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Fri, 16 Jan 2026 02:42:02 -0800 (PST) From: Breno Leitao Date: Fri, 16 Jan 2026 02:41:45 -0800 Subject: [PATCH 5/6] spi: tegra210-quad: Protect curr_xfer clearing in tegra_qspi_non_combined_seq_xfer Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260116-tegra_xfer-v1-5-02d96c790619@debian.org> References: <20260116-tegra_xfer-v1-0-02d96c790619@debian.org> In-Reply-To: <20260116-tegra_xfer-v1-0-02d96c790619@debian.org> To: Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Laxman Dewangan , Mark Brown , Vishwaroop A Cc: Thierry Reding , linux-tegra@vger.kernel.org, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, Breno Leitao , kernel-team@meta.com, puranjay@kernel.org, usamaarif642@gmail.com X-Mailer: b4 0.15-dev-47773 X-Developer-Signature: v=1; a=openpgp-sha256; l=1208; i=leitao@debian.org; h=from:subject:message-id; bh=rXTI3sY64hoG5V6aBH3z2wkNQ6wZUnODcq5kb+6G3tU=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBpahXyKDqDLy9UiFdHIdAnuTY95cnWgrnwOfWdb X+yE3bypBGJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaWoV8gAKCRA1o5Of/Hh3 bfe4EACtv6gkekdzoWC0uBpx8BTg11Qj2SxS+lMOa/KXjIBBZrx9Vq4YfUrFK0WRGupFU9VAA+6 E3rQLJ14PsLpEjBxO1imfKO4yNi6A10oCPKAmL9Svk5VgvPx3KbMcuc9dg8iPCW8aJjdg0rMj9b sEyWXfoa1kIfUGqpSQ5ZyVbZ7qTl8ZBCOL8WRumWVda+QCYWQph8iFVVRoknhyejv1nx/KNbLua yWAef/c6s8JdwA49o5TsD66LhOwDCTAw3B1zu0pgPbwJGd3BcY0DSsikVFs1UyyLl2jASseYPN6 A4VK8cpfci1rSIuXS7V57N0PRhcv4Jno8K06oZP59OqbFHCD+Q7lkGwBP+ojf+R46fmJChCywdZ pLCYs64ioYh3CDNl6usNLABSMxF4U2x6ut4JX0zUECdzRowk4hB5ibbBSgzixZHXHcY5l1g2/Xj waIXTFR6d20JspOHFu8qWBt93haW9vac8wrgm22s5oey13Wlb3k2a1LNZpWSuMo36Jzc7owoHSg mleEkZW4yi3BWXat43Ys/gUixMlmPmsHBMTX25hPruCOWl4Fd9aXBHyhjLEfrZ+MxePO/+FN6jN bjaBDCoEwdwUi8S01QE2iqtv01QNIEMpBQ4BVpNwRFvakn4jjhASR/8Dh1fX+pOAOiSNhTKJTZ7 9J0z3FoDNW9SH2w== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D 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: b4e002d8a7ce ("spi: tegra210-quad: Fix timeout handling") Signed-off-by: Breno Leitao --- drivers/spi/spi-tegra210-quad.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-qua= d.c index 669e01d3f56a..79aeb80aa4a7 100644 --- a/drivers/spi/spi-tegra210-quad.c +++ b/drivers/spi/spi-tegra210-quad.c @@ -1288,6 +1288,7 @@ static int tegra_qspi_non_combined_seq_xfer(struct te= gra_qspi *tqspi, struct spi_transfer *transfer; bool is_first_msg =3D true; int ret =3D 0, val =3D 0; + unsigned long flags; =20 msg->status =3D 0; msg->actual_length =3D 0; @@ -1368,7 +1369,9 @@ static int tegra_qspi_non_combined_seq_xfer(struct te= gra_qspi *tqspi, msg->actual_length +=3D xfer->len + dummy_bytes; =20 complete_xfer: + spin_lock_irqsave(&tqspi->lock, flags); tqspi->curr_xfer =3D NULL; + spin_unlock_irqrestore(&tqspi->lock, flags); =20 if (ret < 0) { tegra_qspi_transfer_end(spi); --=20 2.47.3