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 B84A92E3FB; Sun, 28 Jan 2024 16:12:00 +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=1706458320; cv=none; b=OgFZBQvQcLo+xMzp4Z1osr4vHMokOAxST3AF1oOvo8cjynx7Jmuegb5B8omN9VwR1kmQU61jN56uaxaHAPHi6PMu4lHTRjGKPupvlLNZs13o0LT8TQNfUEwbpxnotv3RloUeI1HwXYfULcII/GZwclIdcEdBiErcHepaCjTQcDE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706458320; c=relaxed/simple; bh=aLHfVWaKvEX0qXeOY8RTqK/CpbpIPh/f3Oro8S0qHGY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Uvdc2f+GEAzxg9wGuygK/O0Rn+imeqjfd82II400Bxbj+gVPtgT3I9Bvkou2KAafHRTRWec5quxkGYafHUBu/RLVdViPz3UhftLqQplZhL+/KGSj8BoemPLY1Qds335FYtCOjV+tT5IHQ0SX5wCnNI9hgIHu0J5Bw4HBwYHFpDs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uj6VoHHy; 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="uj6VoHHy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92D69C43399; Sun, 28 Jan 2024 16:11:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706458320; bh=aLHfVWaKvEX0qXeOY8RTqK/CpbpIPh/f3Oro8S0qHGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uj6VoHHyggjJkdjTqji+qAw32BOuBG6nAU1v1LGuQi4GO1YOync6uPja1k2+/KHfv Qy0jQXqLpmTNoatte3l3poGuFq0uxuF3aKCgesXnCkwoevAEbwytW7wrGxTNY9JZIW 8emSi/enSI/SSKDjZgVdSh6vzu9J/RSTAP6zS/ZPj71YdVXGshY/PhzwGdB+Ndc7GF Jb/+GeXM0xOFCJ7rYtqUDvD0cWZ6HTEQI6ZjPY/SLNVuWY1pOGkY89hUencmdjtd+b YUcXAEZW0yge8zpiOjXQQG2qZLmnTBIlhub0KSvFID7kIbwFnNaj0RY15C1YaKX4rq z3budv9H2d4tA== 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 6.7 16/39] PCI: Fix 64GT/s effective data rate calculation Date: Sun, 28 Jan 2024 11:10:36 -0500 Message-ID: <20240128161130.200783-16-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240128161130.200783-1-sashal@kernel.org> References: <20240128161130.200783-1-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 6.7.2 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 f43873049d52..c6283ba78197 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -272,7 +272,7 @@ 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