[Bug 95045] Driver randomly hangs in sna_wait_vblank()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95045

--- Comment #1 from Mikołaj Siedlarek <mikolaj at siedlarek.pl> ---
Created attachment 123103
  --> https://bugs.freedesktop.org/attachment.cgi?id=123103&action=edit
trace from GDB

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