Merge branch 'spi-5.1' into spi-5.2 for stm32

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 93986f879b09..2be394d3bc59 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1039,6 +1039,8 @@ static int spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg)
                 if (max_tx || max_rx) {
                         list_for_each_entry(xfer, &msg->transfers,
                                             transfer_list) {
+                                if (!xfer->len)
+                                        continue;
                                 if (!xfer->tx_buf)
                                         xfer->tx_buf = ctlr->dummy_tx;
                                 if (!xfer->rx_buf)