USB: opticon: fix non-atomic allocation in write path
Write may be called from interrupt context so make sure to use GFP_ATOMIC for all allocations in write. Fixes: 0d930e51 ("USB: opticon: Add Opticon OPN2001 write support") Cc: stable <stable@vger.kernel.org> Signed-off-by:Johan Hovold <johan@kernel.org>
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