linux-kernel - [RESEND Patch v3 18/20] media: ti-vpe: cal: Fix a WARN issued when start streaming fails

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Message-ID: <20191112145347.23519-19-bparrot@ti.com>
Date:   Tue, 12 Nov 2019 08:53:45 -0600
From:   Benoit Parrot <bparrot@...com>
To:     Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rob Herring <robh+dt@...nel.org>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Benoit Parrot <bparrot@...com>
Subject: [RESEND Patch v3 18/20] media: ti-vpe: cal: Fix a WARN issued when start streaming fails

When start_streaming fails after the buffers have been queued we have to
make sure all buffers are returned to user-space properly otherwise a
v4l2 level WARN is generated.

Signed-off-by: Benoit Parrot <bparrot@...com>
---
 drivers/media/platform/ti-vpe/cal.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 091119bee8fc..92a54d59d433 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -1695,10 +1695,15 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 	return 0;
 
 err:
+	spin_lock_irqsave(&ctx->slock, flags);
+	vb2_buffer_done(&ctx->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+	ctx->cur_frm = NULL;
+	ctx->next_frm = NULL;
 	list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
 		list_del(&buf->list);
 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
 	}
+	spin_unlock_irqrestore(&ctx->slock, flags);
 	return ret;
 }
 
-- 
2.17.1