Merge branch 'for-2.6.26' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.26' of git://git.kernel.dk/linux-2.6-block:
  block: fix blk_register_queue() return value
  block: fix memory hotplug and bouncing in block layer
  block: replace remaining __FUNCTION__ occurrences
  Kconfig: clean up block/Kconfig help descriptions
  cciss: fix warning oops on rmmod of driver
  cciss: Fix race between disk-adding code and interrupt handler
  block: move the padding adjustment to blk_rq_map_sg
  block: add bio_copy_user_iov support to blk_rq_map_user_iov
  block: convert bio_copy_user to bio_copy_user_iov
  loop: manage partitions in disk image
  cdrom: use kmalloced buffers instead of buffers on stack
  cdrom: make unregister_cdrom() return void
  cdrom: use list_head for cdrom_device_info list
  cdrom: protect cdrom_device_info list by mutex
  cdrom: cleanup hardcoded error-code
  cdrom: remove ifdef CONFIG_SYSCTL

4 files changed, 41 insertions, 10 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 9c9627e8e334..cf6083a1f928 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1349,6 +1349,10 @@ static void cciss_update_drive_info(int ctlr, int drv_index)
 		spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
 		h->drv[drv_index].busy_configuring = 1;
 		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+
+		/* deregister_disk sets h->drv[drv_index].queue = NULL */
+		/* which keeps the interrupt handler from starting */
+		/* the queue. */
 		ret = deregister_disk(h->gendisk[drv_index],
 				      &h->drv[drv_index], 0);
 		h->drv[drv_index].busy_configuring = 0;
@@ -1419,6 +1423,10 @@ geo_inq:
 		blk_queue_hardsect_size(disk->queue,
 					hba[ctlr]->drv[drv_index].block_size);
 
+		/* Make sure all queue data is written out before */
+		/* setting h->drv[drv_index].queue, as setting this */
+		/* allows the interrupt handler to start the queue */
+		wmb();
 		h->drv[drv_index].queue = disk->queue;
 		add_disk(disk);
 	}
@@ -3520,10 +3528,17 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 			continue;
 		blk_queue_hardsect_size(q, drv->block_size);
 		set_capacity(disk, drv->nr_blocks);
-		add_disk(disk);
 		j++;
 	} while (j <= hba[i]->highest_lun);
 
+	/* Make sure all queue data is written out before */
+	/* interrupt handler, triggered by add_disk,  */
+	/* is allowed to start them. */
+	wmb();
+
+	for (j = 0; j <= hba[i]->highest_lun; j++)
+		add_disk(hba[i]->gendisk[j]);
+
 	return 1;
 
       clean4:
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 45ac09300eb3..e4bf9a11ca0d 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -1349,9 +1349,9 @@ cciss_unregister_scsi(int ctlr)
 	/* set scsi_host to NULL so our detect routine will 
 	   find us on register */
 	sa->scsi_host = NULL;
+	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 	scsi_cmd_stack_free(ctlr);
 	kfree(sa);
-	spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
 }
 
 static int 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 91ebb007416c..f7f163557aa0 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -82,6 +82,9 @@
 static LIST_HEAD(loop_devices);
 static DEFINE_MUTEX(loop_devices_mutex);
 
+static int max_part;
+static int part_shift;
+
 /*
  * Transfer functions
  */
@@ -692,6 +695,8 @@ static int loop_change_fd(struct loop_device *lo, struct file *lo_file,
 		goto out_putf;
 
 	fput(old_file);
+	if (max_part > 0)
+		ioctl_by_bdev(bdev, BLKRRPART, 0);
 	return 0;
 
  out_putf:
@@ -819,6 +824,8 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
 	}
 	lo->lo_state = Lo_bound;
 	wake_up_process(lo->lo_thread);
+	if (max_part > 0)
+		ioctl_by_bdev(bdev, BLKRRPART, 0);
 	return 0;
 
 out_clr:
@@ -919,6 +926,8 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
 	fput(filp);
 	/* This is safe: open() is still holding a reference. */
 	module_put(THIS_MODULE);
+	if (max_part > 0)
+		ioctl_by_bdev(bdev, BLKRRPART, 0);
 	return 0;
 }
 
@@ -1360,6 +1369,8 @@ static struct block_device_operations lo_fops = {
 static int max_loop;
 module_param(max_loop, int, 0);
 MODULE_PARM_DESC(max_loop, "Maximum number of loop devices");
+module_param(max_part, int, 0);
+MODULE_PARM_DESC(max_part, "Maximum number of partitions per loop device");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
 
@@ -1412,7 +1423,7 @@ static struct loop_device *loop_alloc(int i)
 	if (!lo->lo_queue)
 		goto out_free_dev;
 
-	disk = lo->lo_disk = alloc_disk(1);
+	disk = lo->lo_disk = alloc_disk(1 << part_shift);
 	if (!disk)
 		goto out_free_queue;
 
@@ -1422,7 +1433,7 @@ static struct loop_device *loop_alloc(int i)
 	init_waitqueue_head(&lo->lo_event);
 	spin_lock_init(&lo->lo_lock);
 	disk->major		= LOOP_MAJOR;
-	disk->first_minor	= i;
+	disk->first_minor	= i << part_shift;
 	disk->fops		= &lo_fops;
 	disk->private_data	= lo;
 	disk->queue		= lo->lo_queue;
@@ -1502,7 +1513,12 @@ static int __init loop_init(void)
 	 *     themselves and have kernel automatically instantiate actual
 	 *     device on-demand.
 	 */
-	if (max_loop > 1UL << MINORBITS)
+
+	part_shift = 0;
+	if (max_part > 0)
+		part_shift = fls(max_part);
+
+	if (max_loop > 1UL << (MINORBITS - part_shift))
 		return -EINVAL;
 
 	if (max_loop) {
@@ -1510,7 +1526,7 @@ static int __init loop_init(void)
 		range = max_loop;
 	} else {
 		nr = 8;
-		range = 1UL << MINORBITS;
+		range = 1UL << (MINORBITS - part_shift);
 	}
 
 	if (register_blkdev(LOOP_MAJOR, "loop"))
@@ -1549,7 +1565,7 @@ static void __exit loop_exit(void)
 	unsigned long range;
 	struct loop_device *lo, *next;
 
-	range = max_loop ? max_loop :  1UL << MINORBITS;
+	range = max_loop ? max_loop :  1UL << (MINORBITS - part_shift);
 
 	list_for_each_entry_safe(lo, next, &loop_devices, lo_list)
 		loop_del_one(lo);
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index cd5674b63faf..a18e1ca0f761 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -79,9 +79,9 @@ MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30
 
 /* note: prints function name for you */
 #ifdef CARM_DEBUG
-#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
+#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 #ifdef CARM_VERBOSE_DEBUG
-#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
+#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 #else
 #define VPRINTK(fmt, args...)
 #endif	/* CARM_VERBOSE_DEBUG */
@@ -96,7 +96,7 @@ MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30
 #define assert(expr) \
         if(unlikely(!(expr))) {                                   \
         printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
-        #expr,__FILE__,__FUNCTION__,__LINE__);          \
+	#expr, __FILE__, __func__, __LINE__);          \
         }
 #endif