spi: stm32: always perform registers configuration prior to transfer

SPI registers content may have been lost upon suspend/resume sequence.
So, always compute and apply the necessary configuration in
stm32_spi_transfer_one_setup routine.
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Link: https://lore.kernel.org/r/1597043558-29668-6-git-send-email-alain.volmat@st.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-stm32.c

@@ -1597,18 +1597,14 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
 	unsigned long flags;
 	unsigned int comm_type;
 	int nb_words, ret = 0;
+	int mbr;
 
 	spin_lock_irqsave(&spi->lock, flags);
 
 	spi->cur_xferlen = transfer->len;
 
-	if (spi->cur_bpw != transfer->bits_per_word) {
 	spi->cur_bpw = transfer->bits_per_word;
 	spi->cfg->set_bpw(spi);
-	}
-
-	if (spi->cur_speed != transfer->speed_hz) {
-		int mbr;
 
 	/* Update spi->cur_speed with real clock speed */
 	mbr = stm32_spi_prepare_mbr(spi, transfer->speed_hz,
@@ -1621,17 +1617,13 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
 
 	transfer->speed_hz = spi->cur_speed;
 	stm32_spi_set_mbr(spi, mbr);
-	}
 
 	comm_type = stm32_spi_communication_type(spi_dev, transfer);
-	if (spi->cur_comm != comm_type) {
 	ret = spi->cfg->set_mode(spi, comm_type);
-
 	if (ret < 0)
 		goto out;
 
 	spi->cur_comm = comm_type;
-	}
 
 	if (spi->cfg->set_data_idleness)
 		spi->cfg->set_data_idleness(spi, transfer->len);