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ath10k: improve channel switching 

In some cases during heavy tx vdev stop-start
would timeout on vdev synchronization causing
traffic to stall for a few seconds.

Instead of stop-starting use a dedicated vdev
restart command and down vdevs explicitly before
doing so.

This gets rid of the synchronization
warnings/timeouts and makes channel switching
smoother during traffic.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2014-07-29 12:53:36 +03:00 committed by Kalle Valo
parent 76f5329a3d
commit dc55e3074c
1 changed files with 24 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/net/wireless/ath/ath10k/mac.c
View File

@ -796,7 +796,7 @@ static void ath10k_recalc_radar_detection(struct ath10k *ar)
}
}
static int ath10k_vdev_start(struct ath10k_vif *arvif)
static int ath10k_vdev_start_restart(struct ath10k_vif *arvif, bool restart)
{
struct ath10k *ar = arvif->ar;
struct cfg80211_chan_def *chandef = &ar->chandef;
@ -838,7 +838,11 @@ static int ath10k_vdev_start(struct ath10k_vif *arvif)
arg.vdev_id, arg.channel.freq,
ath10k_wmi_phymode_str(arg.channel.mode));
if (restart)
ret = ath10k_wmi_vdev_restart(ar, &arg);
else
ret = ath10k_wmi_vdev_start(ar, &arg);
if (ret) {
ath10k_warn("failed to start WMI vdev %i: %d\n",
arg.vdev_id, ret);
@ -858,6 +862,16 @@ static int ath10k_vdev_start(struct ath10k_vif *arvif)
return ret;
}
static int ath10k_vdev_start(struct ath10k_vif *arvif)
{
return ath10k_vdev_start_restart(arvif, false);
}
static int ath10k_vdev_restart(struct ath10k_vif *arvif)
{
return ath10k_vdev_start_restart(arvif, true);
}
static int ath10k_vdev_stop(struct ath10k_vif *arvif)
{
struct ath10k *ar = arvif->ar;
@ -2582,18 +2596,21 @@ static void ath10k_config_chan(struct ath10k *ar)
if (!arvif->is_started)
continue;
if (!arvif->is_up)
continue;
if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
continue;
ret = ath10k_vdev_stop(arvif);
ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id);
if (ret) {
ath10k_warn("failed to stop vdev %d: %d\n",
ath10k_warn("failed to down vdev %d: %d\n",
arvif->vdev_id, ret);
continue;
}
}
/* all vdevs are now stopped - now attempt to restart them */
/* all vdevs are downed now - attempt to restart and re-up them */
list_for_each_entry(arvif, &ar->arvifs, list) {
if (!arvif->is_started)
@ -2602,9 +2619,9 @@ static void ath10k_config_chan(struct ath10k *ar)
if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
continue;
ret = ath10k_vdev_start(arvif);
ret = ath10k_vdev_restart(arvif);
if (ret) {
ath10k_warn("failed to start vdev %d: %d\n",
ath10k_warn("failed to restart vdev %d: %d\n",
arvif->vdev_id, ret);
continue;
}