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[media] cec: return -EPERM when no LAs are configured 

The CEC_TRANSMIT ioctl now returns -EPERM if an attempt is made to
transmit a message for an unconfigured adapter (i.e. userspace
never called CEC_ADAP_S_LOG_ADDRS).

This differentiates this case from when LAs are configured, but no
physical address is set. In that case -ENONET is returned.

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 2017-02-27 09:18:35 -03:00 committed by Mauro Carvalho Chehab
parent 533a3f7bc7
commit 059d1460ca
1 changed files with 3 additions and 1 deletions
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4
drivers/media/cec/cec-api.c
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@ -198,7 +198,9 @@ static long cec_transmit(struct cec_adapter *adap, struct cec_fh *fh,
return -EINVAL;
mutex_lock(&adap->lock);
if (adap->is_configuring)
if (adap->log_addrs.num_log_addrs == 0)
err = -EPERM;
else if (adap->is_configuring)
err = -ENONET;
else if (!adap->is_configured && (msg.msg[0] != 0xf0 || msg.reply))
err = -ENONET;