drivers: spi: consider command bytes when sending transfers
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>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index e40e1c0..294d9f9 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -405,7 +405,7 @@
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 4787454..5a7df1c 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -89,7 +89,7 @@
* @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.
*/