v2.4.12.4 -> v2.4.12.5

  - Greg KH: usbnet fix
  - Johannes Erdfelt: uhci.c bulk queueing fixes

Makefile

 VERSION = 2
 PATCHLEVEL = 4
 SUBLEVEL = 13
-EXTRAVERSION =-pre4
+EXTRAVERSION =-pre5
 
 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 

drivers/char/joystick/analog.c

@@ -138,7 +138,7 @@ struct analog_port {
 
 #ifdef __i386__
 #define TSC_PRESENT	(test_bit(X86_FEATURE_TSC, &boot_cpu_data.x86_capability))
-#define GET_TIME(x)	do { if (TSC_PRESENT) rdtscl(x); else outb(0, 0x43); x = inb(0x40); x |= inb(0x40) << 8; } while (0)
+#define GET_TIME(x)	do { if (TSC_PRESENT) rdtscl(x); else { outb(0, 0x43); x = inb(0x40); x |= inb(0x40) << 8; } } while (0)
 #define DELTA(x,y)	(TSC_PRESENT?((y)-(x)):((x)-(y)+((x)<(y)?1193180L/HZ:0)))
 #define TIME_NAME	(TSC_PRESENT?"TSC":"PIT")
 #elif __x86_64__
@@ -499,7 +499,9 @@ static void analog_init_device(struct analog_port *port, struct analog *analog,
 	else
 		printk(" [%s timer, %d %sHz clock, %d ns res]\n", TIME_NAME,
 		port->speed > 10000 ? (port->speed + 800) / 1000 : port->speed,
-		port->speed > 10000 ? "M" : "k", (port->loop * 1000000) / port->speed);
+		port->speed > 10000 ? "M" : "k",
+		port->speed > 10000 ? (port->loop * 1000) / (port->speed / 1000)
+				    : (port->loop * 1000000) / port->speed);
 }
 
 /*

drivers/usb/uhci.h

@@ -345,6 +345,7 @@ struct urb_priv {
 	int status;			/* Final status */
 
 	unsigned long inserttime;	/* In jiffies */
+	unsigned long fsbrtime;	/* In jiffies */
 
 	struct list_head queue_list;
 	struct list_head complete_list;

drivers/usb/usbnet.c

@@ -15,7 +15,7 @@
  * support as appropriate.  Devices currently supported include:
  *
  *	- AnchorChip 2720
- *	- Belkin F5U104 (custom)
+ *	- Belkin, eTEK (interops with Win32 drivers)
  *	- "Linux Devices" (like iPaq and similar SA-1100 based PDAs)
  *	- NetChip 1080 (interoperates with NetChip Win32 drivers)
  *	- Prolific PL-2301/2302 (replaces "plusb" driver)
@@ -73,6 +73,9 @@
  *		Win32 Belkin driver; other cleanups (db).
  * 16-jul-2001	Bugfixes for uhci oops-on-unplug, Belkin support, various
  *		cleanups for problems not yet seen in the field. (db)
+ * 17-oct-2001	Handle "Advance USBNET" product, like Belkin/eTEK devices,
+ *		from Ioannis Mavroukakis <i.mavroukakis@btinternet.com>;
+ *		rx unlinks somehow weren't async; minor cleanup.
  *
  *-------------------------------------------------------------------------*/
 
@@ -97,7 +100,7 @@
 
 
 #define	CONFIG_USB_AN2720
-#define	CONFIG_USB_BELKIN_F5U104
+#define	CONFIG_USB_BELKIN
 #define	CONFIG_USB_LINUXDEV
 #define	CONFIG_USB_NET1080
 #define	CONFIG_USB_PL2301
@@ -119,7 +122,7 @@
 #endif
 
 // packets are always ethernet inside
-// ... except they can be bigger (up to 64K with this framing)
+// ... except they can be bigger (limit of 64K with NetChip framing)
 #define MIN_PACKET	sizeof(struct ethhdr)
 #define MAX_PACKET	32768
 
@@ -169,7 +172,8 @@ struct driver_info {
 	char		*description;
 
 	int		flags;
-#define FLAG_FRAMING	0x0001		/* guard against device dropouts */ 
+#define FLAG_FRAMING_NC	0x0001		/* guard against device dropouts */ 
+#define FLAG_NO_SETINT	0x0010		/* device can't set_interface() */
 
