modesetting: handle NULL cursor in drmmode_set_cursor.
We had a bug reported with a touchscreen where we could end up in here with a NULL cursor, so let's not crash the X server. Signed-off-by: Dave Airlie <airlied@redhat.com> Reviewed-and-Tested-by: Daniel Martin <consume.noise@gmail.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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@ -759,6 +759,9 @@ drmmode_set_cursor(xf86CrtcPtr crtc)
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CursorPtr cursor = xf86CurrentCursor(crtc->scrn->pScreen);
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int ret = -EINVAL;
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if (cursor == NullCursor)
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return TRUE;
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ret = drmModeSetCursor2(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
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handle, ms->cursor_width, ms->cursor_height,
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cursor->bits->xhot, cursor->bits->yhot);
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