revision == 8)
 		bcm43xx_phy_write(bcm, 0x0805, 0x3230);
 	bcm43xx_phy_init_pctl(bcm);
-	if (bcm->chip_id == 0x4306 && bcm->chip_package != 2) {
+	if (bcm->chip_id == 0x4306 && bcm->chip_package == 2) {
 		bcm43xx_phy_write(bcm, 0x0429,
 				  bcm43xx_phy_read(bcm, 0x0429) & 0xBFFF);
 		bcm43xx_phy_write(bcm, 0x04C3,

drivers/net/wireless/bcm43xx/bcm43xx_wx.c

@@ -182,8 +182,11 @@ static int bcm43xx_wx_set_mode(struct net_device *net_dev,
 		mode = BCM43xx_INITIAL_IWMODE;
 
 	bcm43xx_lock_mmio(bcm, flags);
-	if (bcm->ieee->iw_mode != mode)
-		bcm43xx_set_iwmode(bcm, mode);
+	if (bcm->initialized) {
+		if (bcm->ieee->iw_mode != mode)
+			bcm43xx_set_iwmode(bcm, mode);
+	} else
+		bcm->ieee->iw_mode = mode;
 	bcm43xx_unlock_mmio(bcm, flags);
 
 	return 0;

include/linux/netdevice.h

@@ -831,21 +831,19 @@ static inline void netif_rx_schedule(struct net_device *dev)
 		__netif_rx_schedule(dev);
 }
 
-
-static inline void  __netif_rx_reschedule(struct net_device *dev, int undo)
-{
-	dev->quota += undo;
-	list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
-	__raise_softirq_irqoff(NET_RX_SOFTIRQ);
-}
-
-/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
+/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
+ * Do not inline this?
+ */
 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
 {
 	if (netif_rx_schedule_prep(dev)) {
 		unsigned long flags;
+
+		dev->quota += undo;
+
 		local_irq_save(flags);
-		__netif_rx_reschedule(dev, undo);
+		list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
+		__raise_softirq_irqoff(NET_RX_SOFTIRQ);
 		local_irq_restore(flags);
 		return 1;
 	}

include/net/ieee80211.h

@@ -955,11 +955,13 @@ enum ieee80211_state {
 
 #define IEEE80211_24GHZ_MIN_CHANNEL 1
 #define IEEE80211_24GHZ_MAX_CHANNEL 14
-#define IEEE80211_24GHZ_CHANNELS    14
+#define IEEE80211_24GHZ_CHANNELS (IEEE80211_24GHZ_MAX_CHANNEL - \
+				  IEEE80211_24GHZ_MIN_CHANNEL + 1)
 
 #define IEEE80211_52GHZ_MIN_CHANNEL 34
 #define IEEE80211_52GHZ_MAX_CHANNEL 165
-#define IEEE80211_52GHZ_CHANNELS    131
+#define IEEE80211_52GHZ_CHANNELS (IEEE80211_52GHZ_MAX_CHANNEL - \
+				  IEEE80211_52GHZ_MIN_CHANNEL + 1)
 
 enum {
 	IEEE80211_CH_PASSIVE_ONLY = (1 << 0),

include/net/ieee80211softmac.h

@@ -204,7 +204,8 @@ struct ieee80211softmac_device {
 	
 	/* couple of flags */
 	u8 scanning:1, /* protects scanning from being done multiple times at once */
-	   associated:1;
+	   associated:1,
+	   running:1;
 	
 	struct ieee80211softmac_scaninfo *scaninfo;
 	struct ieee80211softmac_assoc_info associnfo;

net/ieee80211/softmac/ieee80211softmac_assoc.c

@@ -51,11 +51,12 @@ ieee80211softmac_assoc(struct ieee80211softmac_device *mac, struct ieee80211soft
 	spin_lock_irqsave(&mac->lock, flags);
 	mac->associnfo.associating = 1;
 	mac->associated = 0; /* just to make sure */
-	spin_unlock_irqrestore(&mac->lock, flags);
 
 	/* Set a timer for timeout */
 	/* FIXME: make timeout configurable */
-	schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
+	if (likely(mac->running))
+		schedule_delayed_work(&mac->associnfo.timeout, 5 * HZ);
+	spin_unlock_irqrestore(&mac->lock, flags);
 }
 
 void
@@ -319,6 +320,9 @@ ieee80211softmac_handle_assoc_response(struct net_device * dev,
 	u16 status = le16_to_cpup(&resp->status);
 	struct ieee80211softmac_network *network = NULL;
 	unsigned long flags;
+
+	if (unlikely(!mac->running))
+		return -ENODEV;
 	
 	spin_lock_irqsave(&mac->lock, flags);
 