 	/* reset device ... can sleep */
 	int	(*reset)(struct usbnet *);
@@ -251,7 +255,7 @@ struct nc_trailer {
 	u16	packet_id;
 } __attribute__((__packed__));
 
-// packets may use FLAG_FRAMING and optional pad
+// packets may use FLAG_FRAMING_NC and optional pad
 #define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \
 				+ sizeof (struct ethhdr) \
 				+ (mtu) \
@@ -288,22 +292,24 @@ static const struct driver_info	an2720_info = {
 
 
 
-#ifdef	CONFIG_USB_BELKIN_F5U104
+#ifdef	CONFIG_USB_BELKIN
 
 /*-------------------------------------------------------------------------
  *
  * Belkin F5U104 ... two NetChip 2280 devices + Atmel microcontroller
  *
+ * ... also two eTEK designs, including one sold as "Advance USBNET"
+ *
  *-------------------------------------------------------------------------*/
 
 static const struct driver_info	belkin_info = {
-	description:	"Belkin USB Direct Connect (F5U104)",
+	description:	"Belkin, eTEK, or compatible",
 
 	in: 1, out: 1,		// direction distinguishes these
 	epsize:	64,
 };
 
-#endif	/* CONFIG_USB_BELKIN_F5U104 */
+#endif	/* CONFIG_USB_BELKIN */
 
 
 
@@ -632,7 +638,7 @@ static int net1080_check_connect (struct usbnet *dev)
 
 static const struct driver_info	net1080_info = {
 	description:	"NetChip TurboCONNECT",
-	flags:		FLAG_FRAMING,
+	flags:		FLAG_FRAMING_NC,
 	reset:		net1080_reset,
 	check_connect:	net1080_check_connect,
 
@@ -729,9 +735,9 @@ static int usbnet_change_mtu (struct net_device *net, int new_mtu)
 {
 	struct usbnet	*dev = (struct usbnet *) net->priv;
 
-	if (new_mtu <= sizeof (struct ethhdr) || new_mtu > MAX_PACKET)
+	if (new_mtu <= MIN_PACKET || new_mtu > MAX_PACKET)
 		return -EINVAL;
-	if (((dev->driver_info->flags) & FLAG_FRAMING)) {
+	if (((dev->driver_info->flags) & FLAG_FRAMING_NC)) {
 		if (FRAMED_SIZE (new_mtu) > MAX_PACKET)
 			return -EINVAL;
 	// no second zero-length packet read wanted after mtu-sized packets
@@ -779,9 +785,11 @@ static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
 	unsigned long		lockflags;
 	size_t			size;
 
-	size = (dev->driver_info->flags & FLAG_FRAMING)
-			? FRAMED_SIZE (dev->net.mtu)
-			: (sizeof (struct ethhdr) + dev->net.mtu);
+	if (dev->driver_info->flags & FLAG_FRAMING_NC)
+		size = FRAMED_SIZE (dev->net.mtu);
+	else
+		size = (sizeof (struct ethhdr) + dev->net.mtu);
+
 	if ((skb = alloc_skb (size, flags)) == 0) {
 		dbg ("no rx skb");
 		tasklet_schedule (&dev->bh);
@@ -798,9 +806,15 @@ static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
 	FILL_BULK_URB (urb, dev->udev,
 		usb_rcvbulkpipe (dev->udev, dev->driver_info->in),
 		skb->data, size, rx_complete, skb);
+	urb->transfer_flags |= USB_ASYNC_UNLINK;
 #ifdef	REALLY_QUEUE
 	urb->transfer_flags |= USB_QUEUE_BULK;
 #endif
+#if 0
+	// Idle-but-posted reads with UHCI really chew up
+	// PCI bandwidth unless FSBR is disabled
+	urb->transfer_flags |= USB_NO_FSBR;
+#endif
 
 	spin_lock_irqsave (&dev->rxq.lock, lockflags);
 
@@ -827,7 +841,7 @@ static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
 
 static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
 {
-	if (dev->driver_info->flags & FLAG_FRAMING) {
+	if (dev->driver_info->flags & FLAG_FRAMING_NC) {
 		struct nc_header	*header;
 		struct nc_trailer	*trailer;
 
