trigger-user: arm on push only of all channels are ready

Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Federico Vaga <federico.vaga@gmail.com>

trigger-user: arm on push only of all channels are ready
Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Acked-by: Federico Vaga <federico.vaga@gmail.com>
0994f8c7 · Alessandro Rubini · Federico Vaga · 0ceb10aa · 0994f8c7
Commit 0994f8c7 authored Jan 20, 2013 by Alessandro Rubini Committed by Federico Vaga Jan 21, 2013
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zio-trig-user.c triggers/zio-trig-user.c +6 -0

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--- a/triggers/zio-trig-user.c
+++ b/triggers/zio-trig-user.c
@@ -41,10 +41,16 @@ static int ztu_push_block(struct zio_ti *ti, struct zio_channel *chan,
 			  struct zio_block *block)
 {
 	pr_debug("%s:%d\n", __func__, __LINE__);
+	struct zio_cset *cset = chan->cset;

 	if (chan->active_block)
 		return -EBUSY;
 	chan->active_block = block;
+
+	/* If all enabled channels are ready, tell hardware we are ready */
+	chan_for_each(chan, cset)
+		if (!chan->active_block)
+			return 0;
 	getnstimeofday(&ti->tstamp);
 	zio_arm_trigger(ti);
 	return 0;