Commit 4845187b authored Mar 30, 2010 by Jonathan Cameron Committed by Greg Kroah-Hartman Apr 30, 2010

staging: iio: ring_sw: Fix incorrect test on successful read of last value, causes infinite loop



This is a bad one. The test means that almost no reads of the last
value ever succeed!  Result is an infinite loop.

Another one for the 'oops' category.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent a8947fcf

drivers/staging/iio/ring_sw.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -293,7 +293,7 @@ again:
		return -EAGAIN;
		memcpy(data, last_written_p_copy, ring->buf.bpd);

		if (unlikely(ring->last_written_p >= last_written_p_copy))
		if (unlikely(ring->last_written_p != last_written_p_copy))
		goto again;

		iio_unmark_sw_rb_in_use(&ring->buf);