@@ -1083,9 +1097,11 @@ static int usbnet_open (struct net_device *net)
 	}
 
 	netif_start_queue (net);
-	devdbg (dev, "open: enable queueing (rx %d, tx %d) mtu %d %sframed",
+	devdbg (dev, "open: enable queueing (rx %d, tx %d) mtu %d %s framing",
 		RX_QLEN, TX_QLEN, dev->net.mtu,
-		(info->flags & FLAG_FRAMING) ? "" : "un"
+		(info->flags & FLAG_FRAMING_NC)
+		    ? "NetChip"
+		    : "raw"
 		);
 
 	// delay posting reads until we're fully open
@@ -1194,7 +1210,7 @@ static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
 
 	flags = in_interrupt () ? GFP_ATOMIC : GFP_KERNEL;
 
-	if (info->flags & FLAG_FRAMING) {
+	if (info->flags & FLAG_FRAMING_NC) {
 		struct sk_buff	*skb2;
 		skb2 = fixup_skb (skb, flags);
 		if (!skb2) {
@@ -1215,7 +1231,7 @@ static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
 	entry->state = tx_start;
 	entry->length = length;
 
-	if (info->flags & FLAG_FRAMING) {
+	if (info->flags & FLAG_FRAMING_NC) {
 		header = (struct nc_header *) skb_push (skb, sizeof *header);
 		header->hdr_len = cpu_to_le16 (sizeof (*header));
 		header->packet_len = cpu_to_le16 (length);
@@ -1223,6 +1239,8 @@ static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
 			*skb_put (skb, 1) = PAD_BYTE;
 		trailer = (struct nc_trailer *) skb_put (skb, sizeof *trailer);
 	} else if ((length % EP_SIZE (dev)) == 0) {
+		// not all hardware behaves with USB_ZERO_PACKET,
+		// so we add an extra one-byte packet
 		if (skb_shared (skb)) {
 			struct sk_buff *skb2;
 			skb2 = skb_unshare (skb, flags);
@@ -1238,16 +1256,14 @@ static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
 	FILL_BULK_URB (urb, dev->udev,
 			usb_sndbulkpipe (dev->udev, info->out),
 			skb->data, skb->len, tx_complete, skb);
-	// Idle-but-posted reads with UHCI really chew up
-	// PCI bandwidth unless FSBR is disabled
-	urb->transfer_flags |= USB_ASYNC_UNLINK | USB_NO_FSBR;
+	urb->transfer_flags |= USB_ASYNC_UNLINK;
 #ifdef	REALLY_QUEUE
 	urb->transfer_flags |= USB_QUEUE_BULK;
 #endif
 	// FIXME urb->timeout = ... jiffies ... ;
 
 	spin_lock_irqsave (&dev->txq.lock, flags);
-	if (info->flags & FLAG_FRAMING) {
+	if (info->flags & FLAG_FRAMING_NC) {
 		header->packet_id = cpu_to_le16 (dev->packet_id++);
 		put_unaligned (header->packet_id, &trailer->packet_id);
 #if 0
@@ -1408,10 +1424,13 @@ usbnet_probe (struct usb_device *udev, unsigned ifnum,
 		return 0;
 	}
 
+	// more sanity (unless the device is broken)
+	if (!(info->flags & FLAG_NO_SETINT)) {
 		if (usb_set_interface (udev, ifnum, altnum) < 0) {
 			err ("set_interface failed");
 			return 0;
 		}
+	}
 
 	// set up our own records
 	if (!(dev = kmalloc (sizeof *dev, GFP_KERNEL))) {
@@ -1484,6 +1503,18 @@ static const struct usb_device_id	products [] = {
 },
 #endif
 
+#ifdef	CONFIG_USB_BELKIN
+{
+	USB_DEVICE (0x050d, 0x0004),	// Belkin
+	driver_info:	(unsigned long) &belkin_info,
+}, {
+	USB_DEVICE (0x056c, 0x8100),	// eTEK
+	driver_info:	(unsigned long) &belkin_info,
+}, {
+	USB_DEVICE (0x0525, 0x9901),	// Advance USBNET (eTEK)
+	driver_info:	(unsigned long) &belkin_info,
+},
+#endif
 
 // GeneSys GL620USB (www.genesyslogic.com.tw)
 // (patch exists against an older driver version)
@@ -1508,16 +1539,6 @@ static const struct usb_device_id	products [] = {
 },
 #endif
 
