[PATCH 6.9 237/250] spi: stm32: qspi: Clamp stm32_qspi_get_mode() output to CCR_BUSWIDTH_4

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6.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>

commit 63deee52811b2f84ed2da55ad47252f0e8145d62 upstream.

In case usage of OCTAL mode, buswidth parameter can take the value 8.
As return value of stm32_qspi_get_mode() is used to configure fields
of CCR registers that are 2 bits only (fields IMODE, ADMODE, ADSIZE,
 DMODE), clamp return value of stm32_qspi_get_mode() to 4.

Fixes: a557fca630cc ("spi: stm32_qspi: Add transfer_one_message() spi callback")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
Link: https://msgid.link/r/20240618132951.2743935-3-patrice.chotard@xxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/spi/spi-stm32-qspi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -349,7 +349,7 @@ static int stm32_qspi_wait_poll_status(s
 
 static int stm32_qspi_get_mode(u8 buswidth)
 {
-	if (buswidth == 4)
+	if (buswidth >= 4)
 		return CCR_BUSWIDTH_4;
 
 	return buswidth;






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