[PATCH] drm/amdgpu: Replace kzalloc with kcalloc

[PATCH] drm/amdgpu: Replace kzalloc with kcalloc

[Gustavo A. R. Silva]

Replace kzalloc() function with its 2-factor argument form, kcalloc().

This patch replaces cases of:

	kzalloc(a * b, gfp)

with:
	kcalloc(a, b, gfp)

Also, improve the coding style and the use of sizeof during
allocation by changing sizeof(struct dc_surface_update) and
sizeof(struct dc_plane_state) to sizeof(*updates) and
sizeof(*surfaces), correspondingly.

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a3e65e457348..4c201de38329 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5782,11 +5782,14 @@ dm_determine_update_type_for_commit(struct dc *dc,
 	struct dm_crtc_state *new_dm_crtc_state, *old_dm_crtc_state;
 	struct dc_stream_status *status = NULL;
 
-	struct dc_surface_update *updates = kzalloc(MAX_SURFACES * sizeof(struct dc_surface_update), GFP_KERNEL);
-	struct dc_plane_state *surface = kzalloc(MAX_SURFACES * sizeof(struct dc_plane_state), GFP_KERNEL);
+	struct dc_surface_update *updates;
+	struct dc_plane_state *surface;
 	struct dc_stream_update stream_update;
 	enum surface_update_type update_type = UPDATE_TYPE_FAST;
 
+	updates = kcalloc(MAX_SURFACES, sizeof(*updates), GFP_KERNEL);
+	surface = kcalloc(MAX_SURFACES, sizeof(*surface), GFP_KERNEL);
+
 	if (!updates || !surface) {
 		DRM_ERROR("Plane or surface update failed to allocate");
 		/* Set type to FULL to avoid crashing in DC*/
-- 
2.20.1

Re: [PATCH] drm/amdgpu: Replace kzalloc with kcalloc

[Alex Deucher]

On Tue, Jan 15, 2019 at 2:58 AM Gustavo A. R. Silva
<gustavo@embeddedor.com> wrote:
>
> Replace kzalloc() function with its 2-factor argument form, kcalloc().
>
> This patch replaces cases of:
>
>         kzalloc(a * b, gfp)
>
> with:
>         kcalloc(a, b, gfp)
>
> Also, improve the coding style and the use of sizeof during
> allocation by changing sizeof(struct dc_surface_update) and
> sizeof(struct dc_plane_state) to sizeof(*updates) and
> sizeof(*surfaces), correspondingly.
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

Applied.  thanks!

Alex

> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index a3e65e457348..4c201de38329 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -5782,11 +5782,14 @@ dm_determine_update_type_for_commit(struct dc *dc,
>         struct dm_crtc_state *new_dm_crtc_state, *old_dm_crtc_state;
>         struct dc_stream_status *status = NULL;
>
> -       struct dc_surface_update *updates = kzalloc(MAX_SURFACES * sizeof(struct dc_surface_update), GFP_KERNEL);
> -       struct dc_plane_state *surface = kzalloc(MAX_SURFACES * sizeof(struct dc_plane_state), GFP_KERNEL);
> +       struct dc_surface_update *updates;
> +       struct dc_plane_state *surface;
>         struct dc_stream_update stream_update;
>         enum surface_update_type update_type = UPDATE_TYPE_FAST;
>
> +       updates = kcalloc(MAX_SURFACES, sizeof(*updates), GFP_KERNEL);
> +       surface = kcalloc(MAX_SURFACES, sizeof(*surface), GFP_KERNEL);
> +
>         if (!updates || !surface) {
>                 DRM_ERROR("Plane or surface update failed to allocate");
>                 /* Set type to FULL to avoid crashing in DC*/
> --
> 2.20.1
>
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