Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20150611-1' into staging

spice: fix segfault in qemu_spice_create_update, ui_info tweaks.

# gpg: Signature made Thu Jun 11 08:48:49 2015 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/spice/tags/pull-spice-20150611-1:
  spice: ui_info tweaks
  spice-display: fix segfault in qemu_spice_create_update
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

ui/spice-display.c

@@ -199,7 +199,7 @@ static void qemu_spice_create_update(SimpleSpiceDisplay *ssd)
     static const int blksize = 32;
     int blocks = (surface_width(ssd->ds) + blksize - 1) / blksize;
     int dirty_top[blocks];
-    int y, yoff, x, xoff, blk, bw;
+    int y, yoff1, yoff2, x, xoff, blk, bw;
     int bpp = surface_bytes_per_pixel(ssd->ds);
     uint8_t *guest, *mirror;
 
@@ -214,13 +214,14 @@ static void qemu_spice_create_update(SimpleSpiceDisplay *ssd)
     guest = surface_data(ssd->ds);
     mirror = (void *)pixman_image_get_data(ssd->mirror);
     for (y = ssd->dirty.top; y < ssd->dirty.bottom; y++) {
-        yoff = y * surface_stride(ssd->ds);
+        yoff1 = y * surface_stride(ssd->ds);
+        yoff2 = y * pixman_image_get_stride(ssd->mirror);
         for (x = ssd->dirty.left; x < ssd->dirty.right; x += blksize) {
             xoff = x * bpp;
             blk = x / blksize;
             bw = MIN(blksize, ssd->dirty.right - x);
-            if (memcmp(guest + yoff + xoff,
-                       mirror + yoff + xoff,
+            if (memcmp(guest + yoff1 + xoff,
+                       mirror + yoff2 + xoff,
                        bw * bpp) == 0) {
                 if (dirty_top[blk] != -1) {
                     QXLRect update = {
@@ -660,7 +661,10 @@ static int interface_client_monitors_config(QXLInstance *sin,
 {
     SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
     QemuUIInfo info;
-    int rc;
+
+    if (!dpy_ui_info_supported(ssd->dcl.con)) {
+        return 0; /* == not supported by guest */
+    }
 
     if (!mc) {
         return 1;
@@ -675,14 +679,10 @@ static int interface_client_monitors_config(QXLInstance *sin,
         info.width  = mc->monitors[0].width;
         info.height = mc->monitors[0].height;
     }
-    rc = dpy_set_ui_info(ssd->dcl.con, &info);
-    dprint(1, "%s/%d: size %dx%d, rc %d   <---   ==========================\n",
-           __func__, ssd->qxl.id, info.width, info.height, rc);
-    if (rc != 0) {
-        return 0; /* == not supported by guest */
-    } else {
-        return 1;
-    }
+    dpy_set_ui_info(ssd->dcl.con, &info);
+    dprint(1, "%s/%d: size %dx%d\n", __func__, ssd->qxl.id,
+           info.width, info.height);
+    return 1;
 }
 
 static const QXLInterface dpy_interface = {