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 D13FF12CDBF; Sun, 28 Jan 2024 16:15:39 +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=1706458539; cv=none; b=rDaqrTXSFgUATr5v95PnlqgxoFROEol+306CSsDdK6+RGT1QZRGXNQgB6xuPpBxQqitU1HROeuoyzQ6YG5CQ9yg/6h8gY1GaM3HisA1LXVGak6AAdXbI5/bmWemQgFxIkX7rkDarrEpZTHHOuLv+kx8u1trxNov9P9U+xd9M0Kw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706458539; c=relaxed/simple; bh=Xl7920HQkZ7swwIi9lvrg+gUWUgjO2e+J2L2je5hU5s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uw7AFKZrSIJUomR/tiKIrfVtzwcuq81m4uzP1/WinjlUPmSKkj0YOXpNA7nbJiEz2mvu8GNNDTfaplsafPUubGMeNjLWzgsanMCqn3+YkxTLNwQq9mjZYopnVHYiAHya1A4iSjNz7Vxza2h/M0r/QRJODbq4v3p2vuYt0h5B8eg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rcTfUczS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rcTfUczS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7FF3AC433F1; Sun, 28 Jan 2024 16:15:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706458539; bh=Xl7920HQkZ7swwIi9lvrg+gUWUgjO2e+J2L2je5hU5s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rcTfUczSJgks6ar+0kDCH6mENgkHEp4i+hSi3ntv8M+Sqtr2v1e42Vdsg5O4eM51j YiH1uqz6Bh4Zk7+zNerA0LMqpFteAyKbjasLW0ZPDLL4MMMaBk8lH1ag7Mn9zmhNKm Gg61TQMyJfEt6BaA1G/Wzir+y/43jQ0kvwZOjuYQ/FDyH8qjDLIffW6jOsDFWAN7Tl dERQ/rA61qKzSShltJTtWcw5rU0Ynq0HWVaw2UdW5U3ZK1zJdqV3zlOZNmZNm9gPF0 GxjLdVOb/Xi3hRd3HdnYyYez/MYzn914/Sf9dVhgMYosS/a/3Ns2mFnU3d4DqUibT/ CPEj3GMQosSJQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Bjorn Helgaas , Sasha Levin , linux-pci@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 09/19] PCI: Fix 64GT/s effective data rate calculation Date: Sun, 28 Jan 2024 11:15:06 -0500 Message-ID: <20240128161524.204182-9-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240128161524.204182-1-sashal@kernel.org> References: <20240128161524.204182-1-sashal@kernel.org> 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 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.148 Content-Transfer-Encoding: 8bit From: Ilpo Järvinen [ Upstream commit ac4f1897fa5433a1b07a625503a91b6aa9d7e643 ] Unlike the lower rates, the PCIe 64GT/s Data Rate uses 1b/1b encoding, not 128b/130b (PCIe r6.1 sec 1.2, Table 1-1). Correct the PCIE_SPEED2MBS_ENC() calculation to reflect that. Link: https://lore.kernel.org/r/20240102172701.65501-1-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Signed-off-by: Sasha Levin --- drivers/pci/pci.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 72280e9b23b2..2b5337980da7 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -312,7 +312,7 @@ void pci_bus_put(struct pci_bus *bus); /* PCIe speed to Mb/s reduced by encoding overhead */ #define PCIE_SPEED2MBS_ENC(speed) \ - ((speed) == PCIE_SPEED_64_0GT ? 64000*128/130 : \ + ((speed) == PCIE_SPEED_64_0GT ? 64000*1/1 : \ (speed) == PCIE_SPEED_32_0GT ? 32000*128/130 : \ (speed) == PCIE_SPEED_16_0GT ? 16000*128/130 : \ (speed) == PCIE_SPEED_8_0GT ? 8000*128/130 : \ -- 2.43.0