Command bytes are part of the written bytes and they should be taken into account when sending a spi transfer.
Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Daniel Schwierzeck daniel.schwierzeck@gmail.com --- v4: no changes v3: Fix bug introduced in v2: sizeof(cmd) vs len v2: Introduce changes requested by Simon Glass: - Always include command bytes when determining max write size.
drivers/mtd/spi/spi_flash.c | 2 +- include/spi.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 5ee33d8..1e194ce 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -380,7 +380,7 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
if (spi->max_write_size) chunk_len = min(chunk_len, - (size_t)spi->max_write_size); + spi->max_write_size - sizeof(cmd));
spi_flash_addr(write_addr, cmd);
diff --git a/include/spi.h b/include/spi.h index d0fa537..c4e1da6 100644 --- a/include/spi.h +++ b/include/spi.h @@ -89,7 +89,7 @@ struct dm_spi_slave_platdata { * @max_read_size: If non-zero, the maximum number of bytes which can * be read at once. * @max_write_size: If non-zero, the maximum number of bytes which can - * be written at once, excluding command bytes. + * be written at once. * @memory_map: Address of read-only SPI flash access. * @flags: Indication of SPI flags. */