linux.git/drivers/base/core.c, branch v3.6-rc2

driver-core: Use kobj_to_dev instead of re-implementing it

2012-07-17T01:05:45+00:00

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Greg Kroah-Hartman

driver core: fix shutdown races with probe/remove(v3)

2012-07-17T01:04:25+00:00

Firstly, .shutdown callback may touch a uninitialized hardware
if dev->driver is set and .probe is not completed.

Secondly, device_shutdown() may dereference a null pointer to cause
oops when dev->driver is cleared after it has been checked in
device_shutdown().

So just hold device lock and its parent lock(if it has) to
fix the races.

Cc: Alan Stern 
Signed-off-by: Ming Lei 
Signed-off-by: Greg Kroah-Hartman

driver core: always handle dpm_order

2012-06-11T22:58:04+00:00

If !dev->class, device_move() does not respect the dpm_order.
Fix it to do so.

Acked-by: Rafael J. Wysocki 
Signed-off-by: Rabin Vincent 
Reviewed-by: Srinidhi Kasagar 
[Fixed a small dangling label compile warning]
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

driver-core: extend dev_printk() to pass structured data

2012-05-08T00:12:03+00:00

Extends dev_printk() to attach a dictionary with a device identifier
and the driver core subsystem name to logged messages, which makes
dev_prink() reliable machine-readable. In addition to the printed
plain text message, it creates these properties:
    SUBSYSTEM=     - the driver-core subsytem name
    DEVICE=
      b12:8        - block dev_t
      c127:3       - char dev_t
      n8           - netdev ifindex
      +sound:card0 - subsystem:devname

Tested-by: William Douglas 
Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

drivers/base/core.c: Fix a typo in comment

2012-04-23T20:30:10+00:00

Signed-off-by: YanHong 
Signed-off-by: Greg Kroah-Hartman

core.c: fix 'the the' typo

2012-04-18T22:37:35+00:00

Signed-off-by: Peter Korsgaard 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6

2012-03-21T17:30:03+00:00

Pull core device tree changes for Linux v3.4 from Grant Likely:
 "This branch contains a minor documentation addition, a utility
  function for parsing string properties needed by some of the new ARM
  platforms, disables dynamic DT code that isn't used anywhere but on a
  few PPC machines, and exports DT node compatible data to userspace via
  UEVENT properties.  Nothing earth shattering here."

* tag 'dt-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  of: Only compile OF_DYNAMIC on PowerPC pseries and iseries
  arm/dts: OMAP3: Add omap3evm and am335xevm support
  drivercore: Output common devicetree information in uevent
  of: Add of_property_match_string() to find index into a string list

driver core: move the deferred probe pointer into the private area

2012-03-08T20:17:22+00:00

Nothing outside of the driver core needs to get to the deferred probe
pointer, so move it inside the private area of 'struct device' so no one
tries to mess around with it.

Cc: Grant Likely 
Signed-off-by: Greg Kroah-Hartman

drivercore: Add driver probe deferral mechanism

2012-03-08T19:53:13+00:00

Allow drivers to report at probe time that they cannot get all the resources
required by the device, and should be retried at a later time.

This should completely solve the problem of getting devices
initialized in the right order.  Right now this is mostly handled by
mucking about with initcall ordering which is a complete hack, and
doesn't even remotely handle the case where device drivers are in
modules.  This approach completely sidesteps the issues by allowing
driver registration to occur in any order, and any driver can request
to be retried after a few more other drivers get probed.

v4: - Integrate Manjunath's addition of a separate workqueue
    - Change -EAGAIN to -EPROBE_DEFER for drivers to trigger deferral
    - Update comment blocks to reflect how the code really works
v3: - Hold off workqueue scheduling until late_initcall so that the bulk
      of driver probes are complete before we start retrying deferred devices.
    - Tested with simple use cases.  Still needs more testing though.
      Using it to get rid of the gpio early_initcall madness, or to replace
      the ASoC internal probe deferral code would be ideal.
v2: - added locking so it should no longer be utterly broken in that regard
    - remove device from deferred list at device_del time.
    - Still completely untested with any real use case, but has been
      boot tested.

Signed-off-by: Grant Likely 
Cc: Mark Brown 
Cc: Arnd Bergmann 
Cc: Dilan Lee 
Cc: Manjunath GKondaiah 
Cc: Alan Stern 
Cc: Tony Lindgren 
Cc: Alan Cox 
Reviewed-by: Mark Brown 
Acked-by: David Daney 
Reviewed-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

drivercore: Output common devicetree information in uevent

2012-02-01T21:26:30+00:00

When userspace needs to find a specific device, it currently isn't easy to
resolve a /sys/devices/ path from a specific device tree node.  Nor is it
easy to obtain the compatible list for devices.

This patch generalizes the code that inserts OF_* values into the uevent
device attribute so that any device that is attached to an OF node will
have that information exported to userspace.  Without this patch only
platform devices and some powerpc-specific busses have access to this
data.

The original function also creates a MODALIAS property for the compatible
list, but that code has not been generalized into the common case because
it has the potential to break module loading on a lot of bus types.  Bus
types are still responsible for their own MODALIAS properties.

Boot tested on ARM and compile tested on PowerPC and SPARC.

Signed-off-by: Grant Likely 
Acked-by: Greg Kroah-Hartman 
Cc: Tobias Klauser 
Cc: Frederic Lambert 
Cc: Rob Herring 
Cc: Mark Brown 
Cc: "David S. Miller" 
Cc: Benjamin Herrenschmidt