@@ -377,10 +381,16 @@ ieee80211softmac_handle_disassoc(struct net_device * dev,
 {
 	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 	unsigned long flags;
+
+	if (unlikely(!mac->running))
+		return -ENODEV;
+
 	if (memcmp(disassoc->header.addr2, mac->associnfo.bssid, ETH_ALEN))
 		return 0;
+
 	if (memcmp(disassoc->header.addr1, mac->dev->dev_addr, ETH_ALEN))
 		return 0;
+
 	dprintk(KERN_INFO PFX "got disassoc frame\n");
 	netif_carrier_off(dev);
 	spin_lock_irqsave(&mac->lock, flags);
@@ -400,6 +410,9 @@ ieee80211softmac_handle_reassoc_req(struct net_device * dev,
 	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 	struct ieee80211softmac_network *network;
 
+	if (unlikely(!mac->running))
+		return -ENODEV;
+
 	network = ieee80211softmac_get_network_by_bssid(mac, resp->header.addr3);
 	if (!network) {
 		dprintkl(KERN_INFO PFX "reassoc request from unknown network\n");

net/ieee80211/softmac/ieee80211softmac_auth.c

@@ -86,6 +86,11 @@ ieee80211softmac_auth_queue(void *data)
 		
 		/* Lock and set flags */
 		spin_lock_irqsave(&mac->lock, flags);
+		if (unlikely(!mac->running)) {
+			/* Prevent reschedule on workqueue flush */
+			spin_unlock_irqrestore(&mac->lock, flags);
+			return;
+		}
 		net->authenticated = 0;
 		net->authenticating = 1;
 		/* add a timeout call so we eventually give up waiting for an auth reply */
@@ -124,6 +129,9 @@ ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth)
 	unsigned long flags;
 	u8 * data;
 	
+	if (unlikely(!mac->running))
+		return -ENODEV;
+
 	/* Find correct auth queue item */
 	spin_lock_irqsave(&mac->lock, flags);
 	list_for_each(list_ptr, &mac->auth_queue) {
@@ -298,8 +306,6 @@ ieee80211softmac_deauth_from_net(struct ieee80211softmac_device *mac,
 	
 	/* can't transmit data right now... */
 	netif_carrier_off(mac->dev);
-	/* let's try to re-associate */
-	schedule_work(&mac->associnfo.work);
 	spin_unlock_irqrestore(&mac->lock, flags);
 }
 
@@ -338,6 +344,9 @@ ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *de
 	struct ieee80211softmac_network *net = NULL;
 	struct ieee80211softmac_device *mac = ieee80211_priv(dev);
 	
+	if (unlikely(!mac->running))
+		return -ENODEV;
+
 	if (!deauth) {
 		dprintk("deauth without deauth packet. eek!\n");
 		return 0;
@@ -360,5 +369,8 @@ ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *de
 	}
 
 	ieee80211softmac_deauth_from_net(mac, net);
+
+	/* let's try to re-associate */
+	schedule_work(&mac->associnfo.work);
 	return 0;
 }

net/ieee80211/softmac/ieee80211softmac_module.c

@@ -89,6 +89,8 @@ ieee80211softmac_clear_pending_work(struct ieee80211softmac_device *sm)
 	ieee80211softmac_wait_for_scan(sm);
 	
 	spin_lock_irqsave(&sm->lock, flags);
+	sm->running = 0;
+
 	/* Free all pending assoc work items */
 	cancel_delayed_work(&sm->associnfo.work);
 	
@@ -204,6 +206,8 @@ void ieee80211softmac_start(struct net_device *dev)
 		assert(0);
 	if (mac->txrates_change)
 		mac->txrates_change(dev, change, &oldrates);
+
+	mac->running = 1;
 }
 EXPORT_SYMBOL_GPL(ieee80211softmac_start);
 

net/ieee80211/softmac/ieee80211softmac_scan.c

@@ -115,7 +115,15 @@ void ieee80211softmac_scan(void *d)
 			// TODO: is this if correct, or should we do this only if scanning from assoc request?
 			if (sm->associnfo.req_essid.len)
 				ieee80211softmac_send_mgt_frame(sm, &sm->associnfo.req_essid, IEEE80211_STYPE_PROBE_REQ, 0);
+
+			spin_lock_irqsave(&sm->lock, flags);
+			if (unlikely(!sm->running)) {
+				/* Prevent reschedule on workqueue flush */
+				spin_unlock_irqrestore(&sm->lock, flags);
+				break;
+			}
 			schedule_delayed_work(&si->softmac_scan, IEEE80211SOFTMAC_PROBE_DELAY);
+			spin_unlock_irqrestore(&sm->lock, flags);
 			return;
 		} else {
 			dprintk(PFX "Not probing Channel %d (not allowed here)\n", si->channels[current_channel_idx].channel);