mtd: nand: pxa3xx: Add a read/write buffers markers
In preparation to support multiple (aka chunked, aka splitted) page I/O, this commit adds 'data_buff_pos' and 'oob_buff_pos' fields to keep track of where the next read (or write) should be done. This will allow multiple calls to handle_data_pio() to continue the read (or write) operation. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Tested-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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