| Message ID | 20220510150022.1787112-4-hverkuil-cisco@xs4all.nl |
|---|---|
| State | Accepted |
| Commit | 498946cf6b85b5eafb142132a11351814f578535 |
| Headers | show |
| Series | CEC framework fixes | expand |
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index e789aec7455c..b47280fa3b87 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -1709,9 +1709,10 @@ int __cec_s_log_addrs(struct cec_adapter *adap, return -ENODEV; if (!log_addrs || log_addrs->num_log_addrs == 0) { - if (!adap->is_configuring && !adap->is_configured) + if (!adap->log_addrs.num_log_addrs) return 0; - cec_adap_unconfigure(adap); + if (adap->is_configuring || adap->is_configured) + cec_adap_unconfigure(adap); adap->log_addrs.num_log_addrs = 0; for (i = 0; i < CEC_MAX_LOG_ADDRS; i++) adap->log_addrs.log_addr[i] = CEC_LOG_ADDR_INVALID;
The __cec_s_log_addrs() function can configure or unconfigure the adapter. The ioctl handler in cec-api.c will prevent it from being called to configure the adapter if it was already configured (or in the process of configuring). But it can still be called to unconfigure an already unconfigured adapter, and it didn't check for that. This can cause cec_activate_cnt_dec() to be called too often, causing a WARN_ON. Instead first check if adap->log_addrs.num_log_addrs == 0 and return since in that case the adapter is already unconfigured. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> --- drivers/media/cec/core/cec-adap.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)