From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DA46528BAB0; Tue, 22 Jul 2025 13:57:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753192651; cv=none; b=dVu2JgK0hbXu/9izzwpg/cIWuySpIbaVkefEEmYPbZ6QFzE/yQH5pJGlysmqt8JCkZjUeeHKIzI78JEYbTZoUEp+CRL3W35pklnUkFCr/HgNQVSRsDaPqEqcwQ0yjp21EmLZR2ncdCkS0PrSNNlCGx9b8eOSTyvcfUF/RlUeR1E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753192651; c=relaxed/simple; bh=F0YczdXaN92Vxsvp1tT3hmp14LXyh/J9JZYFX3ipJmc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WlydVWkUapDC3EJFr0I9OwYSYsjDlLOeplAxbECWmOl+/w3CarY7e4xqje5+5KnpP8S34/Ku5Bo2ORMdV9PK5INqHy6o/gKbeZPUHArsv10I2plGQlzIFZlz24mVIm6TfqfpC95NunHeG3sISUalj0xuYaQqyRTpPgxD/gFyXu4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kGLN4PMn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="kGLN4PMn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54D45C4CEEB; Tue, 22 Jul 2025 13:57:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1753192651; bh=F0YczdXaN92Vxsvp1tT3hmp14LXyh/J9JZYFX3ipJmc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kGLN4PMn1vBnomqLR5Qn12S3OtTImLkwIb2V+Wid5nbicSrAcgsLwzQdqIM6SuwW9 fEKUL/Kl1/OrljXQ00jIHO9OFJjSVHgR7kidgKQXaR+0ed/3eFPNcrGJI0hdXcQ+Xp 5Ra4w09jVZ2YtuwQ7/WmD8QT249oIpMMURHcodN8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Thomas Fourier , Andy Shevchenko Subject: [PATCH 6.12 018/158] pch_uart: Fix dma_sync_sg_for_device() nents value Date: Tue, 22 Jul 2025 15:43:22 +0200 Message-ID: <20250722134341.408697158@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250722134340.596340262@linuxfoundation.org> References: <20250722134340.596340262@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Fourier commit 6c0e9f05c9d7875995b0e92ace71be947f280bbd upstream. 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 according to the documentation in Documentation/core-api/dma-api.rst:450: With the sync_sg API, all the parameters must be the same as those passed into the sg mapping API. Fixes: da3564ee027e ("pch_uart: add multi-scatter processing") Cc: stable Signed-off-by: Thomas Fourier Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20250701113452.18590-2-fourier.thomas@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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 __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 = desc; desc->callback = pch_dma_tx_complete; desc->callback_param = priv;