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(parent: 7cbe5dc) | patch
USB: make intf.pm_usage an atomic_t
authorAlan Stern <stern@rowland.harvard.edu>
Mon, 29 Jun 2009 15:00:01 +0000 (11:00 -0400)
committerGreg Kroah-Hartman <gregkh@suse.de>
Wed, 23 Sep 2009 13:46:23 +0000 (06:46 -0700)
commitccf5b801cef4f9e2d708d3b87e91e2bc6abd5206
tree1b7de13df336f44f6f74657934e79dc8c0bfd142tree | snapshot
parent7cbe5dca399a50ce8aa74314b1d276e2fb904e1bcommit | diff
USB: make intf.pm_usage an atomic_t

This patch (as1260) changes the pm_usage_cnt field in struct
usb_interface from an int to an atomic_t.  This is so that drivers can
invoke the usb_autopm_get_interface_async() and
usb_autopm_put_interface_async() routines without locking and without
fear of corrupting the pm_usage_cnt value.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/driver.c diff | blob | history
drivers/usb/core/hub.c diff | blob | history
include/linux/usb.h diff | blob | history
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