mISDN: fix misdn_add_timer()/misdn_del_timer() race

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do add_timer() *before* unlocking dev->lock, or unpleasant things can
happen if misdn_del_timer() on another CPU finds the sucker, calls
del_timer_sync() (which does nothing, since we hadn't started the
timer yet) and frees it, just as we get around to add_timer()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Al Viro 2013-04-15 17:04:04 -04:00

parent 1b1089561c

commit 1678ec00a6

1 changed files with 5 additions and 9 deletions

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14

drivers/isdn/mISDN/timerdev.c

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