[PATCH next] drm/panel: jdi-lpm102a188a: Fix error code in jdi_panel_prepare()

[Dan Carpenter <dan.carpenter@linaro.org>]

If the mipi_dsi_dual() macro fails, the error code is stored in
dsi_ctx.accum_err.  Propagate that error back to the caller instead
of returning success as the current code does.

Fixes: a6adf47d30cc ("drm/panel: jdi-lpm102a188a: Fix bug and clean up driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
 drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c b/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c
index 83656bb4b0b2..23462065d726 100644
--- a/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c
@@ -233,8 +233,10 @@ static int jdi_panel_prepare(struct drm_panel *panel)
 	mipi_dsi_dual(mipi_dsi_dcs_set_display_on_multi,
 		      &dsi_ctx, jdi->link1, jdi->link2);
 
-	if (dsi_ctx.accum_err < 0)
+	if (dsi_ctx.accum_err < 0) {
+		err = dsi_ctx.accum_err;
 		goto poweroff;
+	}
 
 	jdi->link1->mode_flags &= ~MIPI_DSI_MODE_LPM;
 	jdi->link2->mode_flags &= ~MIPI_DSI_MODE_LPM;
-- 
2.47.2