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  1. 30 Jul, 2004 3 commits
    • David Brownell's avatar
      [PATCH] USB: add CONFIG_USB_SUSPEND · 5104332e
      David Brownell authored 
      This is the core of the USB_SUSPEND functionality.  Please merge.

This adds an experimental CONFIG_USB_SUSPEND option, which supports the
USB "suspend" state.  Linux-USB hosts have previously ignored that state.

    -	New driver API calls, usb_suspend_device() and its
	sibling usb_resume_device().

    -	Access to those calls through sysfs, such as
		echo -n 2 > power/state
		echo -n 0 > power/state

That can be used to reduce the power consumption of any given USB device,
then re-activate it later.  Eventually, most USB device drivers should
probably suspend idle USB devices.

One problem with this patch:  USB drivers without suspend() callbacks
may badly misbehave.  Right now only hub drivers know suspend().  If the
driver core didn't self-deadlock when we try it, unbinding those drivers
from those devices (then re-enumerating on resume) would be perfect...
the current compromise is just to emit a warning message.

In conjunction with host controller driver support (already merged for
OHCI and EHCI), PCI host controllers will issue the PME# wakeup signal
when a USB keyboard starts remote wakeup signaling.  (But the keyboard
wasn't usable later, since HID doesn't try to suspend.)

I understand some ACPI patches are circulating, and maybe already in
the MM tree, to make a suspended system wake up given PME# signaling.
It'd be great if someone made that work transparently with USB, but
for now I'm told it'll need some sysfs setup first.
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
      5104332e
    • Alan Stern's avatar
      [PATCH] USB: Make removable-LUN support a non-test option in the g_file_storage driver · 8d784571
      Alan Stern authored 
      This patch follows the suggestions sent by Todd Fischer and Diego Dompe
for making removable-LUN support part of the normal non-testing version of
the g_file_storage driver.  It also moves LUN device registration to the
correct place and eliminates a code path that stalls the bulk-out pipe in
a racy way.

There are also some smaller changes: update some comments, add initial
debugging support for USB suspend/resume, and miscellaneous code cleanups.
Last but not least, the driver has been sufficiently stable for
sufficiently long that it's fair to remove the "(DEVELOPMENT)" warning in
Kconfig.
Sent-by: default avatarTodd Fischer <toddf@cadenux.com>
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
      8d784571
    • Alan Stern's avatar
      [PATCH] USB: Fix NULL-pointer bug in dummy_hcd · feb4edac
      Alan Stern authored 
      This patch fixes a NULL-pointer-dereference bug in the dummy_hcd driver.
It also makes the code slightly more elegant and removes an unnecessary
buffer-overflow test.  Unfortunately it's still a little bit racy, but
this is a fault it shares with other gadget controller drivers, like
net2280.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
      feb4edac
  3. 29 Jul, 2004 25 commits
  5. 28 Jul, 2004 12 commits
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