---

yaml
---
r: 16774
b: refs/heads/master
c: 8995b16
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fe5dd7c73d328b255286b6b65ca19dd34447f709
+refs/heads/master: 8995b161eb142b843094dd614b80e4cce1d66352

trunk/Documentation/DocBook/kernel-api.tmpl

@@ -369,6 +369,7 @@ X!Edrivers/acpi/motherboard.c
 X!Edrivers/acpi/bus.c
 -->
 !Edrivers/acpi/scan.c
+!Idrivers/acpi/scan.c
 <!-- No correct structured comments
 X!Edrivers/acpi/pci_bind.c
 -->

trunk/Documentation/kernel-parameters.txt

@@ -1176,6 +1176,10 @@ running once the system is up.
 			Limit processor to maximum C-state
 			max_cstate=9 overrides any DMI blacklist limit.
 
+	processor.nocst	[HW,ACPI]
+			Ignore the _CST method to determine C-states,
+			instead using the legacy FADT method
+
 	prompt_ramdisk=	[RAM] List of RAM disks to prompt for floppy disk
 			before loading.
 			See Documentation/ramdisk.txt.

trunk/Documentation/pm.txt

@@ -218,7 +218,7 @@ proceed in the opposite direction.
 Q: Who do I contact for additional information about
    enabling power management for my specific driver/device?
 
-ACPI Development mailing list: acpi-devel@lists.sourceforge.net
+ACPI Development mailing list: linux-acpi@vger.kernel.org
 
 System Interface -- OBSOLETE, DO NOT USE!
 ----------------*************************

trunk/MAINTAINERS

@@ -182,7 +182,7 @@ S:	Supported
 ACPI
 P:	Len Brown
 M:	len.brown@intel.com
-L:	acpi-devel@lists.sourceforge.net
+L:	linux-acpi@vger.kernel.org
 W:	http://acpi.sourceforge.net/
 T:	git kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
 S:	Maintained

trunk/drivers/acpi/Kconfig

@@ -168,7 +168,6 @@ config ACPI_NUMA
 config ACPI_ASUS
         tristate "ASUS/Medion Laptop Extras"
 	depends on X86
-	default y
         ---help---
           This driver provides support for extra features of ACPI-compatible
           ASUS laptops. As some of Medion laptops are made by ASUS, it may also
@@ -209,7 +208,6 @@ config ACPI_IBM
 config ACPI_TOSHIBA
 	tristate "Toshiba Laptop Extras"
 	depends on X86
-	default y
 	---help---
 	  This driver adds support for access to certain system settings
 	  on "legacy free" Toshiba laptops.  These laptops can be recognized by

trunk/drivers/acpi/scan.c

@@ -475,8 +475,10 @@ static LIST_HEAD(acpi_bus_drivers);
 static DECLARE_MUTEX(acpi_bus_drivers_lock);
 
 /**
- * acpi_bus_match 
- * --------------
+ * acpi_bus_match - match device IDs to driver's supported IDs
+ * @device: the device that we are trying to match to a driver
+ * @driver: driver whose device id table is being checked
+ *
  * Checks the device's hardware (_HID) or compatible (_CID) ids to see if it
  * matches the specified driver's criteria.
  */
@@ -489,8 +491,10 @@ acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver)
 }
 
 /**
- * acpi_bus_driver_init 
- * --------------------
+ * acpi_bus_driver_init - add a device to a driver
+ * @device: the device to add and initialize
+ * @driver: driver for the device
+ *
  * Used to initialize a device via its device driver.  Called whenever a 
  * driver is bound to a device.  Invokes the driver's add() and start() ops.
  */
@@ -603,8 +607,9 @@ static int acpi_driver_detach(struct acpi_driver *drv)
 }
 
 /**
- * acpi_bus_register_driver 
- * ------------------------ 
+ * acpi_bus_register_driver - register a driver with the ACPI bus
+ * @driver: driver being registered
+ *
  * Registers a driver with the ACPI bus.  Searches the namespace for all
  * devices that match the driver's criteria and binds.  Returns the
  * number of devices that were claimed by the driver, or a negative
@@ -633,8 +638,9 @@ int acpi_bus_register_driver(struct acpi_driver *driver)
 EXPORT_SYMBOL(acpi_bus_register_driver);
 
 /**
- * acpi_bus_unregister_driver 
- * --------------------------
+ * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
+ * @driver: driver to unregister
+ *
  * Unregisters a driver with the ACPI bus.  Searches the namespace for all
  * devices that match the driver's criteria and unbinds.
  */
@@ -660,8 +666,9 @@ int acpi_bus_unregister_driver(struct acpi_driver *driver)
 EXPORT_SYMBOL(acpi_bus_unregister_driver);
 
 /**
- * acpi_bus_find_driver 
- * --------------------
+ * acpi_bus_find_driver - check if there is a driver installed for the device
+ * @device: device that we are trying to find a supporting driver for
+ *
  * Parses the list of registered drivers looking for a driver applicable for
  * the specified device.
  */

trunk/drivers/acpi/tables.c

@@ -37,7 +37,7 @@
 
 #define PREFIX			"ACPI: "
 
