linux-kernel - [PATCH] drm/amdgpu: Replace kzalloc with kcalloc

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Date:   Mon, 14 Jan 2019 23:22:02 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] drm/amdgpu: Replace kzalloc with kcalloc

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@...eddedor.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