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The code waiting for fifo idle was incorrect and could possibly spin forever under certain circumstances. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reported-by: Mark Sheldon <markshel@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com> Reivewed-by: Mark Sheldon <markshel@vmware.com> Cc: <stable@vger.kernel.org>