[PATCH 4.19 176/191] drm/panel: otm8009a: Set backlight parent to panel device

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From: James Cowgill <james.cowgill@xxxxxxxxxx>

commit ab4f869fba6119997f7630d600049762a2b014fa upstream.

This is the logical place to put the backlight device, and it also
fixes a kernel crash if the MIPI host is removed. Previously the
backlight device would be unregistered twice when this happened - once
as a child of the MIPI host through `mipi_dsi_host_unregister`, and
once when the panel device is destroyed.

Fixes: 12a6cbd4f3f1 ("drm/panel: otm8009a: Use new backlight API")
Signed-off-by: James Cowgill <james.cowgill@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230412173450.199592-1-james.cowgill@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/panel/panel-orisetech-otm8009a.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
+++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
@@ -454,7 +454,7 @@ static int otm8009a_probe(struct mipi_ds
 	ctx->panel.funcs = &otm8009a_drm_funcs;
 
 	ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev),
-						     dsi->host->dev, ctx,
+						     dev, ctx,
 						     &otm8009a_backlight_ops,
 						     NULL);
 	if (IS_ERR(ctx->bl_dev)) {





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