linux.git/drivers/usb/core/driver.c, branch v2.6.20

usbcore: remove unused argument in autosuspend

2006-12-01T22:25:53+00:00

Thanks to several earlier patches, usb_autosuspend_device() and
usb_autoresume_device() are never called with a second argument other
than 1.  This patch (as819) removes the now-redundant argument.

It also consolidates some common code between those two routines,
putting it into a new subroutine called usb_autopm_do_device().  And
it includes a sizable kerneldoc update for the affected functions.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: keep count of unsuspended children

2006-12-01T22:25:52+00:00

This patch (as818b) simplifies autosuspend processing by keeping track
of the number of unsuspended children of each USB hub.  This will
permit us to avoid a good deal of unnecessary work all the time; we
will no longer have to create a bunch of workqueue entries to carry
out autosuspend requests, only to have them fail because one of the
hub's children isn't suspended.

The basic idea is simple.  There already is a usage counter in the
usb_device structure for preventing autosuspends.  The patch just
increments that counter for every unsuspended child.  There's only one
tricky part: When a device disconnects we need to remember whether it
was suspended at the time (leave the counter alone) or not (decrement
the counter).

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: make drivers/usb/core/driver.c:usb_device_match() static

2006-12-01T22:23:37+00:00

usb_device_match() can now become static.

Signed-off-by: Adrian Bunk 
Signed-off-by: Greg Kroah-Hartman

USB: resume_device symbol conflict

2006-12-01T22:23:30+00:00

Several functions in USB core overlap with global functions.
The linker appears to do the right thing, but it is bad practice and makes
debugging harder.

Signed-off-by: Stephen Hemminger 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: expand autosuspend/autoresume API

2006-12-01T22:23:30+00:00

This patch (as814) adds usb_autopm_set_interface() to the autosuspend
API.  It also provides convenient wrapper routines,
usb_autopm_enable() and usb_autopm_disable(), for drivers that want
to specify directly whether autosuspend should be allowed.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: autosuspend code consolidation

2006-12-01T22:23:29+00:00

This patch (as813) gathers together common code for USB interface
autosuspend/autoresume. 

It also adds some simple checking at the time an autosuspend request
is made, to see whether the request will fail.  This way we don't
add a workqueue entry when it would end up doing nothing.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB core: don't match interface descriptors for vendor-specific devices

2006-12-01T22:23:27+00:00

This patch (as804) makes USB driver matching ignore the interface
class, subclass, and protocol if the device class is Vendor Specific.
Drivers can override this policy by specifying a Vendor ID as part
of the match; then vendor-specific matches are allowed.

Linus Walleij has reported a problem this patch fixes.  When a
particular mass-storage device is switched from mass-storage mode to
Media Transfer Protocol, the interface class remains set to mass-storage
and usb-storage binds to it erroneously, even though the device class
changes to Vendor-Specific.

This may cause a problem for some drivers until their match records can
be updated to include Vendor IDs.  But if it does, then those records
were broken to begin with.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: fix autosuspend when CONFIG_PM isn't set

2006-09-28T22:36:46+00:00

This patch (as791b) fixes things up to avoid compiler warnings or
errors when CONFIG_USB_SUSPEND or CONFIG_PM isn't set.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: create new workqueue thread for USB autosuspend

2006-09-28T22:36:44+00:00

This patch (as787) creates a new workqueue thread to handle delayed
USB autosuspend requests.  Previously the code used keventd.  However
it turns out that the hub driver's suspend routine calls
flush_scheduled_work(), making it a poor candidate for running in
keventd (the call immediately deadlocks).  The solution is to use a
new thread instead of keventd.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: fixes kerneldoc errors in usbcore-auto(susp/res)-patch

2006-09-28T22:36:44+00:00

Fixes kerneldoc errors on usb/core/driver.c, which occured in 2.6.18-rc6-mm2
gregkh-usb-usbcore-add-autosuspend-autoresume-infrastructure.patch

Signed-off-by: Henrik Kretzschmar 
Acked-by: Alan Stern 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman