Merge intel.com:/home/lenb/bk/linux-2.6.0

into intel.com:/home/lenb/src/linux-acpi-test-2.6.0

Makefile

 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 0
-EXTRAVERSION = -test11
+EXTRAVERSION =
 
 # *DOCUMENTATION*
 # To see a list of typical targets execute "make help"

drivers/block/scsi_ioctl.c

@@ -216,12 +216,7 @@ static int sg_io(request_queue_t *q, struct block_device *bdev,
 	 * fill in request structure
 	 */
 	rq->cmd_len = hdr->cmd_len;
-
-	if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len)) {
-		blk_put_request(rq);
-		return -EFAULT;
-	}
-
+	memcpy(rq->cmd, hdr->cmdp, hdr->cmd_len);
 	if (sizeof(rq->cmd) != hdr->cmd_len)
 		memset(rq->cmd + hdr->cmd_len, 0, sizeof(rq->cmd) - hdr->cmd_len);
 
@@ -437,12 +432,23 @@ int scsi_cmd_ioctl(struct block_device *bdev, unsigned int cmd, unsigned long ar
 			break;
 		case SG_IO: {
 			struct sg_io_hdr hdr;
+			unsigned char cdb[BLK_MAX_CDB], *old_cdb;
 
-			if (copy_from_user(&hdr, (struct sg_io_hdr *) arg, sizeof(hdr))) {
-				err = -EFAULT;
+			err = -EFAULT;
+			if (copy_from_user(&hdr, (struct sg_io_hdr *) arg, sizeof(hdr)))
 				break;
-			}
+			err = -EINVAL;
+			if (hdr.cmd_len > sizeof(rq->cmd))
+				break;
+			err = -EFAULT;
+			if (copy_from_user(cdb, hdr.cmdp, hdr.cmd_len))
+				break;
+
+			old_cdb = hdr.cmdp;
+			hdr.cmdp = cdb;
 			err = sg_io(q, bdev, &hdr);
+
+			hdr.cmdp = old_cdb;
 			if (copy_to_user((struct sg_io_hdr *) arg, &hdr, sizeof(hdr)))
 				err = -EFAULT;
 			break;

drivers/ide/ide-cd.c

@@ -799,6 +799,10 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 			 * sector...  If we got here the error is not correctable */
 			ide_dump_status (drive, "media error (bad sector)", stat);
 			do_end_request = 1;
+		} else if (sense_key == BLANK_CHECK) {
+			/* Disk appears blank ?? */
+			ide_dump_status (drive, "media error (blank)", stat);
+			do_end_request = 1;
 		} else if ((err & ~ABRT_ERR) != 0) {
 			/* Go to the default handler
 			   for other errors. */

drivers/ide/ide-cd.h

@@ -501,6 +501,7 @@ struct cdrom_info {
 #define ILLEGAL_REQUEST         0x05
 #define UNIT_ATTENTION          0x06
 #define DATA_PROTECT            0x07
+#define BLANK_CHECK             0x08
 #define ABORTED_COMMAND         0x0b
 #define MISCOMPARE              0x0e
 
@@ -578,7 +579,7 @@ const char * const sense_key_texts[16] = {
 	"Illegal request",
 	"Unit attention",
 	"Data protect",
-	"(reserved)",
+	"Blank check",
 	"(reserved)",
 	"(reserved)",
 	"Aborted command",

drivers/md/raid5.c

@@ -40,6 +40,16 @@
 
 #define stripe_hash(conf, sect)	((conf)->stripe_hashtbl[((sect) >> STRIPE_SHIFT) & HASH_MASK])
 
+/* bio's attached to a stripe+device for I/O are linked together in bi_sector
+ * order without overlap.  There may be several bio's per stripe+device, and
+ * a bio could span several devices.
+ * When walking this list for a particular stripe+device, we must never proceed
+ * beyond a bio that extends past this device, as the next bio might no longer
+ * be valid.
+ * This macro is used to determine the 'next' bio in the list, given the sector
+ * of the current stripe+device
+ */
+#define r5_next_bio(bio, sect) ( ( bio->bi_sector + (bio->bi_size>>9) < sect + STRIPE_SECTORS) ? bio->bi_next : NULL)
 /*
  * The following can be used to debug the driver
  */
@@ -613,7 +623,7 @@ static void copy_data(int frombio, struct bio *bio,
 	int i;
 
 	for (;bio && bio->bi_sector < sector+STRIPE_SECTORS;
-		bio = bio->bi_next) {
+	      bio = r5_next_bio(bio, sector) ) {
 		int page_offset;
 		if (bio->bi_sector >= sector)
 			page_offset = (signed)(bio->bi_sector - sector) * 512;
@@ -738,7 +748,11 @@ static void compute_parity(struct stripe_head *sh, int method)
 	for (i = disks; i--;)
 		if (sh->dev[i].written) {
 			sector_t sector = sh->dev[i].sector;
-			copy_data(1, sh->dev[i].written, sh->dev[i].page, sector);
+			struct bio *wbi = sh->dev[i].written;
+			while (wbi && wbi->bi_sector < sector + STRIPE_SECTORS) {
+				copy_data(1, wbi, sh->dev[i].page, sector);
+				wbi = r5_next_bio(wbi, sector);
+			}
 
 			set_bit(R5_LOCKED, &sh->dev[i].flags);
 			set_bit(R5_UPTODATE, &sh->dev[i].flags);
@@ -791,8 +805,10 @@ static void add_stripe_bio (struct stripe_head *sh, struct bio *bi, int dd_idx,
 		bip = &sh->dev[dd_idx].towrite;
 	else
 		bip = &sh->dev[dd_idx].toread;
-	while (*bip && (*bip)->bi_sector < bi->bi_sector)
+	while (*bip && (*bip)->bi_sector < bi->bi_sector) {
+		BUG_ON((*bip)->bi_sector + ((*bip)->bi_size >> 9) > bi->bi_sector);
 		bip = & (*bip)->bi_next;
+	}
 /* FIXME do I need to worry about overlapping bion */
 	if (*bip && bi->bi_next && (*bip) != bi->bi_next)
 		BUG();
@@ -813,7 +829,7 @@ static void add_stripe_bio (struct stripe_head *sh, struct bio *bi, int dd_idx,
 		for (bi=sh->dev[dd_idx].towrite;
 		     sector < sh->dev[dd_idx].sector + STRIPE_SECTORS &&
 			     bi && bi->bi_sector <= sector;
-		     bi = bi->bi_next) {
+		     bi = r5_next_bio(bi, sh->dev[dd_idx].sector)) {
 			if (bi->bi_sector + (bi->bi_size>>9) >= sector)
 				sector = bi->bi_sector + (bi->bi_size>>9);
 		}
@@ -883,7 +899,7 @@ static void handle_stripe(struct stripe_head *sh)
 			spin_unlock_irq(&conf->device_lock);
 			while (rbi && rbi->bi_sector < dev->sector + STRIPE_SECTORS) {
 				copy_data(0, rbi, dev->page, dev->sector);
-				rbi2 = rbi->bi_next;
+				rbi2 = r5_next_bio(rbi, dev->sector);
 				spin_lock_irq(&conf->device_lock);
 				if (--rbi->bi_phys_segments == 0) {
 					rbi->bi_next = return_bi;
@@ -928,7 +944,7 @@ static void handle_stripe(struct stripe_head *sh)
 			if (bi) to_write--;
 
 			while (bi && bi->bi_sector < sh->dev[i].sector + STRIPE_SECTORS){
-				struct bio *nextbi = bi->bi_next;
+				struct bio *nextbi = r5_next_bio(bi, sh->dev[i].sector);
 				clear_bit(BIO_UPTODATE, &bi->bi_flags);
 				if (--bi->bi_phys_segments == 0) {
 					md_write_end(conf->mddev);
@@ -941,7 +957,7 @@ static void handle_stripe(struct stripe_head *sh)
 			bi = sh->dev[i].written;
 			sh->dev[i].written = NULL;
 			while (bi && bi->bi_sector < sh->dev[i].sector + STRIPE_SECTORS) {
-				struct bio *bi2 = bi->bi_next;
+				struct bio *bi2 = r5_next_bio(bi, sh->dev[i].sector);
 				clear_bit(BIO_UPTODATE, &bi->bi_flags);
 				if (--bi->bi_phys_segments == 0) {
 					md_write_end(conf->mddev);
@@ -957,7 +973,7 @@ static void handle_stripe(struct stripe_head *sh)
 				sh->dev[i].toread = NULL;
 				if (bi) to_read--;
 				while (bi && bi->bi_sector < sh->dev[i].sector + STRIPE_SECTORS){
-					struct bio *nextbi = bi->bi_next;
+					struct bio *nextbi = r5_next_bio(bi, sh->dev[i].sector);
 					clear_bit(BIO_UPTODATE, &bi->bi_flags);
 					if (--bi->bi_phys_segments == 0) {
 						bi->bi_next = return_bi;
@@ -1000,7 +1016,7 @@ static void handle_stripe(struct stripe_head *sh)
 			    wbi = dev->written;
 			    dev->written = NULL;
 			    while (wbi && wbi->bi_sector < dev->sector + STRIPE_SECTORS) {
-				    wbi2 = wbi->bi_next;
+				    wbi2 = r5_next_bio(wbi, dev->sector);
 				    if (--wbi->bi_phys_segments == 0) {
 					    md_write_end(conf->mddev);
 					    wbi->bi_next = return_bi;

