diff options
| -rw-r--r-- | drivers/spi/spi-stm32.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index a46132e81533..8e4db219b95d 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -1004,6 +1004,20 @@ static int stm32_spi_prepare_msg(struct spi_master *master, !!(spi_dev->mode & SPI_LSB_FIRST), !!(spi_dev->mode & SPI_CS_HIGH)); + /* On STM32H7, messages should not exceed a maximum size setted + * afterward via the set_number_of_data function. In order to + * ensure that, split large messages into several messages + */ + if (spi->cfg->set_number_of_data) { + int ret; + + ret = spi_split_transfers_maxsize(master, msg, + STM32H7_SPI_TSIZE_MAX, + GFP_KERNEL | GFP_DMA); + if (ret) + return ret; + } + spin_lock_irqsave(&spi->lock, flags); /* CPOL, CPHA and LSB FIRST bits have common register */ |