udl-kms: change down_interruptible to down
If we leave urbs around, it causes not only leak, but also memory corruption. This patch fixes the function udl_free_urb_list, so that it always waits for all urbs that are in progress. Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: NDave Airlie <airlied@redhat.com>
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