[PATCH AUTOSEL 5.4 10/38] spi: stm32h7: fix race condition at end of transfer
From: Sasha Levin <sashal@kernel.org>
Date: 2020-08-24 17:06:14
Also in:
linux-spi, lkml, stable
Subsystem:
spi subsystem, st stm32 spi driver, the rest · Maintainers:
Mark Brown, Alain Volmat, Linus Torvalds
From: Antonio Borneo <redacted> [ Upstream commit 135dd873d3c76d812ae64c668adef3f2c59ed27f ] 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 <redacted> Signed-off-by: Alain Volmat <redacted> Link: https://lore.kernel.org/r/1597043558-29668-2-git-send-email-alain.volmat@st.com (local) Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/spi/spi-stm32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index db4c1584327c1..cb54471456145 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c@@ -966,8 +966,8 @@ 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;
--
2.25.1
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