Mesa (staging/19.1): winsys/drm: Fix out of scope variable usage

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Module: Mesa
Branch: staging/19.1
Commit: a5c864f6f89c076f612e187ee64ea30f69612e88
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a5c864f6f89c076f612e187ee64ea30f69612e88

Author: Deepak Rawat <drawat at vmware.com>
Date:   Wed Jun  5 10:46:47 2019 -0700

winsys/drm: Fix out of scope variable usage

In this particular instance, struct member were used outside of the
block where it was defined. Fix this by moving the definition outside of
block.

Signed-off-by: Deepak Rawat <drawat at vmware.com>
Fixes: 569f83898768 ("winsys/svga: Add support for new surface ioctl, multisample pattern")
Reviewed-by: Brian Paul <brianp at vmware.com>
(cherry picked from commit 828e1b0b4c5eef96a7f9a64010532263430e1f13)

---

 src/gallium/winsys/svga/drm/vmw_screen_ioctl.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
index 3b14f1d3513..e27d51013fb 100644
--- a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
+++ b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
@@ -210,6 +210,10 @@ vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
                             SVGA3dMSQualityLevel qualityLevel,
                             struct vmw_region **p_region)
 {
+   union {
+      union drm_vmw_gb_surface_create_ext_arg ext_arg;
+      union drm_vmw_gb_surface_create_arg arg;
+   } s_arg;
    struct drm_vmw_gb_surface_create_rep *rep;
    struct vmw_region *region = NULL;
    int ret;
@@ -222,12 +226,11 @@ vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
          return SVGA3D_INVALID_ID;
    }
 
-   if (vws->ioctl.have_drm_2_15) {
-      union drm_vmw_gb_surface_create_ext_arg s_arg;
-      struct drm_vmw_gb_surface_create_ext_req *req = &s_arg.req;
-      rep = &s_arg.rep;
+   memset(&s_arg, 0, sizeof(s_arg));
 
-      memset(&s_arg, 0, sizeof(s_arg));
+   if (vws->ioctl.have_drm_2_15) {
+      struct drm_vmw_gb_surface_create_ext_req *req = &s_arg.ext_arg.req;
+      rep = &s_arg.ext_arg.rep;
 
       req->version = drm_vmw_gb_surface_v1;
       req->multisample_pattern = multisamplePattern;
@@ -264,17 +267,15 @@ vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
          buffer_handle : SVGA3D_INVALID_ID;
 
       ret = drmCommandWriteRead(vws->ioctl.drm_fd,
-                                DRM_VMW_GB_SURFACE_CREATE_EXT, &s_arg,
-                                sizeof(s_arg));
+                                DRM_VMW_GB_SURFACE_CREATE_EXT, &s_arg.ext_arg,
+                                sizeof(s_arg.ext_arg));
 
       if (ret)
          goto out_fail_create;
    } else {
-      union drm_vmw_gb_surface_create_arg s_arg;
-      struct drm_vmw_gb_surface_create_req *req = &s_arg.req;
-      rep = &s_arg.rep;
+      struct drm_vmw_gb_surface_create_req *req = &s_arg.arg.req;
+      rep = &s_arg.arg.rep;
 
-      memset(&s_arg, 0, sizeof(s_arg));
       req->svga3d_flags = (uint32_t) flags;
       req->format = (uint32_t) format;
 
@@ -305,7 +306,7 @@ vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
          buffer_handle : SVGA3D_INVALID_ID;
 
       ret = drmCommandWriteRead(vws->ioctl.drm_fd, DRM_VMW_GB_SURFACE_CREATE,
-			        &s_arg, sizeof(s_arg));
+			        &s_arg.arg, sizeof(s_arg.arg));
 
       if (ret)
          goto out_fail_create;