diff mbox series

[v2,1/5] spi: stm32h7: fix race condition at end of transfer

Message ID 1597043558-29668-2-git-send-email-alain.volmat@st.com (mailing list archive)
State New, archived
Headers show
Series spi: stm32: various driver fixes | expand

Commit Message

Alain Volmat Aug. 10, 2020, 7:12 a.m. UTC 
From: Antonio Borneo <antonio.borneo@st.com>

The caller of stm32_spi_transfer_one(), spi_transfer_one_message(),
is waiting for us to call spi_finalize_current_transfer() and will
eventually schedule a new transfer, if available.
We should guarantee that the spi controller is really available
before calling spi_finalize_current_transfer().

Move the call to spi_finalize_current_transfer() _after_ the call
to stm32_spi_disable().

Signed-off-by: Antonio Borneo <antonio.borneo@st.com>
Signed-off-by: Alain Volmat <alain.volmat@st.com>
---
v2: identical to v1

 drivers/spi/spi-stm32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 4a21feae0103..814a3ec3b8ad 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -971,8 +971,8 @@  static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id)
 	spin_unlock_irqrestore(&spi->lock, flags);
 
 	if (end) {
-		spi_finalize_current_transfer(master);
 		stm32h7_spi_disable(spi);
+		spi_finalize_current_transfer(master);
 	}
 
 	return IRQ_HANDLED;