1e5613b4a6
Make sure to allocate the message transfer-buffer separately from the containing message structure to avoid data corruption on systems without DMA-coherent caches. The message structure contains state that is updated while the buffer may be used for DMA, something which could lead to data corruption due to cache-line sharing on some architectures. Use the (renamed) message cache for the message structure itself and allocate the buffer separately. If the additional allocation is a concern, the message structures could eventually be allocated as part of the operation structure. Signed-off-by: Johan Hovold <johan@hovoldconsulting.com> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>