drivers/scsi/qla1280.c

@@ -16,9 +16,13 @@
 * General Public License for more details.
 *
 ******************************************************************************/
-#define QLA1280_VERSION      "3.23.37"
+#define QLA1280_VERSION      "3.23.37.1"
 /*****************************************************************************
     Revision History:
+    Rev  3.23.37.1 December 17, 2003, Jes Sorensen
+	- Delete completion queue from srb if mailbox command failed to
+	  to avoid qla1280_done completeting qla1280_error_action's
+	  obsolete context
     Rev  3.23.37 October 1, 2003, Jes Sorensen
 	- Make MMIO depend on CONFIG_X86_VISWS instead of yet another
 	  random CONFIG option
@@ -1464,8 +1468,15 @@ qla1280_error_action(Scsi_Cmnd * cmd, enum action action)
 	/* If we didn't manage to issue the action, or we have no
 	 * command to wait for, exit here */
 	if (result == FAILED || handle == NULL ||
-	    handle == (unsigned char *)INVALID_HANDLE)
+	    handle == (unsigned char *)INVALID_HANDLE) {
+		/*
+		 * Clear completion queue to avoid qla1280_done() trying
+		 * to complete the command at a later stage after we
+		 * have exited the current context
+		 */
+		sp->wait = NULL;
 		goto leave;
+	}
 
 	/* set up a timer just in case we're really jammed */
 	init_timer(&timer);

drivers/usb/core/devio.c

@@ -261,7 +261,6 @@ static void async_completed(struct urb *urb, struct pt_regs *regs)
         spin_lock(&ps->lock);
         list_move_tail(&as->asynclist, &ps->async_completed);
         spin_unlock(&ps->lock);
-        wake_up(&ps->wait);
 	if (as->signr) {
 		sinfo.si_signo = as->signr;
 		sinfo.si_errno = as->urb->status;
@@ -269,6 +268,7 @@ static void async_completed(struct urb *urb, struct pt_regs *regs)
 		sinfo.si_addr = (void *)as->userurb;
 		send_sig_info(as->signr, &sinfo, as->task);
 	}
+        wake_up(&ps->wait);
 }
 
 static void destroy_async (struct dev_state *ps, struct list_head *list)

drivers/usb/core/hub.c

@@ -692,6 +692,9 @@ static int hub_port_status(struct usb_device *dev, int port,
 	struct usb_hub *hub = usb_get_intfdata(dev->actconfig->interface[0]);
 	int ret;
 
+	if (!hub)
+		return -ENODEV;
+
 	ret = get_port_status(dev, port + 1, &hub->status->port);
 	if (ret < 0)
 		dev_err (hubdev (dev),
@@ -926,7 +929,6 @@ static void hub_port_connect_change(struct usb_hub *hubstate, int port,
 			break;
 		}
 
-		hub->children[port] = dev;
 		dev->state = USB_STATE_POWERED;
 
 		/* Reset the device, and detect its speed */
@@ -979,8 +981,10 @@ static void hub_port_connect_change(struct usb_hub *hubstate, int port,
 		dev->dev.parent = dev->parent->dev.parent->parent;
 
 		/* Run it through the hoops (find a driver, etc) */
-		if (!usb_new_device(dev, &hub->dev))
+		if (!usb_new_device(dev, &hub->dev)) {
+			hub->children[port] = dev;
 			goto done;
+		}
 
 		/* Free the configuration if there was an error */
 		usb_put_dev(dev);
@@ -989,7 +993,6 @@ static void hub_port_connect_change(struct usb_hub *hubstate, int port,
 		delay = HUB_LONG_RESET_TIME;
 	}
 
