OMAP: DSS2: OMAPFB: fix crash when panel driver was not loaded

If the panel's probe had failed, omapfb would still go on, eventually
crashing.

A better fix would be to handle each display properly, and leaving just
the failed display out. But that is a bigger change.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index e61a75c..d17caef 100644 (file)
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2115,6 +2115,11 @@ static int omapfb_probe(struct platform_device *pdev)
        dssdev = NULL;
        for_each_dss_dev(dssdev) {
                omap_dss_get_device(dssdev);
+               if (!dssdev->driver) {
+                       dev_err(&pdev->dev, "no driver for display\n");
+                       r = -EINVAL;
+                       goto cleanup;
+               }
                fbdev->displays[fbdev->num_displays++] = dssdev;
        }