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diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst
index 1d989c544370..bca1d9d1d223 100644
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+++ b/Documentation/media/kapi/cec-core.rst
@@ -268,6 +268,10 @@ to 1, if the hardware does support retry then either set these counters to
0 if the hardware provides no feedback of which errors occurred and how many
times, or fill in the correct values as reported by the hardware.
+Be aware that calling these functions can immediately start a new transmit
+if there is one pending in the queue. So make sure that the hardware is in
+a state where new transmits can be started *before* calling these functions.
+
The cec_transmit_attempt_done() function is a helper for cases where the
hardware never retries, so the transmit is always for just a single
attempt. It will call cec_transmit_done() in turn, filling in 1 for the