linux-kernel - [PATCH] 4.15 vmgfx boot warning

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Date:   Wed, 22 Nov 2017 16:05:50 -0500
From:   Woody Suwalski <terraluna977@...il.com>
To:     Sinclair Yeh <syeh@...are.com>
Cc:     DRI mailing list <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Dave Airlie <airlied@...ux.ie>
Subject: [PATCH] 4.15 vmgfx boot warning

The 4.15 vmwgfx driver shows a warning during boot (32 bit x86)
It is caused by a mismatch between the result of vmw_enable_vblank() and 
what the drm_atomic_helper expects:
    /...
    ret = drm_crtc_vblank_get(crtc);
    WARN_ONCE(ret != -EINVAL, "driver forgot to call 
drm_crtc_vblank_off()\n");
    /...

Signed-off by: Woody Suwalski <terraluna977@...il.com>

--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c    2017-11-22 
15:29:46.511674079 -0500
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c    2017-11-22 
15:30:35.344559592 -0500
@@ -1869,7 +1869,7 @@ u32 vmw_get_vblank_counter(struct drm_de
   */
  int vmw_enable_vblank(struct drm_device *dev, unsigned int pipe)
  {
-    return -ENOSYS;
+    return -EINVAL;
  }

  /**