media: cec: core: remove length check of Timer Status

commit ce5d241c3ad4568c12842168288993234345c0eb upstream.

The valid_la is used to check the length requirements,
including special cases of Timer Status. If the length is
shorter than 5, that means no Duration Available is returned,
the message will be forced to be invalid.

However, the description of Duration Available in the spec
is that this parameter may be returned when these cases, or
that it can be optionally return when these cases. The key
words in the spec description are flexible choices.

Remove the special length check of Timer Status to fit the
spec which is not compulsory about that.

Signed-off-by: Nini Song <nini.song@mediatek.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c
index 99ede1417d72764e00a3a10de509b6d7691a2055..01ff1329e01c5063d82f517a407714ffa89b0856 100644 (file)
--- a/drivers/media/cec/core/cec-adap.c
+++ b/drivers/media/cec/core/cec-adap.c
@@ -1117,20 +1117,6 @@ void cec_received_msg_ts(struct cec_adapter *adap,
        if (valid_la && min_len) {
                /* These messages have special length requirements */
                switch (cmd) {
-               case CEC_MSG_TIMER_STATUS:
-                       if (msg->msg[2] & 0x10) {
-                               switch (msg->msg[2] & 0xf) {
-                               case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE:
-                               case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE:
-                                       if (msg->len < 5)
-                                               valid_la = false;
-                                       break;
-                               }
-                       } else if ((msg->msg[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE) {
-                               if (msg->len < 5)
-                                       valid_la = false;
-                       }
-                       break;
                case CEC_MSG_RECORD_ON:
                        switch (msg->msg[2]) {
                        case CEC_OP_RECORD_SRC_OWN: