lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qcacld-3.0: fix wlan suspend fail after switch to non-dfs channel

Browse Source 
qcacld-2.0 to qcacld-3.0 propagation

In SAP DFS test, DUT can't goto suspend if SAP started
on DFS channel and later switched to non-dfs channel due to
Radar detected.
During SAP Starting, driver will acquire the wake lock
for dfs channel by hdd_hostapd_channel_prevent_suspend
in the eSAP_CHANNEL_CHANGE_EVENT event handler. But the SAP
is still in STOPPED state. We acquire the wake lock again
after SAP started in eSAP_START_BSS_EVENT event handler.
This causes driver to acquire wake lock twice for the
same dfs channel. And finally causes the device can't
suspend normally.
This change add check in eSAP_CHANNEL_CHANGE_EVENT
handler to only call hdd_hostapd_channel_prevent_suspend
when SAP is in started state to avoid lock/unlock mismatch.

Change-Id: Ief90697b7b6f19f6fcf0ab94f973a37e74ca3366
CRs-Fixed: 972657
This commit is contained in:
Liangwei Dong 2016-10-11 00:24:26 -04:00 committed by qcabuildsw
parent 4f2dedec3f
commit 5047d513ab
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
core/hdd/src/wlan_hdd_hostapd.c
View File

@ -1810,12 +1810,14 @@ QDF_STATUS hdd_hostapd_sap_event_cb(tpSap_Event pSapEvent,
case eSAP_CHANNEL_CHANGE_EVENT:
hdd_notice("Received eSAP_CHANNEL_CHANGE_EVENT event");
/* Prevent suspend for new channel */
hdd_hostapd_channel_prevent_suspend(pHostapdAdapter,
pSapEvent->sapevt.sap_ch_selected.pri_ch);
/* Allow suspend for old channel */
hdd_hostapd_channel_allow_suspend(pHostapdAdapter,
pHddApCtx->operatingChannel);
if (pHostapdState->bssState != BSS_STOP) {
/* Prevent suspend for new channel */
hdd_hostapd_channel_prevent_suspend(pHostapdAdapter,
pSapEvent->sapevt.sap_ch_selected.pri_ch);
/* Allow suspend for old channel */
hdd_hostapd_channel_allow_suspend(pHostapdAdapter,
pHddApCtx->operatingChannel);
}
/* SME/PE is already updated for new operation channel. So update
* HDD layer also here. This resolves issue in AP-AP mode where
* AP1 channel is changed due to RADAR then CAC is going on and