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[media] cec: initiator should be the same as the destination for, poll 

Poll messages that are used to allocate a logical address should
use the same initiator as the destination. Instead, it expected that
the initiator was 0xf which is not according to the standard.

This also had consequences for the message checks in cec_transmit_msg_fh
that incorrectly rejected poll messages with the same initiator and
destination.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2017-02-11 09:24:46 -02:00 committed by Mauro Carvalho Chehab
parent 35879ee476
commit 42980da2eb
1 changed files with 3 additions and 4 deletions
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7
drivers/media/cec/cec-adap.c
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@ -612,8 +612,7 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
}
memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
if (msg->len == 1) {
if (cec_msg_initiator(msg) != 0xf ||
cec_msg_destination(msg) == 0xf) {
if (cec_msg_destination(msg) == 0xf) {
dprintk(1, "cec_transmit_msg: invalid poll message\n");
return -EINVAL;
}
@ -638,7 +637,7 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
dprintk(1, "cec_transmit_msg: destination is the adapter itself\n");
return -EINVAL;
}
if (cec_msg_initiator(msg) != 0xf &&
if (msg->len > 1 && adap->is_configured &&
!cec_has_log_addr(adap, cec_msg_initiator(msg))) {
dprintk(1, "cec_transmit_msg: initiator has unknown logical address %d\n",
cec_msg_initiator(msg));
@ -1072,7 +1071,7 @@ static int cec_config_log_addr(struct cec_adapter *adap,
/* Send poll message */
msg.len = 1;
msg.msg[0] = 0xf0 | log_addr;
msg.msg[0] = (log_addr << 4) | log_addr;
err = cec_transmit_msg_fh(adap, &msg, NULL, true);
/*