Re: [PATCH] spi: stm32_qspi: Fix short data write operation

Hi,

On 5/24/21 12:24 AM, Daniil Stas wrote:

TCF flag only means that all data was sent to FIFO. To check if the data was sent out of FIFO we should also wait for the BUSY flag to be cleared. Otherwise there is a race condition which can lead to inability to write short (one byte long) data.

Signed-off-by: Daniil Stas daniil.stas@posteo.net Cc: Patrick Delaunay patrick.delaunay@foss.st.com Cc: Patrice Chotard patrice.chotard@foss.st.com

---

drivers/spi/stm32_qspi.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-)

Reviewed-by: Patrick Delaunay patrick.delaunay@foss.st.com

Thanks Patrick