Messages in this thread Patch in this message | | | Date | Thu, 18 Aug 2011 19:59:39 +0100 | Subject | Subject: [PATCH 04/91] um: winch_interrupt() can happen inside of free_winch() | From | Al Viro <> |
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... 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 <viro@zeniv.linux.org.uk> --- arch/um/drivers/line.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index c5bff1d..91bf1894 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); -- 1.7.2.5
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