From 45cd5e2d4e632f55af1d6131f33b554c98f8b929 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 14 Sep 2011 16:21:28 -0700 Subject: um: winch_interrupt() can happen inside of free_winch() ... so set winch->fd to -1 before doing free_irq(), to avoid having winch_interrupt() come from/during the latter and attempt to do reactivate_fd() on something that's already gone. Signed-off-by: Al Viro Signed-off-by: Richard Weinberger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/drivers/line.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'arch') diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index c5bff1ddeab..91bf18941ca 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -725,6 +725,8 @@ struct winch { static void free_winch(struct winch *winch, int free_irq_ok) { + int fd = winch->fd; + winch->fd = -1; if (free_irq_ok) free_irq(WINCH_IRQ, winch); @@ -732,8 +734,8 @@ static void free_winch(struct winch *winch, int free_irq_ok) if (winch->pid != -1) os_kill_process(winch->pid, 1); - if (winch->fd != -1) - os_close_file(winch->fd); + if (fd != -1) + os_close_file(fd); if (winch->stack != 0) free_stack(winch->stack, 0); kfree(winch); -- cgit v1.2.3