drm/vmgfx: kill off unused init_mutex

According to the docs - prevents firstopen/lastclose races. Yet never
used in practise.

Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190522164119.24139-2-emil.l.velikov@gmail.com

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 45d7fc7..fe0a679 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -641,7 +641,6 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
                INIT_LIST_HEAD(&dev_priv->res_lru[i]);
        }
 
-       mutex_init(&dev_priv->init_mutex);
        init_waitqueue_head(&dev_priv->fence_queue);
        init_waitqueue_head(&dev_priv->fifo_queue);
        dev_priv->fence_queue_waiters = 0;

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 366dcfc..0bf13d3 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -484,11 +484,6 @@ struct vmw_private {
 
        spinlock_t resource_lock;
        struct idr res_idr[vmw_res_max];
-       /*
-        * Block lastclose from racing with firstopen.
-        */
-
-       struct mutex init_mutex;
 
        /*
         * A resource manager for kernel-only surfaces and