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PM / devfreq: rockchip-dmc: fix bug of get lcdc type deadlock

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When lcdc status changing and ddr frequency changing at the same time,
it may deadlock. Use list_for_each_entry to avoid this bug.

Change-Id: I8074dc60b71650ea1afc300282f90ae8ff1ae97b
Signed-off-by: Tang Yun ping <typ@rock-chips.com>
This commit is contained in:
Tang Yun ping
2017-09-11 10:12:47 +08:00
committed by Huang, Tao
parent 3565b1e7e8
commit df885baaac
1 changed files with 2 additions and 3 deletions
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5
drivers/devfreq/rockchip_dmc.c
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@@ -691,14 +691,13 @@ static int rk_drm_get_lcdc_type(void)
if (drm) {
struct drm_connector *conn;
drm_modeset_lock(&drm->mode_config.connection_mutex, NULL);
drm_for_each_connector(conn, drm) {
list_for_each_entry(conn, &drm->mode_config.connector_list,
head) {
if (conn->encoder) {
lcdc_type = conn->connector_type;
break;
}
}
drm_modeset_unlock(&drm->mode_config.connection_mutex);
}
switch (lcdc_type) {
case DRM_MODE_CONNECTOR_LVDS: