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Mon, 30 Jun 2025 05:21:35 -0700 (PDT) Received: from thomas-precision3591.imag.fr ([2001:660:5301:24:43e:be8c:f80c:622a]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-4538a3fe24esm133800375e9.23.2025.06.30.05.21.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jun 2025 05:21:35 -0700 (PDT) From: Thomas Fourier To: Cc: Thomas Fourier , Jiri Slaby , Andy Shevchenko , Tomoya MORINAGA , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v2] pch_uart: Fix dma_sync_sg_for_device() nents value Date: Mon, 30 Jun 2025 14:10:19 +0200 Message-ID: <20250630121021.106643-2-fourier.thomas@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The dma_sync_sg_for_device() functions should be called with the same nents as the dma_map_sg(), not the value the map function returned. Fixes: da3564ee027e ("pch_uart: add multi-scatter processing") Signed-off-by: Thomas Fourier --- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 508e8c6f01d4..884fefbfd5a1 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -954,7 +954,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *pr= iv) __func__); return 0; } - dma_sync_sg_for_device(port->dev, priv->sg_tx_p, nent, DMA_TO_DEVICE); + dma_sync_sg_for_device(port->dev, priv->sg_tx_p, num, DMA_TO_DEVICE); priv->desc_tx =3D desc; desc->callback =3D pch_dma_tx_complete; desc->callback_param =3D priv; --=20 2.43.0