[Intel-gfx] [PATCH] drm/i915: Fix plane init failure paths
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Apr 1 20:31:13 UTC 2016
On Mon, Mar 21, 2016 at 02:43:22PM +0000, Matthew Auld wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Deal with errors from drm_universal_plane_init() in primary and cursor
> plane init paths (sprites were already covered). Also make the code
> neater by using goto for error handling.
>
> v2: Rebased due to drm_universal_plane_init() 'name' parameter
> v3: Another rebase due to s/""/NULL/
> v4: Rebased on drm-nightly (Matthew Auld)
> v5: Fix email address (Matthew Auld)
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Pushed to dinq. Thanks for the review.
> ---
> drivers/gpu/drm/i915/intel_display.c | 64 ++++++++++++++++++++++--------------
> drivers/gpu/drm/i915/intel_sprite.c | 34 +++++++++++--------
> 2 files changed, 60 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 74b0165..f3f6fd1 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -13961,20 +13961,19 @@ const struct drm_plane_funcs intel_plane_funcs = {
> static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> int pipe)
> {
> - struct intel_plane *primary;
> - struct intel_plane_state *state;
> + struct intel_plane *primary = NULL;
> + struct intel_plane_state *state = NULL;
> const uint32_t *intel_primary_formats;
> unsigned int num_formats;
> + int ret;
>
> primary = kzalloc(sizeof(*primary), GFP_KERNEL);
> - if (primary == NULL)
> - return NULL;
> + if (!primary)
> + goto fail;
>
> state = intel_create_plane_state(&primary->base);
> - if (!state) {
> - kfree(primary);
> - return NULL;
> - }
> + if (!state)
> + goto fail;
> primary->base.state = &state->base;
>
> primary->can_scale = false;
> @@ -14016,10 +14015,12 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> primary->disable_plane = i9xx_disable_primary_plane;
> }
>
> - drm_universal_plane_init(dev, &primary->base, 0,
> - &intel_plane_funcs,
> - intel_primary_formats, num_formats,
> - DRM_PLANE_TYPE_PRIMARY, NULL);
> + ret = drm_universal_plane_init(dev, &primary->base, 0,
> + &intel_plane_funcs,
> + intel_primary_formats, num_formats,
> + DRM_PLANE_TYPE_PRIMARY, NULL);
> + if (ret)
> + goto fail;
>
> if (INTEL_INFO(dev)->gen >= 4)
> intel_create_rotation_property(dev, primary);
> @@ -14027,6 +14028,12 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> drm_plane_helper_add(&primary->base, &intel_plane_helper_funcs);
>
> return &primary->base;
> +
> +fail:
> + kfree(state);
> + kfree(primary);
> +
> + return NULL;
> }
>
> void intel_create_rotation_property(struct drm_device *dev, struct intel_plane *plane)
> @@ -14143,18 +14150,17 @@ intel_update_cursor_plane(struct drm_plane *plane,
> static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
> int pipe)
> {
> - struct intel_plane *cursor;
> - struct intel_plane_state *state;
> + struct intel_plane *cursor = NULL;
> + struct intel_plane_state *state = NULL;
> + int ret;
>
> cursor = kzalloc(sizeof(*cursor), GFP_KERNEL);
> - if (cursor == NULL)
> - return NULL;
> + if (!cursor)
> + goto fail;
>
> state = intel_create_plane_state(&cursor->base);
> - if (!state) {
> - kfree(cursor);
> - return NULL;
> - }
> + if (!state)
> + goto fail;
> cursor->base.state = &state->base;
>
> cursor->can_scale = false;
> @@ -14166,11 +14172,13 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
> cursor->update_plane = intel_update_cursor_plane;
> cursor->disable_plane = intel_disable_cursor_plane;
>
> - drm_universal_plane_init(dev, &cursor->base, 0,
> - &intel_plane_funcs,
> - intel_cursor_formats,
> - ARRAY_SIZE(intel_cursor_formats),
> - DRM_PLANE_TYPE_CURSOR, NULL);
> + ret = drm_universal_plane_init(dev, &cursor->base, 0,
> + &intel_plane_funcs,
> + intel_cursor_formats,
> + ARRAY_SIZE(intel_cursor_formats),
> + DRM_PLANE_TYPE_CURSOR, NULL);
> + if (ret)
> + goto fail;
>
> if (INTEL_INFO(dev)->gen >= 4) {
> if (!dev->mode_config.rotation_property)
> @@ -14190,6 +14198,12 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
> drm_plane_helper_add(&cursor->base, &intel_plane_helper_funcs);
>
> return &cursor->base;
> +
> +fail:
> + kfree(state);
> + kfree(cursor);
> +
> + return NULL;
> }
>
> static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_crtc,
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 8821533..0f3e230 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1025,8 +1025,8 @@ static uint32_t skl_plane_formats[] = {
> int
> intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
> {
> - struct intel_plane *intel_plane;
> - struct intel_plane_state *state;
> + struct intel_plane *intel_plane = NULL;
> + struct intel_plane_state *state = NULL;
> unsigned long possible_crtcs;
> const uint32_t *plane_formats;
> int num_plane_formats;
> @@ -1036,13 +1036,15 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
> return -ENODEV;
>
> intel_plane = kzalloc(sizeof(*intel_plane), GFP_KERNEL);
> - if (!intel_plane)
> - return -ENOMEM;
> + if (!intel_plane) {
> + ret = -ENOMEM;
> + goto fail;
> + }
>
> state = intel_create_plane_state(&intel_plane->base);
> if (!state) {
> - kfree(intel_plane);
> - return -ENOMEM;
> + ret = -ENOMEM;
> + goto fail;
> }
> intel_plane->base.state = &state->base;
>
> @@ -1097,28 +1099,34 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
> num_plane_formats = ARRAY_SIZE(skl_plane_formats);
> break;
> default:
> - kfree(intel_plane);
> - return -ENODEV;
> + MISSING_CASE(INTEL_INFO(dev)->gen);
> + ret = -ENODEV;
> + goto fail;
> }
>
> intel_plane->pipe = pipe;
> intel_plane->plane = plane;
> intel_plane->frontbuffer_bit = INTEL_FRONTBUFFER_SPRITE(pipe, plane);
> intel_plane->check_plane = intel_check_sprite_plane;
> +
> possible_crtcs = (1 << pipe);
> +
> ret = drm_universal_plane_init(dev, &intel_plane->base, possible_crtcs,
> &intel_plane_funcs,
> plane_formats, num_plane_formats,
> DRM_PLANE_TYPE_OVERLAY, NULL);
> - if (ret) {
> - kfree(intel_plane);
> - goto out;
> - }
> + if (ret)
> + goto fail;
>
> intel_create_rotation_property(dev, intel_plane);
>
> drm_plane_helper_add(&intel_plane->base, &intel_plane_helper_funcs);
>
> -out:
> + return 0;
> +
> +fail:
> + kfree(state);
> + kfree(intel_plane);
> +
> return ret;
> }
> --
> 2.4.3
--
Ville Syrjälä
Intel OTC
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