-#ifdef	CONFIG_USB_BELKIN_F5U104
-{
-	USB_DEVICE (0x050d, 0x0004),	// Belkin
-	driver_info:	(unsigned long) &belkin_info,
-}, {
-	USB_DEVICE (0x056c, 0x8100),	// eTEK
-	driver_info:	(unsigned long) &belkin_info,
-},
-#endif
-
 #ifdef CONFIG_USB_PL2301
 {
 	USB_DEVICE (0x067b, 0x0000),	// PL-2301
@@ -1563,6 +1584,7 @@ static void __exit usbnet_exit (void)
 }
 module_exit (usbnet_exit);
 
+EXPORT_NO_SYMBOLS;
 MODULE_AUTHOR ("David Brownell <dbrownell@users.sourceforge.net>");
-MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (Belkin, Linux, NetChip, Prolific, ...)");
-MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (numerous vendors)");
+MODULE_LICENSE ("GPL");

fs/buffer.c

@@ -1131,31 +1131,13 @@ void __brelse(struct buffer_head * buf)
 }
 
 /*
- * bforget() is like brelse(), except it might discard any
+ * bforget() is like brelse(), except it discards any
  * potentially dirty data.
  */
 void __bforget(struct buffer_head * buf)
 {
-	/* grab the lru lock here so that "b_count" is stable */
-	spin_lock(&lru_list_lock);
-	write_lock(&hash_table_lock);
-	if (!atomic_dec_and_test(&buf->b_count) || buffer_locked(buf))
-		goto in_use;
-
-	/* Mark it clean */
-	clear_bit(BH_Dirty, &buf->b_state);
-	write_unlock(&hash_table_lock);
-
-	/* After which we can remove it from all queues */
-	remove_inode_queue(buf);
-	__remove_from_lru_list(buf);
-	buf->b_list = BUF_CLEAN;
-	spin_unlock(&lru_list_lock);
-	return;
-
-in_use:
-	write_unlock(&hash_table_lock);
-	spin_unlock(&lru_list_lock);
+	mark_buffer_clean(buf);
+	__brelse(buf);
 }
 
 /**

mm/page_alloc.c

@@ -394,7 +394,7 @@ struct page * __alloc_pages(unsigned int gfp_mask, unsigned int order, zonelist_
 	}
 
 	/* Don't let big-order allocations loop */
-	if (order)
+	if (order > 1)
 		return NULL;
 
 	/* Yield for kswapd, and try again */

mm/vmscan.c

@@ -346,11 +346,7 @@ static int shrink_cache(int nr_pages, int max_scan, unsigned int gfp_mask)
 
 		page = list_entry(entry, struct page, lru);
 
-		if (unlikely(!PageInactive(page) && !PageActive(page)))
-			BUG();
-
-		/* Mapping-less page on LRU-list? */
-		if (unlikely(!page->mapping))
+		if (unlikely(!PageInactive(page)))
 			BUG();
 
 		list_del(entry);
@@ -363,31 +359,17 @@ static int shrink_cache(int nr_pages, int max_scan, unsigned int gfp_mask)
 			continue;
 
 		/* Racy check to avoid trylocking when not worthwhile */
-		if (!is_page_cache_freeable(page))
-			continue;
-
-		if (unlikely(TryLockPage(page))) {
-			if (gfp_mask & __GFP_FS) {
-				page_cache_get(page);
-				spin_unlock(&pagemap_lru_lock);
-				wait_on_page(page);
-				page_cache_release(page);
-				spin_lock(&pagemap_lru_lock);
-			}
+		if (!page->buffers && page_count(page) != 1)
 			continue;
-		}
 
 		/*
-		 * Still strictly racy - we don't own the pagecache lock,
-		 * so somebody might look up the page while we do this.
-		 * It's just a heuristic, though.
+		 * The page is locked. IO in progress?
+		 * Move it to the back of the list.
 		 */
-		if (!is_page_cache_freeable(page)) {
-			UnlockPage(page);
+		if (unlikely(TryLockPage(page)))
 			continue;
-		}
 
-		if (PageDirty(page)) {
+		if (PageDirty(page) && is_page_cache_freeable(page) && page->mapping) {
 			/*
 			 * It is not critical here to write it only if
 			 * the page is unmapped beause any direct writer
@@ -461,6 +443,9 @@ static int shrink_cache(int nr_pages, int max_scan, unsigned int gfp_mask)
 			}
 		}
 
+		if (unlikely(!page->mapping))
+			BUG();
+
 		if (unlikely(!spin_trylock(&pagecache_lock))) {
 			/* we hold the page lock so the page cannot go away from under us */
 			spin_unlock(&pagemap_lru_lock);