drm/msm/dsi: One function call less in dsi_init() after error detection

The dsi_destroy() function was called in two cases by the dsi_init() function
during error handling even if the passed variable contained a null pointer.

* This implementation detail could be improved by adjustments for jump
  targets according to the Linux coding style convention.

* Drop an unnecessary initialisation for the variable "msm_dsi" then.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[add couple missing ERR_PTR()'s]
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index dc4f38f..3d6ae79 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -74,19 +74,15 @@ static void dsi_destroy(struct msm_dsi *msm_dsi)
 
 static struct msm_dsi *dsi_init(struct platform_device *pdev)
 {
-       struct msm_dsi *msm_dsi = NULL;
+       struct msm_dsi *msm_dsi;
        int ret;
 
-       if (!pdev) {
-               ret = -ENXIO;
-               goto fail;
-       }
+       if (!pdev)
+               return ERR_PTR(-ENXIO);
 
        msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
-       if (!msm_dsi) {
-               ret = -ENOMEM;
-               goto fail;
-       }
+       if (!msm_dsi)
+               return ERR_PTR(-ENOMEM);
        DBG("dsi probed=%p", msm_dsi);
 
        msm_dsi->pdev = pdev;
@@ -95,21 +91,21 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev)
        /* Init dsi host */
        ret = msm_dsi_host_init(msm_dsi);
        if (ret)
-               goto fail;
+               goto destroy_dsi;
 
        /* GET dsi PHY */
        ret = dsi_get_phy(msm_dsi);
        if (ret)
-               goto fail;
+               goto destroy_dsi;
 
        /* Register to dsi manager */
        ret = msm_dsi_manager_register(msm_dsi);
        if (ret)
-               goto fail;
+               goto destroy_dsi;
 
        return msm_dsi;
 
-fail:
+destroy_dsi:
        dsi_destroy(msm_dsi);
        return ERR_PTR(ret);
 }