Report overrun error only when it exceeds a given threshold.

Signed-off-by: Hugues Fruchet <hugues.fruc...@st.com>
---
 drivers/media/platform/stm32/stm32-dcmi.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c 
b/drivers/media/platform/stm32/stm32-dcmi.c
index 693415c..b63d57c 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -97,6 +97,8 @@ enum state {
 
 #define TIMEOUT_MS     1000
 
+#define OVERRUN_ERROR_THRESHOLD        3
+
 struct dcmi_graph_entity {
        struct device_node *node;
 
@@ -446,11 +448,13 @@ static irqreturn_t dcmi_irq_thread(int irq, void *arg)
 
        spin_lock_irq(&dcmi->irqlock);
 
-       if ((dcmi->misr & IT_OVR) || (dcmi->misr & IT_ERR)) {
-               dcmi->errors_count++;
-               if (dcmi->misr & IT_OVR)
-                       dcmi->overrun_count++;
+       if (dcmi->misr & IT_OVR) {
+               dcmi->overrun_count++;
+               if (dcmi->overrun_count > OVERRUN_ERROR_THRESHOLD)
+                       dcmi->errors_count++;
        }
+       if (dcmi->misr & IT_ERR)
+               dcmi->errors_count++;
 
        if (dcmi->sd_format->fourcc == V4L2_PIX_FMT_JPEG &&
            dcmi->misr & IT_FRAME) {
-- 
2.7.4

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