spi: stm32h7: fix race condition at end of transfer
[ Upstream commit 135dd873d3
]
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>
Link: https://lore.kernel.org/r/1597043558-29668-2-git-send-email-alain.volmat@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -967,8 +967,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id)
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spin_unlock_irqrestore(&spi->lock, flags);
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if (end) {
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spi_finalize_current_transfer(master);
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stm32h7_spi_disable(spi);
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spi_finalize_current_transfer(master);
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}
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return IRQ_HANDLED;
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