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 74D9C2C9A; Tue, 22 Jul 2025 14:06:41 +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=1753193201; cv=none; b=PK5TJ3NNZFiSPgNUtOOs18bF4DuMOyVdX+REB4plWdGpr/WXh4f9lHip319Kb6OmqWUtUhzcD3LXs0+VlVlDRlF5iNFRRu9ucJNGc+51elxOsTPrSTdKkH0ZoNl3gbPyCOhkR0KReG5XKasVUuX/1uWuxchrM8DYi7YLd21dUCg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753193201; c=relaxed/simple; bh=8pAZ5nLlINwQc9DCcDkOAlf+MzaiwfYMA4i/+1jbWXQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=bOhWIlo3puGOudORFuB+3JTL/UpG+LLj8z31MoDhSYgQJ4OsFOJry0wns/JyZnKpA6hXWNdbDd7uDIGCGbRgoSQjMmnD0pfWONFaDvClOzNR4QOmSXHFRAjZ7ekg1Ba0o2koFwfo6HQhuR+xkgjbcyHxEJn4cgwsK9xtQTpTWmQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jHC6Puao; 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="jHC6Puao" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F1CB0C4CEEB; Tue, 22 Jul 2025 14:06:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1753193201; bh=8pAZ5nLlINwQc9DCcDkOAlf+MzaiwfYMA4i/+1jbWXQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jHC6PuaoxYz9RpV4VS8BwuaYrJ8CjqPL8JWjHAFR5P/0dPN/8PjV8016b0lGrsf5o 8aOBvXL9HJ0EMieNKIuLj6hxkS4iU25BrqBno0Y7e1lRHRjRvGQRs1gHg/9eCr7mui 1j/9KwbUnC8bqCmFpPXr+PSKpIjM6yhua/aT2zik= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Thomas Fourier , Andy Shevchenko Subject: [PATCH 6.15 021/187] pch_uart: Fix dma_sync_sg_for_device() nents value Date: Tue, 22 Jul 2025 15:43:11 +0200 Message-ID: <20250722134346.548822011@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250722134345.761035548@linuxfoundation.org> References: <20250722134345.761035548@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 6.15-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;