-	hub->children[port] = NULL;
 	hub_port_disable(hub, port);
 done:
 	up(&usb_address0_sem);
@@ -1342,6 +1345,7 @@ int usb_physical_reset_device(struct usb_device *dev)
 			dev->devpath, ret);
 		return ret;
 	}
+	dev->state = USB_STATE_CONFIGURED;
 
 	for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
 		struct usb_interface *intf = dev->actconfig->interface[i];

drivers/usb/core/usb.c

@@ -1120,6 +1120,7 @@ int usb_new_device(struct usb_device *dev, struct device *parent)
 	if (err) {
 		dev_err(&dev->dev, "can't set config #%d, error %d\n",
 			dev->config[0].desc.bConfigurationValue, err);
+		device_del(&dev->dev);
 		goto fail;
 	}
 

drivers/usb/image/Kconfig

@@ -18,13 +18,15 @@ config USB_MDC800
 	  module will be called mdc800.
 
 config USB_SCANNER
-	tristate "USB Scanner support"
+	tristate "USB Scanner support (OBSOLETE)"
 	depends on USB
 	help
 	  Say Y here if you want to connect a USB scanner to your computer's
 	  USB port. Please read <file:Documentation/usb/scanner.txt> for more
 	  information.
 
+	  This driver has been obsoleted by support via libusb.
+
 	  To compile this driver as a module, choose M here: the
 	  module will be called scanner.
 

drivers/usb/misc/auerswald.c

@@ -324,7 +324,7 @@ static void auerchain_complete (struct urb * urb, struct pt_regs *regs)
                 urb    = acep->urbp;
                 dbg ("auerchain_complete: submitting next urb from chain");
 		urb->status = 0;	/* needed! */
-		result = usb_submit_urb(urb, GFP_KERNEL);
+		result = usb_submit_urb(urb, GFP_ATOMIC);
 
                 /* check for submit errors */
                 if (result) {
@@ -402,7 +402,7 @@ static int auerchain_submit_urb_list (pauerchain_t acp, struct urb * urb, int ea
         if (acep) {
                 dbg("submitting urb immediate");
 		urb->status = 0;	/* needed! */
-                result = usb_submit_urb(urb, GFP_KERNEL);
+                result = usb_submit_urb(urb, GFP_ATOMIC);
                 /* check for submit errors */
                 if (result) {
                         urb->status = result;

drivers/usb/serial/usb-serial.c

@@ -493,12 +493,15 @@ static int serial_open (struct tty_struct *tty, struct file * filp)
 	return retval;
 }
 
-static void __serial_close(struct usb_serial_port *port, struct file *filp)
+static void serial_close(struct tty_struct *tty, struct file * filp)
 {
-	if (!port->open_count) {
-		dbg ("%s - port not opened", __FUNCTION__);
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
 		return;
-	}
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
 
 	--port->open_count;
 	if (port->open_count <= 0) {
@@ -506,30 +509,18 @@ static void __serial_close(struct usb_serial_port *port, struct file *filp)
 		 * port is being closed by the last owner */
 		port->serial->type->close(port, filp);
 		port->open_count = 0;
+
+		if (port->tty) {
+			if (port->tty->driver_data)
+				port->tty->driver_data = NULL;
+			port->tty = NULL;
+		}
 	}
 
 	module_put(port->serial->type->owner);
 	kobject_put(&port->serial->kobj);
 }
 
-static void serial_close(struct tty_struct *tty, struct file * filp)
-{
-	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
-	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
-
-	if (!serial)
-		return;
-
-	dbg("%s - port %d", __FUNCTION__, port->number);
-
-	/* if disconnect beat us to the punch here, there's nothing to do */
-	if (tty && tty->driver_data) {
-		__serial_close(port, filp);
-		tty->driver_data = NULL;
-	}
-	port->tty = NULL;
-}
-
 static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
 {
 	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
@@ -848,19 +839,6 @@ static void destroy_serial (struct kobject *kobj)
 	dbg ("%s - %s", __FUNCTION__, kobj->name);
 
 	serial = to_usb_serial(kobj);
-
-	/* fail all future close/read/write/ioctl/etc calls */
-	for (i = 0; i < serial->num_ports; ++i) {
-		port = serial->port[i];
-		if (port->tty != NULL) {
-			port->tty->driver_data = NULL;
-			while (port->open_count > 0) {
-				__serial_close(port, NULL);
-			}
-			port->tty = NULL;
-		}
-	}
-
 	serial_shutdown (serial);
 
