Messages in this thread Patch in this message |  | | | Date | Wed, 07 Dec 2011 08:12:09 -0800 | | From | Greg KH <> | | Subject | [067/104] Staging: comedi: fix signal handling in read and write |
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3.1-stable review patch. If anyone has any objections, please let me know.
------------------ From: Federico Vaga <federico.vaga@gmail.com>
commit 6a9ce6b654e491981f6ef7e214cbd4f63e033848 upstream.
After sleeping on a wait queue, signal_pending(current) should be checked (not before sleeping).
Acked-by: Alessandro Rubini <rubini@gnudd.com> Signed-off-by: Federico Vaga <federico.vaga@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/staging/comedi/comedi_fops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -1673,11 +1673,11 @@ static ssize_t comedi_write(struct file retval = -EAGAIN; break; } + schedule(); if (signal_pending(current)) { retval = -ERESTARTSYS; break; } - schedule(); if (!s->busy) break; if (s->busy != file) { @@ -1780,11 +1780,11 @@ static ssize_t comedi_read(struct file * retval = -EAGAIN; break; } + schedule(); if (signal_pending(current)) { retval = -ERESTARTSYS; break; } - schedule(); if (!s->busy) { retval = 0; break;
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