-#define ACPI_MAX_TABLES		256
+#define ACPI_MAX_TABLES		128
 
 static char *acpi_table_signatures[ACPI_TABLE_COUNT] = {
 	[ACPI_TABLE_UNKNOWN] = "????",
@@ -74,7 +74,7 @@ struct acpi_table_sdt {
 static unsigned long sdt_pa;	/* Physical Address */
 static unsigned long sdt_count;	/* Table count */
 
-static struct acpi_table_sdt sdt_entry[ACPI_MAX_TABLES];
+static struct acpi_table_sdt sdt_entry[ACPI_MAX_TABLES] __initdata;
 
 void acpi_table_print(struct acpi_table_header *header, unsigned long phys_addr)
 {

trunk/drivers/mmc/mmc.c

@@ -550,6 +550,11 @@ static void mmc_decode_csd(struct mmc_card *card)
 		csd->capacity	  = (1 + m) << (e + 2);
 
 		csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 	} else {
 		/*
 		 * We only understand CSD structure v1.1 and v1.2.
@@ -579,6 +584,11 @@ static void mmc_decode_csd(struct mmc_card *card)
 		csd->capacity	  = (1 + m) << (e + 2);
 
 		csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 	}
 }
 

trunk/drivers/mmc/mmc_block.c

@@ -54,6 +54,7 @@ struct mmc_blk_data {
 
 	unsigned int	usage;
 	unsigned int	block_bits;
+	unsigned int	read_only;
 };
 
 static DECLARE_MUTEX(open_lock);
@@ -85,12 +86,6 @@ static void mmc_blk_put(struct mmc_blk_data *md)
 	up(&open_lock);
 }
 
-static inline int mmc_blk_readonly(struct mmc_card *card)
-{
-	return mmc_card_readonly(card) ||
-	       !(card->csd.cmdclass & CCC_BLOCK_WRITE);
-}
-
 static int mmc_blk_open(struct inode *inode, struct file *filp)
 {
 	struct mmc_blk_data *md;
@@ -102,8 +97,7 @@ static int mmc_blk_open(struct inode *inode, struct file *filp)
 			check_disk_change(inode->i_bdev);
 		ret = 0;
 
-		if ((filp->f_mode & FMODE_WRITE) &&
-			mmc_blk_readonly(md->queue.card))
+		if ((filp->f_mode & FMODE_WRITE) && md->read_only)
 			ret = -EROFS;
 	}
 
@@ -299,6 +293,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 
 static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))];
 
+static inline int mmc_blk_readonly(struct mmc_card *card)
+{
+	return mmc_card_readonly(card) ||
+	       !(card->csd.cmdclass & CCC_BLOCK_WRITE);
+}
+
 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 {
 	struct mmc_blk_data *md;
@@ -310,64 +310,121 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	__set_bit(devidx, dev_use);
 
 	md = kmalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
-	if (md) {
-		memset(md, 0, sizeof(struct mmc_blk_data));
+	if (!md) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
-		md->disk = alloc_disk(1 << MMC_SHIFT);
-		if (md->disk == NULL) {
-			kfree(md);
-			md = ERR_PTR(-ENOMEM);
-			goto out;
-		}
+	memset(md, 0, sizeof(struct mmc_blk_data));
 
-		spin_lock_init(&md->lock);
-		md->usage = 1;
+	/*
+	 * Set the read-only status based on the supported commands
+	 * and the write protect switch.
+	 */
+	md->read_only = mmc_blk_readonly(card);
 
-		ret = mmc_init_queue(&md->queue, card, &md->lock);
-		if (ret) {
-			put_disk(md->disk);
-			kfree(md);
-			md = ERR_PTR(ret);
-			goto out;
+	/*
+	 * Figure out a workable block size.  MMC cards have:
+	 *  - two block sizes, one for read and one for write.
+	 *  - may support partial reads and/or writes
+	 *    (allows block sizes smaller than specified)
+	 */
+	md->block_bits = card->csd.read_blkbits;
+	if (card->csd.write_blkbits != card->csd.read_blkbits) {
+		if (card->csd.write_blkbits < card->csd.read_blkbits &&
+		    card->csd.read_partial) {
+			/*
+			 * write block size is smaller than read block
+			 * size, but we support partial reads, so choose
+			 * the smaller write block size.
+			 */
+			md->block_bits = card->csd.write_blkbits;
+		} else if (card->csd.write_blkbits > card->csd.read_blkbits &&
+			   card->csd.write_partial) {
+			/*
+			 * read block size is smaller than write block
+			 * size, but we support partial writes.  Use read
+			 * block size.
+			 */
+		} else {
+			/*
+			 * We don't support this configuration for writes.
+			 */
+			printk(KERN_ERR "%s: unable to select block size for "
+				"writing (rb%u wb%u rp%u wp%u)\n",
+				md->disk->disk_name,
+				1 << card->csd.read_blkbits,
+				1 << card->csd.write_blkbits,
+				card->csd.read_partial,
+				card->csd.write_partial);
+			md->read_only = 1;
 		}
-		md->queue.prep_fn = mmc_blk_prep_rq;
-		md->queue.issue_fn = mmc_blk_issue_rq;
-		md->queue.data = md;
+	}
 
