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SPITransferInPlace operation is unsound. #120

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@reitermarkus

Description

@reitermarkus

The implementation for theTransferInPlace operation violates the aliasing rule by creating an immutable reference from a mutable one, but keeping both.

SpiOperation::TransferInPlace(buf) =>{
let tx =unsafe{
let p = buf.as_ptr();
std::slice::from_raw_parts(p, buf.len())
};
transfers.push(SpidevTransfer::read_write(tx, buf));
}

There needs to be a corresponding method forSpidevTransfer, e.g.read_write_in_place.

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