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Commit ab69bcd6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (28 commits)
  driver core: device_rename's new_name can be const
  sysfs: Remove owner field from sysfs struct attribute
  powerpc/pci: Remove owner field from attribute initialization in PCI bridge init
  regulator: Remove owner field from attribute initialization in regulator core driver
  leds: Remove owner field from attribute initialization in bd2802 driver
  scsi: Remove owner field from attribute initialization in ARCMSR driver
  scsi: Remove owner field from attribute initialization in LPFC driver
  cgroupfs: create /sys/fs/cgroup to mount cgroupfs on
  Driver core: Add BUS_NOTIFY_BIND_DRIVER
  driver core: fix memory leak on one error path in bus_register()
  debugfs: no longer needs to depend on SYSFS
  sysfs: Fix one more signature discrepancy between sysfs implementation and docs.
  sysfs: fix discrepancies between implementation and documentation
  dcdbas: remove a redundant smi_data_buf_free in dcdbas_exit
  dmi-id: fix a memory leak in dmi_id_init error path
  sysfs: sysfs_chmod_file's attr can be const
  firmware: Update hotplug script
  Driver core: move platform device creation helpers to .init.text (if MODULE=n)
  Driver core: reduce duplicated code for platform_device creation
  Driver core: use kmemdup in platform_device_add_resources
  ...
parents c513b67e 6937e8f8

Documentation/DocBook/device-drivers.tmpl

+1 −0
Original line number Diff line number Diff line
@@ -111,6 +111,7 @@ X!Edrivers/base/attribute_container.c 
<!--

X!Edrivers/base/interface.c

-->

!Iinclude/linux/platform_device.h

!Edrivers/base/platform.c

!Edrivers/base/bus.c

     </sect1>

Documentation/filesystems/sysfs.txt

+26 −20
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ sysfs - _The_ filesystem for exporting kernel objects. 
Patrick Mochel	<mochel@osdl.org>

Mike Murphy <mamurph@cs.clemson.edu>



Revised:    22 February 2009

Revised:    15 July 2010

Original:   10 January 2003
@@ -124,7 +124,7 @@ show and store methods of the attribute owners. 


struct sysfs_ops {

        ssize_t (*show)(struct kobject *, struct attribute *, char *);

        ssize_t (*store)(struct kobject *, struct attribute *, const char *);

        ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t);

};



[ Subsystems should have already defined a struct kobj_type as a
@@ -139,18 +139,22 @@ calls the associated methods. 


To illustrate:



#define to_dev(obj) container_of(obj, struct device, kobj)

#define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)

#define to_dev(d) container_of(d, struct device, kobj)



static ssize_t

dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)

static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr,

                             char *buf)

{

        struct device_attribute *dev_attr = to_dev_attr(attr);

        struct device *dev = to_dev(kobj);

        ssize_t ret = 0;

        ssize_t ret = -EIO;



        if (dev_attr->show)

                ret = dev_attr->show(dev, buf);

                ret = dev_attr->show(dev, dev_attr, buf);

        if (ret >= (ssize_t)PAGE_SIZE) {

                print_symbol("dev_attr_show: %s returned bad count\n",

                                (unsigned long)dev_attr->show);

        }

        return ret;

}
@@ -163,10 +167,9 @@ To read or write attributes, show() or store() methods must be 
specified when declaring the attribute. The method types should be as

simple as those defined for device attributes:



ssize_t (*show)(struct device * dev, struct device_attribute * attr,

                char * buf);

ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf);

ssize_t (*store)(struct device *dev, struct device_attribute *attr,

                 const char * buf);

                 const char *buf, size_t count);



IOW, they should take only an object, an attribute, and a buffer as parameters.
@@ -209,8 +212,8 @@ Other notes: 


- show() should always use snprintf(). 



- store() should return the number of bytes used from the buffer. This

  can be done using strlen().

- store() should return the number of bytes used from the buffer. If the

  entire buffer has been used, just return the count argument.



- show() or store() can always return errors. If a bad value comes

  through, be sure to return an error.
@@ -223,15 +226,18 @@ Other notes: 


A very simple (and naive) implementation of a device attribute is:



static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)

static ssize_t show_name(struct device *dev, struct device_attribute *attr,

                         char *buf)

{

	return snprintf(buf, PAGE_SIZE, "%s\n", dev->name);

}



static ssize_t store_name(struct device * dev, const char * buf)

static ssize_t store_name(struct device *dev, struct device_attribute *attr,

                          const char *buf, size_t count)

{

	sscanf(buf, "%20s", dev->name);

	return strnlen(buf, PAGE_SIZE);

        snprintf(dev->name, sizeof(dev->name), "%.*s",

                 (int)min(count, sizeof(dev->name) - 1), buf);

	return count;

}



static DEVICE_ATTR(name, S_IRUGO, show_name, store_name);
@@ -327,7 +333,7 @@ Structure: 
struct bus_attribute {

        struct attribute        attr;

        ssize_t (*show)(struct bus_type *, char * buf);

        ssize_t (*store)(struct bus_type *, const char * buf);

        ssize_t (*store)(struct bus_type *, const char * buf, size_t count);

};



Declaring:

Documentation/firmware_class/hotplug-script

+9 −8
Original line number Diff line number Diff line
@@ -6,11 +6,12 @@ 


HOTPLUG_FW_DIR=/usr/lib/hotplug/firmware/



if [ "$SUBSYSTEM" == "firmware" -a "$ACTION" == "add" ]; then

  if [ -f $HOTPLUG_FW_DIR/$FIRMWARE ]; then

    echo 1 > /sys/$DEVPATH/loading

    cat $HOTPLUG_FW_DIR/$FIRMWARE > /sys/$DEVPATH/data

    echo 0 > /sys/$DEVPATH/loading



# To cancel the load in case of error:

#

#	echo -1 > /sys/$DEVPATH/loading

#
 
  else

    echo -1 > /sys/$DEVPATH/loading

  fi

fi

arch/powerpc/sysdev/mv64x60_pci.c

+0 −1
Original line number Diff line number Diff line
@@ -73,7 +73,6 @@ static struct bin_attribute mv64x60_hs_reg_attr = { /* Hotswap register */ 
	.attr = {

		.name = "hs_reg",

		.mode = S_IRUGO | S_IWUSR,

		.owner = THIS_MODULE,

	},

	.size  = MV64X60_VAL_LEN_MAX,

	.read  = mv64x60_hs_reg_read,

drivers/base/bus.c

+1 −1
Original line number Diff line number Diff line
@@ -945,8 +945,8 @@ int bus_register(struct bus_type *bus) 
	bus_remove_file(bus, &bus_attr_uevent);

bus_uevent_fail:

	kset_unregister(&bus->p->subsys);

	kfree(bus->p);

out:

	kfree(bus->p);

	bus->p = NULL;

	return retval;

}