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disp: msm: dp: destroy audio workqueue outside session_lock

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Change moves destroying dp audio workqueue outside dp session_lock.
As part of disconnect, USB driver uses atomic notifier which holds
rcu_read_lock and calls into DP disconnect callback which needs
session_lock. If another DP threads holds DP session_lock then
we block RCU operations.

Change-Id: I5d565ca149a3a34ebd5ede4fb662982d87454f16
Signed-off-by: Vara Reddy <quic_varar@quicinc.com>
This commit is contained in:
Vara Reddy
2022-07-22 12:01:20 -07:00
committed by Gerrit - the friendly Code Review server
parent fd732177c1
commit df69a7d379
1 changed files with 6 additions and 1 deletions
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7
msm/dp/dp_display.c
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@@ -3347,6 +3347,7 @@ static int dp_display_mst_connector_uninstall(struct dp_display *dp_display,
struct sde_connector *sde_conn;
struct dp_panel *dp_panel;
struct dp_display_private *dp;
struct dp_audio *audio = NULL;
if (!dp_display || !connector) {
DP_ERR("invalid input\n");
@@ -3372,13 +3373,17 @@ static int dp_display_mst_connector_uninstall(struct dp_display *dp_display,
}
dp_panel = sde_conn->drv_panel;
dp_audio_put(dp_panel->audio);
/* Make a copy of audio structure to call into dp_audio_put later */
audio = dp_panel->audio;
dp_panel_put(dp_panel);
DP_MST_DEBUG("dp mst connector uninstalled. conn:%d\n",
connector->base.id);
mutex_unlock(&dp->session_lock);
dp_audio_put(audio);
SDE_EVT32_EXTERNAL(SDE_EVTLOG_FUNC_EXIT, dp->state);
return rc;