driver/spi: STM32 Revert while loop on tx only

This commit reverted while loop on tx only. This commit solves SPI loopback failure and SPI wrong behaviour on RX. fix: * #35297 * #35539 Revert "drivers/spi: STM32: This solves SPI infinite loop on Tranceive" This reverts commit 50c2acb. Signed-off-by: Affrin Pinhero <[email protected]>
zephyrproject-rtos · May 26, 2021 · c1daae6 · c1daae6
1 parent 3056c5e
commit c1daae6
Showing 1 changed file with 2 additions and 8 deletions.
diff --git a/drivers/spi/spi_ll_stm32.c b/drivers/spi/spi_ll_stm32.c
@@ -294,14 +294,8 @@ static void spi_stm32_shift_m(SPI_TypeDef *spi, struct spi_stm32_data *data)
  spi_context_update_tx(&data->ctx, 2, 1);
  }
 
- if (data->ctx.rx_buf) {
- while (!ll_func_rx_is_not_empty(spi)) {
- /* NOP */
- }
- } else {
- while (!ll_func_tx_is_empty(spi)) {
- /* NOP */
- }
+ while (!ll_func_rx_is_not_empty(spi)) {
+ /* NOP */
  }
 
  if (SPI_WORD_SIZE_GET(data->ctx.config->operation) == 8) {