spi: stm32: Revert "properly handle 0 byte transfer"

0 byte transfer handling is now done within the core in code added
by commit e1b6ca8d46f2 ("spi: Skip zero-length transfers in spi_transfer_one_message()")

This reverts commit 396cf079400a ("spi: stm32: properly handle 0 byte transfer")

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Link: https://lore.kernel.org/r/1625646426-5826-5-git-send-email-alain.volmat@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 4dbd5cbe0c117b730fcaa1e779e984261a64e846..d37bfead4d8cd96f199a3b64660f3ff55eaaa920 100644 (file)
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1647,10 +1647,6 @@ static int stm32_spi_transfer_one(struct spi_master *master,
        struct stm32_spi *spi = spi_master_get_devdata(master);
        int ret;
 
-       /* Don't do anything on 0 bytes transfers */
-       if (transfer->len == 0)
-               return 0;
-
        spi->tx_buf = transfer->tx_buf;
        spi->rx_buf = transfer->rx_buf;
        spi->tx_len = spi->tx_buf ? transfer->len : 0;