USB: make intf.pm_usage an atomic_t

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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>

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Alan Stern 2009-06-29 11:00:01 -04:00 • committed by Greg Kroah-Hartman

parent 7cbe5dca39

commit ccf5b801ce

3 changed files with 28 additions and 21 deletions

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6

include/linux/usb.h

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