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  1. 20 Jul, 2012 4 commits
    • Alan Stern's avatar
      HID: usbhid: replace HID_REPORTED_IDLE with HID_SUSPENDED · f2b5264d
      Alan Stern authored 
      This patch (as1595) improves the usbhid driver by using the
HID_SUSPENDED bitflag to indicate that the device is suspended rather
than using HID_REPORTED_IDLE, which the patch removes.

Since HID_SUSPENDED was not being used for anything, and since the
name "HID_REPORTED_IDLE" doesn't convey much meaning, the end result
is easier to read and understand.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      f2b5264d
    • Alan Stern's avatar
      HID: usbhid: inline some simple routines · 93101af3
      Alan Stern authored 
      This patch (as1594) simplifies the usbhid driver by inlining a couple
of routines.  As a result of an earlier patch, irq_out_pump_restart()
and ctrl_pump_restart() are each used in only one place.  Since they
don't really do what their names say, and since they each involve only
about two lines of actual code, there's no reason to keep them as
separate functions.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      93101af3
    • Alan Stern's avatar
      HID: usbhid: fix autosuspend calls · 01a7c984
      Alan Stern authored 
      This patch (as1593) fixes some logic errors in the usbhid driver
relating to runtime PM.  The driver does not balance its calls to
usb_autopm_get_interface_async() and usb_autopm_put_interface_async().

For example, when the control queue is restarted the driver does a
_get.  But the resume won't happen immediately, so the driver leaves
the queue stopped.  When the resume does occur, the queue is restarted
and a second _get occurs, with no balancing _put.

The patch fixes the problem by rearranging the logic for restarting
the queues.  All the _get/_put calls and bitflag settings in
__usbhid_submit_report() are moved into the queue-restart routines.  A
balancing _put call is added for the case where the queue is still
suspended.  A call to irq_out_pump_restart(), which doesn't take all
the right actions for restarting the irq-OUT queue, is replaced by a
call to usbhid_restart_out_queue(), which does.  Similarly for
ctrl_pump_restart().

Finally, new code is added to prevent an autosuspend from happening
every time an URB is cancelled, and the comments explaining what
happens when an URB needs to be cancelled are expanded and clarified.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      01a7c984
    • Alan Stern's avatar
      HID: usbhid: fix use-after-free bug · 668160e5
      Alan Stern authored 
      This patch (as1592) fixes an obscure problem in the usbhid driver.
Under some circumstances, a control or interrupt-OUT URB can be
submitted twice.  This will happen if the first submission fails; the
queue pointers aren't updated, so the next time the queue is restarted
the same URB will be submitted again.

The problem is that raw_report gets deallocated during the first
submission.  The second submission will then dereference and try to
free an already-freed region of memory.  The patch fixes the problem
by setting raw_report to NULL when it is deallocated and checking for
NULL before dereferencing it.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      668160e5
  3. 19 Jul, 2012 7 commits
  5. 18 Jul, 2012 17 commits
  7. 17 Jul, 2012 12 commits
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