 	/* return the minor range that this device had */
@@ -1242,7 +1220,7 @@ int usb_serial_probe(struct usb_interface *interface,
 	/* register all of the individual ports with the driver core */
 	for (i = 0; i < num_ports; ++i) {
 		port = serial->port[i];
-		port->dev.parent = &serial->dev->dev;
+		port->dev.parent = &interface->dev;
 		port->dev.driver = NULL;
 		port->dev.bus = &usb_serial_bus_type;
 		port->dev.release = &port_release;

drivers/usb/storage/datafab.c

@@ -387,7 +387,7 @@ static int datafab_id_device(struct us_data *us,
 
 	// we'll go ahead and extract the media capacity while we're here...
 	//
-	rc = datafab_bulk_read(us, reply, sizeof(reply));
+	rc = datafab_bulk_read(us, reply, 512);
 	if (rc == USB_STOR_XFER_GOOD) {
 		// capacity is at word offset 57-58
 		//

drivers/usb/storage/jumpshot.c

@@ -317,7 +317,7 @@ static int jumpshot_id_device(struct us_data *us,
 	}
 
 	// read the reply
-	rc = jumpshot_bulk_read(us, reply, sizeof(reply));
+	rc = jumpshot_bulk_read(us, reply, 512);
 	if (rc != USB_STOR_XFER_GOOD) {
 		rc = USB_STOR_TRANSPORT_ERROR;
 		goto leave;

fs/hpfs/dir.c

@@ -65,6 +65,8 @@ int hpfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	int c1, c2 = 0;
 	int ret = 0;
 
+	lock_kernel();
+
 	if (hpfs_sb(inode->i_sb)->sb_chk) {
 		if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) {
 			ret = -EFSERROR;

include/linux/blkdev.h

@@ -82,6 +82,8 @@ struct request_list {
 	wait_queue_head_t wait[2];
 };
 
+#define BLK_MAX_CDB	16
+
 /*
  * try to put the fields that are referenced together in the same cacheline
  */
@@ -147,7 +149,7 @@ struct request {
 	 * when request is used as a packet command carrier
 	 */
 	unsigned int cmd_len;
-	unsigned char cmd[16];
+	unsigned char cmd[BLK_MAX_CDB];
 
 	unsigned int data_len;
 	void *data;

include/linux/list.h

@@ -208,6 +208,18 @@ static inline int list_empty(const struct list_head *head)
 	return head->next == head;
 }
 
+/**
+ * list_empty_careful - tests whether a list is
+ * empty _and_ checks that no other CPU might be
+ * in the process of still modifying either member
+ * @head: the list to test.
+ */
+static inline int list_empty_careful(const struct list_head *head)
+{
+	struct list_head *next = head->next;
+	return (next == head) && (next == head->prev);
+}
+
 static inline void __list_splice(struct list_head *list,
 				 struct list_head *head)
 {

kernel/exit.c

@@ -49,9 +49,11 @@ static void __unhash_process(struct task_struct *p)
 
 void release_task(struct task_struct * p)
 {
+	int zap_leader;
 	task_t *leader;
 	struct dentry *proc_dentry;
- 
+
+repeat: 
 	BUG_ON(p->state < TASK_ZOMBIE);
  
 	atomic_dec(&p->user->processes);
@@ -70,10 +72,21 @@ void release_task(struct task_struct * p)
 	 * group, and the leader is zombie, then notify the
 	 * group leader's parent process. (if it wants notification.)
 	 */
+	zap_leader = 0;
 	leader = p->group_leader;
-	if (leader != p && thread_group_empty(leader) &&
-		    leader->state == TASK_ZOMBIE && leader->exit_signal != -1)
+	if (leader != p && thread_group_empty(leader) && leader->state == TASK_ZOMBIE) {
+		BUG_ON(leader->exit_signal == -1);
 		do_notify_parent(leader, leader->exit_signal);
+		/*
+		 * If we were the last child thread and the leader has
+		 * exited already, and the leader's parent ignores SIGCHLD,
+		 * then we are the one who should release the leader.
+		 *
+		 * do_notify_parent() will have marked it self-reaping in
+		 * that case.
+		 */
+		zap_leader = (leader->exit_signal == -1);
+	}
 
 	p->parent->cutime += p->utime + p->cutime;
 	p->parent->cstime += p->stime + p->cstime;
@@ -88,6 +101,10 @@ void release_task(struct task_struct * p)
 	proc_pid_flush(proc_dentry);
 	release_thread(p);
 	put_task_struct(p);
+
+	p = leader;
+	if (unlikely(zap_leader))
+		goto repeat;
 }
 
 /* we are using it only for SMP init */

kernel/fork.c

@@ -125,15 +125,28 @@ void remove_wait_queue(wait_queue_head_t *q, wait_queue_t * wait)
 
 EXPORT_SYMBOL(remove_wait_queue);
 
+
+/*
+ * Note: we use "set_current_state()" _after_ the wait-queue add,
+ * because we need a memory barrier there on SMP, so that any
+ * wake-function that tests for the wait-queue being active
+ * will be guaranteed to see waitqueue addition _or_ subsequent
+ * tests in this thread will see the wakeup having taken place.
+ *
+ * The spin_unlock() itself is semi-permeable and only protects
+ * one way (it only protects stuff inside the critical region and
+ * stops them from bleeding out - it would still allow subsequent
+ * loads to move into the the critical region).
+ */
 void prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
 {
 	unsigned long flags;
 
-	__set_current_state(state);
 	wait->flags &= ~WQ_FLAG_EXCLUSIVE;
 	spin_lock_irqsave(&q->lock, flags);
 	if (list_empty(&wait->task_list))
 		__add_wait_queue(q, wait);
+	set_current_state(state);
 	spin_unlock_irqrestore(&q->lock, flags);
 }
 
@@ -144,11 +157,11 @@ prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int state)
 {
 	unsigned long flags;
 
-	__set_current_state(state);
 	wait->flags |= WQ_FLAG_EXCLUSIVE;
 	spin_lock_irqsave(&q->lock, flags);
 	if (list_empty(&wait->task_list))
 		__add_wait_queue_tail(q, wait);
+	set_current_state(state);
 	spin_unlock_irqrestore(&q->lock, flags);
 }
 
@@ -159,7 +172,20 @@ void finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
 	unsigned long flags;
 
 	__set_current_state(TASK_RUNNING);
-	if (!list_empty(&wait->task_list)) {
+	/*
+	 * We can check for list emptiness outside the lock
+	 * IFF:
+	 *  - we use the "careful" check that verifies both
+	 *    the next and prev pointers, so that there cannot
+	 *    be any half-pending updates in progress on other
+	 *    CPU's that we haven't seen yet (and that might
+	 *    still change the stack area.
+	 * and
+	 *  - all other users take the lock (ie we can only
+	 *    have _one_ other CPU that looks at or modifies
+	 *    the list).
+	 */
+	if (!list_empty_careful(&wait->task_list)) {
 		spin_lock_irqsave(&q->lock, flags);
 		list_del_init(&wait->task_list);
 		spin_unlock_irqrestore(&q->lock, flags);

lib/kobject.c

@@ -236,8 +236,6 @@ static void unlink(struct kobject * kobj)
 		list_del_init(&kobj->entry);
 		up_write(&kobj->kset->subsys->rwsem);
 	}
-	if (kobj->parent) 
-		kobject_put(kobj->parent);
 	kobject_put(kobj);
 }
 
@@ -274,9 +272,11 @@ int kobject_add(struct kobject * kobj)
 	kobj->parent = parent;
 
 	error = create_dir(kobj);
-	if (error)
+	if (error) {
 		unlink(kobj);
-	else {
+		if (parent)
+			kobject_put(parent);
+	} else {
 		/* If this kobj does not belong to a kset,
 		   try to find a parent that does. */
 		top_kobj = kobj;
@@ -452,6 +452,7 @@ void kobject_cleanup(struct kobject * kobj)
 {
 	struct kobj_type * t = get_ktype(kobj);
 	struct kset * s = kobj->kset;
+	struct kobject * parent = kobj->parent;
 
 	pr_debug("kobject %s: cleaning up\n",kobject_name(kobj));
 	if (kobj->k_name != kobj->name)
@@ -461,6 +462,8 @@ void kobject_cleanup(struct kobject * kobj)
 		t->release(kobj);
 	if (s)
 		kset_put(s);
+	if (parent) 
+		kobject_put(parent);
 }
 
 /**

scripts/file2alias.c

@@ -52,6 +52,13 @@ static int do_usb_entry(const char *filename,
 	id->bcdDevice_lo = TO_NATIVE(id->bcdDevice_lo);
 	id->bcdDevice_hi = TO_NATIVE(id->bcdDevice_hi);
 
+	/*
+	 * Some modules (visor) have empty slots as placeholder for
+	 * run-time specification that results in catch-all alias
+	 */
+	if (!(id->idVendor | id->bDeviceClass | id->bInterfaceClass))
+		return 1;
+
 	strcpy(alias, "usb:");
 	ADD(alias, "v", id->match_flags&USB_DEVICE_ID_MATCH_VENDOR,
 	    id->idVendor);