-		md->disk->major	= major;
-		md->disk->first_minor = devidx << MMC_SHIFT;
-		md->disk->fops = &mmc_bdops;
-		md->disk->private_data = md;
-		md->disk->queue = md->queue.queue;
-		md->disk->driverfs_dev = &card->dev;
+	/*
+	 * Refuse to allow block sizes smaller than 512 bytes.
+	 */
+	if (md->block_bits < 9) {
+		printk(KERN_ERR "%s: unable to support block size %u\n",
+			mmc_card_id(card), 1 << md->block_bits);
+		ret = -EINVAL;
+		goto err_kfree;
+	}
 
-		/*
-		 * As discussed on lkml, GENHD_FL_REMOVABLE should:
-		 *
-		 * - be set for removable media with permanent block devices
-		 * - be unset for removable block devices with permanent media
-		 *
-		 * Since MMC block devices clearly fall under the second
-		 * case, we do not set GENHD_FL_REMOVABLE.  Userspace
-		 * should use the block device creation/destruction hotplug
-		 * messages to tell when the card is present.
-		 */
+	md->disk = alloc_disk(1 << MMC_SHIFT);
+	if (md->disk == NULL) {
+		ret = -ENOMEM;
+		goto err_kfree;
+	}
 
-		sprintf(md->disk->disk_name, "mmcblk%d", devidx);
-		sprintf(md->disk->devfs_name, "mmc/blk%d", devidx);
+	spin_lock_init(&md->lock);
+	md->usage = 1;
 
-		md->block_bits = card->csd.read_blkbits;
+	ret = mmc_init_queue(&md->queue, card, &md->lock);
+	if (ret)
+		goto err_putdisk;
 
-		blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
+	md->queue.prep_fn = mmc_blk_prep_rq;
+	md->queue.issue_fn = mmc_blk_issue_rq;
+	md->queue.data = md;
 
-		/*
-		 * The CSD capacity field is in units of read_blkbits.
-		 * set_capacity takes units of 512 bytes.
-		 */
-		set_capacity(md->disk, card->csd.capacity << (card->csd.read_blkbits - 9));
-	}
- out:
+	md->disk->major	= major;
+	md->disk->first_minor = devidx << MMC_SHIFT;
+	md->disk->fops = &mmc_bdops;
+	md->disk->private_data = md;
+	md->disk->queue = md->queue.queue;
+	md->disk->driverfs_dev = &card->dev;
+
+	/*
+	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
+	 *
+	 * - be set for removable media with permanent block devices
+	 * - be unset for removable block devices with permanent media
+	 *
+	 * Since MMC block devices clearly fall under the second
+	 * case, we do not set GENHD_FL_REMOVABLE.  Userspace
+	 * should use the block device creation/destruction hotplug
+	 * messages to tell when the card is present.
+	 */
+
+	sprintf(md->disk->disk_name, "mmcblk%d", devidx);
+	sprintf(md->disk->devfs_name, "mmc/blk%d", devidx);
+
+	blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
+
+	/*
+	 * The CSD capacity field is in units of read_blkbits.
+	 * set_capacity takes units of 512 bytes.
+	 */
+	set_capacity(md->disk, card->csd.capacity << (card->csd.read_blkbits - 9));
 	return md;
+
+ err_putdisk:
+	put_disk(md->disk);
+ err_kfree:
+	kfree(md);
+ out:
+	return ERR_PTR(ret);
 }
 
 static int
@@ -403,12 +460,6 @@ static int mmc_blk_probe(struct mmc_card *card)
 	if (!(card->csd.cmdclass & CCC_BLOCK_READ))
 		return -ENODEV;
 
-	if (card->csd.read_blkbits < 9) {
-		printk(KERN_WARNING "%s: read blocksize too small (%u)\n",
-			mmc_card_id(card), 1 << card->csd.read_blkbits);
-		return -ENODEV;
-	}
-
 	md = mmc_blk_alloc(card);
 	if (IS_ERR(md))
 		return PTR_ERR(md);
@@ -419,7 +470,7 @@ static int mmc_blk_probe(struct mmc_card *card)
 
 	printk(KERN_INFO "%s: %s %s %luKiB %s\n",
 		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
-		get_capacity(md->disk) >> 1, mmc_blk_readonly(card)?"(ro)":"");
+		get_capacity(md->disk) >> 1, md->read_only ? "(ro)" : "");
 
 	mmc_set_drvdata(card, md);
 	add_disk(md->disk);