Unverified Commit 6d7723e8 authored by Breno Leitao's avatar Breno Leitao Committed by Mark Brown
Browse files

spi: tegra210-quad: Protect curr_xfer clearing in tegra_qspi_non_combined_seq_xfer 



Protect the curr_xfer clearing in tegra_qspi_non_combined_seq_xfer()
with the spinlock to prevent a race with the interrupt handler that
reads this field to check if a transfer is in progress.

Fixes: b4e002d8 ("spi: tegra210-quad: Fix timeout handling")
Signed-off-by: default avatarBreno Leitao <leitao@debian.org>
Tested-by: default avatarJon Hunter <jonathanh@nvidia.com>
Acked-by: default avatarJon Hunter <jonathanh@nvidia.com>
Acked-by: default avatarThierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260126-tegra_xfer-v2-5-6d2115e4f387@debian.org


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bf4528ab

drivers/spi/spi-tegra210-quad.c

+3 −0
Original line number Diff line number Diff line
@@ -1288,6 +1288,7 @@ static int tegra_qspi_non_combined_seq_xfer(struct tegra_qspi *tqspi, 
	struct spi_transfer *transfer;

	bool is_first_msg = true;

	int ret = 0, val = 0;

	unsigned long flags;



	msg->status = 0;

	msg->actual_length = 0;
@@ -1368,7 +1369,9 @@ static int tegra_qspi_non_combined_seq_xfer(struct tegra_qspi *tqspi, 
		msg->actual_length += xfer->len + dummy_bytes;



complete_xfer:

		spin_lock_irqsave(&tqspi->lock, flags);

		tqspi->curr_xfer = NULL;

		spin_unlock_irqrestore(&tqspi->lock, flags);



		if (ret < 0) {

			tegra_qspi_transfer_end(spi);