linux-toradex.git/drivers/base/core.c, branch v2.6.21.6

[PATCH] driver-core: don't free devt_attr till the device is released

2007-05-23T21:32:49+00:00

Currently, devt_attr for the "dev" file is freed immediately on device
removal, but if the "dev" sysfs file is open when a device is removed,
sysfs will access its attribute structure for further access including
close resulting in jumping to garbled address.  Fix it by postponing
freeing devt_attr to device release time.

Note that devt_attr for class_device is already freed on release.

This bug is reported by Chris Rankin as bugzilla bug#8198.

Signed-off-by: Tejun Heo 
Cc: Chris Rankin 
Signed-off-by: Chris Wright

[PATCH] remove protection of LANANA-reserved majors

2007-04-05T04:12:47+00:00

Revert all this.  It can cause device-mapper to receive a different major from
earlier kernels and it turns out that the Amanda backup program (via GNU tar,
apparently) checks major numbers on files when performing incremental backups.

Which is a bit broken of Amanda (or tar), but this feature isn't important
enough to justify the churn.

Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] sysfs and driver core: add callback helper, used by SCSI and S390

2007-03-15T22:29:26+00:00

This patch (as868) adds a helper routine for device drivers that need
to set up a callback to perform some action in a different process's
context.  This is intended for use by attribute methods that want to
unregister themselves or their parent device.  Attribute method calls
are mutually exclusive with unregistration, so such actions cannot be
taken directly.

Two attribute methods are converted to use the new helper routine: one
for SCSI device deletion and one for System/390 ccwgroup devices.

Signed-off-by: Alan Stern 
Cc: Hugh Dickins 
Cc: Cornelia Huck 
Cc: Oliver Neukum 
Signed-off-by: Linus Torvalds

driver core: export device_rename

2007-03-09T23:32:58+00:00

In wireless we'd like to allow renaming of the phy devices we surface in
sysfs. The base wireless code, however, can be built modular and thus we
need device_rename exported.

Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

Driver core: add device symlink back to sysfs

2007-03-09T23:32:58+00:00

This moves the device symlink back to sysfs even if
CONFIG_SYSFS_DEPRECATED is enabled as too many userspace programs (well,
HAL), still rely on this link to be present.

I will rework the ability for sysfs to change layouts like this in the
future, but for now, this patch should fix people's network connections.

Cc: Kay Sievers 
Cc: Matt Mackall 
Signed-off-by: Greg Kroah-Hartman

devres: release resources on device_del()

2007-03-09T13:41:16+00:00

Some platform devices are driven without driver attached, so managed
resources can be acquired without driver attached.  Make sure such
resources are released by calling devres_release_all() in
device_del().

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

Driver core: fix error by cleanup up symlinks properly

2007-02-23T22:52:09+00:00

When a device fails to register the class symlinks where not cleaned up.
This left a symlink in the /sys/class/"device"/ directory that pointed
to no where. This caused the sysfs_follow_link Oops I reported earlier.
This patch cleanups up the symlink. Please apply. Thank you.

Signed-Off: James Simmons 
Signed-off-by: Greg Kroah-Hartman

[PATCH] rework reserved major handling

2007-02-21T01:10:13+00:00

Several people have reported failures in dynamic major device number handling
due to the recent changes in there to avoid handing out the local/experimental
majors.

Rolf reports that this is due to a gcc-4.1.0 bug.

The patch refactors that code a lot in an attempt to provoke the compiler into
behaving.

Cc: Rolf Eike Beer 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

devres: device resource management

2007-02-09T22:39:36+00:00

Implement device resource management, in short, devres.  A device
driver can allocate arbirary size of devres data which is associated
with a release function.  On driver detach, release function is
invoked on the devres data, then, devres data is freed.

devreses are typed by associated release functions.  Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function.  Both usages are
supported.

devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).

This patch adds devres core including documentation and the following
managed interfaces.

* alloc/free	: devm_kzalloc(), devm_kzfree()
* IO region	: devm_request_region(), devm_release_region()
* IRQ		: devm_request_irq(), devm_free_irq()
* DMA		: dmam_alloc_coherent(), dmam_free_coherent(),
		  dmam_declare_coherent_memory(), dmam_pool_create(),
		  dmam_pool_destroy()
* PCI		: pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap		: devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
		  devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
		  pcim_iomap(), pcim_iounmap()

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

Driver core: allow to delay the uevent at device creation time

2007-02-07T18:37:14+00:00

For the block subsystem, we want to delay all uevents until the
disk has been scanned and allpartitons are already created before
the first event is sent out.

Signed-off-by: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman