linux-kernel - [PATCH] drm/virtio: Remove redundant return type

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Message-Id: <20190503163804.31922-1-robert.foss@collabora.com>
Date:   Fri,  3 May 2019 18:38:04 +0200
From:   Robert Foss <robert.foss@...labora.com>
To:     airlied@...ux.ie, kraxel@...hat.com, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Chia-I Wu <olvaffe@...il.com>
Cc:     Robert Foss <robert.foss@...labora.com>,
        Emil Velikov <emil.velikov@...labora.com>
Subject: [PATCH] drm/virtio: Remove redundant return type

virtio_gpu_fence_emit() always returns 0, since it
has no error paths.

Consequently no calls for virtio_gpu_fence_emit()
use the return value, and it can be removed.

Signed-off-by: Robert Foss <robert.foss@...labora.com>
Suggested-by: Emil Velikov <emil.velikov@...labora.com>
---

This patch was suggested in this email thread:

[PATCH] drm/virtio: allocate fences with GFP_KERNEL
https://www.spinics.net/lists/dri-devel/msg208536.html

 drivers/gpu/drm/virtio/virtgpu_drv.h   | 2 +-
 drivers/gpu/drm/virtio/virtgpu_fence.c | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index d577cb76f5ad..9bc56887fbdb 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -334,7 +334,7 @@ int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);
 /* virtio_gpu_fence.c */
 struct virtio_gpu_fence *virtio_gpu_fence_alloc(
 	struct virtio_gpu_device *vgdev);
-int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
+void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 			  struct virtio_gpu_ctrl_hdr *cmd_hdr,
 			  struct virtio_gpu_fence *fence);
 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c b/drivers/gpu/drm/virtio/virtgpu_fence.c
index 21bd4c4a32d1..e0744ac768cc 100644
--- a/drivers/gpu/drm/virtio/virtgpu_fence.c
+++ b/drivers/gpu/drm/virtio/virtgpu_fence.c
@@ -81,7 +81,7 @@ struct virtio_gpu_fence *virtio_gpu_fence_alloc(struct virtio_gpu_device *vgdev)
 	return fence;
 }
 
-int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
+void virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 			  struct virtio_gpu_ctrl_hdr *cmd_hdr,
 			  struct virtio_gpu_fence *fence)
 {
@@ -96,7 +96,6 @@ int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 
 	cmd_hdr->flags |= cpu_to_le32(VIRTIO_GPU_FLAG_FENCE);
 	cmd_hdr->fence_id = cpu_to_le64(fence->seq);
-	return 0;
 }
 
 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vgdev,
-- 
2.20.1