omapfb: dss: Handle return errors in dss_init_ports()

dss_init_ports() is not handling return errors from dpi_init_port() and
sdi_init_port(). It is also always returning 0 currently which results in
part of error handling code in dss_bind() being unused.

Fix dss_init_ports() to handle return errors from dpi_init_port() and
sdi_init_port().

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: tomi.valkeinen@ti.com
[b.zolnierkie: fail early on errors, minor fixups]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

1 files changed, 11 insertions, 5 deletions

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
index 47d7f69ad9ad..48c6500c24e1 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
@@ -941,11 +941,13 @@ static int dss_init_features(struct platform_device *pdev)
         return 0;
 }
 
+static void dss_uninit_ports(struct platform_device *pdev);
+
 static int dss_init_ports(struct platform_device *pdev)
 {
         struct device_node *parent = pdev->dev.of_node;
         struct device_node *port;
-        int r;
+        int r, ret = 0;
 
         if (parent == NULL)
                 return 0;
@@ -972,17 +974,21 @@ static int dss_init_ports(struct platform_device *pdev)
 
                 switch (port_type) {
                 case OMAP_DISPLAY_TYPE_DPI:
-                        dpi_init_port(pdev, port);
+                        ret = dpi_init_port(pdev, port);
                         break;
                 case OMAP_DISPLAY_TYPE_SDI:
-                        sdi_init_port(pdev, port);
+                        ret = sdi_init_port(pdev, port);
                         break;
                 default:
                         break;
                 }
-        } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
+        } while (!ret &&
+                 (port = omapdss_of_get_next_port(parent, port)) != NULL);
 
-        return 0;
+        if (ret)
+                dss_uninit_ports(pdev);
+
+        return ret;
 }
 
 static void dss_uninit_ports(struct platform_device *pdev)