git.openwrt.org Git - openwrt/staging/blogic.git/blob

   1 From 628487eea01248eb722b46636a4b0fe45caaf24f Mon Sep 17 00:00:00 2001
   2 From: Colin Ian King <colin.king@canonical.com>
   3 Date: Fri, 8 Sep 2017 15:05:04 +0100
   4 Subject: [PATCH 173/454] drm/vc4: clean up error handling on devm_kzalloc
   5  failure
   6
   7 The current error handling when devm_kzalloc fails performs a
   8 non-null check on connector which is redundant because connector
   9 is null at that failure point.  Once this is removed, make the
  10 failure path into a trivial -ENOMEM return to clean up the
  11 error handling. Also remove need to initialize connector to NULL.
  12
  13 Detected by CoverityScan CID#1339527 ("Logically dead code")
  14 Signed-off-by: Colin Ian King <colin.king@canonical.com>
  15 Signed-off-by: Eric Anholt <eric@anholt.net>
  16 Reviewed-by: Eric Anholt <eric@anholt.net>
  17 Link: https://patchwork.freedesktop.org/patch/msgid/20170908140504.1340-1-colin.king@canonical.com
  18 (cherry picked from commit 5663077a56804890506c913b3ca9fee78764f8b3)
  19 ---
  20  drivers/gpu/drm/vc4/vc4_hdmi.c | 15 +++------------
  21  1 file changed, 3 insertions(+), 12 deletions(-)
  22
  23 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  24 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  25 @@ -309,16 +309,13 @@ static const struct drm_connector_helper
  26  static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
  27                                                      struct drm_encoder *encoder)
  28  {
  29 -       struct drm_connector *connector = NULL;
  30 +       struct drm_connector *connector;
  31         struct vc4_hdmi_connector *hdmi_connector;
  32 -       int ret = 0;
  33
  34         hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
  35                                       GFP_KERNEL);
  36 -       if (!hdmi_connector) {
  37 -               ret = -ENOMEM;
  38 -               goto fail;
  39 -       }
  40 +       if (!hdmi_connector)
  41 +               return ERR_PTR(-ENOMEM);
  42         connector = &hdmi_connector->base;
  43
  44         hdmi_connector->encoder = encoder;
  45 @@ -336,12 +333,6 @@ static struct drm_connector *vc4_hdmi_co
  46         drm_mode_connector_attach_encoder(connector, encoder);
  47
  48         return connector;
  49 -
  50 - fail:
  51 -       if (connector)
  52 -               vc4_hdmi_connector_destroy(connector);
  53 -
  54 -       return ERR_PTR(ret);
  55  }
  56
  57  static void vc4_hdmi_encoder_destroy(struct drm_encoder *encoder)