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Subject[14/27] Staging: comedi: fix signal handling in read and write
2.6.32-longterm 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
@@ -1599,11 +1599,11 @@ 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) {
@@ -1706,11 +1706,11 @@ 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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