bas_gigaset: fix pre_reset handling
authorTilman Schmidt <tilman@imap.cc>
Wed, 24 Oct 2012 08:44:32 +0000 (08:44 +0000)
committerDavid S. Miller <davem@davemloft.net>
Fri, 26 Oct 2012 06:20:36 +0000 (02:20 -0400)
commitc6fdd8e5d0c65bb8821dc6da26ee1a2ddd58b3cc
tree3a7b4adf2480e45fdc07702d2708291a496a7c9b
parent910a578f7e9400a78a3b13aba0b4d2df16a2cb05
bas_gigaset: fix pre_reset handling

The delayed work function int_in_work() may call usb_reset_device()
and thus, indirectly, the driver's pre_reset method. Trying to
cancel the work synchronously in that situation would deadlock.
Fix by avoiding cancel_work_sync() in the pre_reset method.

If the reset was NOT initiated by int_in_work() this might cause
int_in_work() to run after the post_reset method, with urb_int_in
already resubmitted, so handle that case gracefully.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/isdn/gigaset/bas-gigaset.c