media: stm32-dcmi: do not fall into error on buffer starvation

Return silently instead of falling into error when running
out of available buffers when restarting capture.
Capture will be restarted when new buffers will be
provided by V4L2 client.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index b78583dc972b11474c2d1dbe12707fd58c69cada..fc72a57d84782e0df51e0cf3b4ece71838626ef3 100644 (file)
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -227,13 +227,10 @@ static int dcmi_restart_capture(struct stm32_dcmi *dcmi)
 
        /* Restart a new DMA transfer with next buffer */
        if (list_empty(&dcmi->buffers)) {
-               dev_err(dcmi->dev, "%s: No more buffer queued, cannot capture buffer\n",
-                       __func__);
-               dcmi->errors_count++;
+               dev_dbg(dcmi->dev, "Capture restart is deferred to next buffer queueing\n");
                dcmi->active = NULL;
-
                spin_unlock_irq(&dcmi->irqlock);
-               return -EINVAL;
+               return 0;
        }
 
        dcmi->active = list_entry(dcmi->buffers.next,