touch:fts: fix touch driver issue when there is no panel connected

Follow the change of drm/drm_panel.c. of_drm_find_panel will
return ERR_PTR(-EPROBE_DEFER) instead of NULL when it fail to
find a matching panel.

Test: touch driver will exit if there is no panel connected.
Bug:146907583

Change-Id: Idd1692cacaf5f7084f0293fd6b0bbc3120941a73
Signed-off-by: davidycchen <davidycchen@google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fts.c b/fts.c
index b7169a2..757bd1f 100644
--- a/fts.c
+++ b/fts.c
@@ -5250,7 +5250,7 @@ static int parse_dt(struct device *dev, struct fts_hw_platform_data *bdata)
 				return -EPROBE_DEFER;
 			panel = of_drm_find_panel(panelmap.np);
 			of_node_put(panelmap.np);
-			if (panel) {
+			if (!IS_ERR_OR_NULL(panel)) {
 				bdata->panel = panel;
 				bdata->initial_panel_index = panelmap.args[0];
 				break;