From patchwork Thu Aug 22 20:05:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 11110055 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E51A61399 for ; Thu, 22 Aug 2019 20:06:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C510223404 for ; Thu, 22 Aug 2019 20:06:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566504366; bh=wnzWCTX3n1Kd3FzpTcGUaCEZFXaVUTDLNV9GdS+XwYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=a3P2p9bUodgfDUk24vjUTjMI5a0pEuSWkwbvWZcaShicsCdMMsN3pERh7uZmBE+su frNxnphpsnmFpPAOczSMo+Q8boMygNpfqfr6vXWuI1YGqPZLj7x7DDjiUY0pnUt4Xj drg5FQjg3dtupdfY5YMuMNLIz/QfDUfaNyRN40wg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392628AbfHVUGG (ORCPT ); Thu, 22 Aug 2019 16:06:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:58024 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387738AbfHVUGE (ORCPT ); Thu, 22 Aug 2019 16:06:04 -0400 Received: from localhost (unknown [69.71.4.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EE06923402; Thu, 22 Aug 2019 20:06:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566504363; bh=wnzWCTX3n1Kd3FzpTcGUaCEZFXaVUTDLNV9GdS+XwYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b+H0HWdglpI3rlytE8qsK5lNIN6PHf7qEkYXLl/bQGlqtXVXHUdZAnJQKf3BSlZRB 8MK/zEh7+z0vK06sH5sc99Oj4NSwtB0KsTbX7ci2E2FC/8CaEazgQE8uWEr/aMiMKY HrG+H2oa6x1YY21eNHBcM22BY/e7aCvtgT0WBMjw= From: Bjorn Helgaas To: linux-pci@vger.kernel.org Cc: Lorenzo Pieralisi , Keith Busch , Greg Kroah-Hartman , "Rafael J . Wysocki" , Mika Westerberg , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Bjorn Helgaas , "Rafael J . Wysocki" Subject: [PATCH 2/3] PCI / PM: Decode D3cold power state correctly Date: Thu, 22 Aug 2019 15:05:50 -0500 Message-Id: <20190822200551.129039-3-helgaas@kernel.org> X-Mailer: git-send-email 2.23.0.187.g17f5b7556c-goog In-Reply-To: <20190822200551.129039-1-helgaas@kernel.org> References: <20190822200551.129039-1-helgaas@kernel.org> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Bjorn Helgaas Use pci_power_name() to print pci_power_t correctly. This changes: "state 0" or "D0" to "D0" "state 1" or "D1" to "D1" "state 2" or "D2" to "D2" "state 3" or "D3" to "D3hot" "state 4" or "D4" to "D3cold" Changes dmesg logging only, no other functional change intended. Signed-off-by: Bjorn Helgaas Reviewed-by: Rafael J. Wysocki --- drivers/pci/pci.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index bfc739dc6ada..5f0a3145c3f2 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -834,14 +834,16 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) return -EINVAL; /* - * Validate current state: - * Can enter D0 from any state, but if we can only go deeper - * to sleep if we're already in a low power state + * Validate transition: We can enter D0 from any state, but if + * we're already in a low-power state, we can only go deeper. E.g., + * we can go from D1 to D3, but we can't go directly from D3 to D1; + * we'd have to go from D3 to D0, then to D1. */ if (state != PCI_D0 && dev->current_state <= PCI_D3cold && dev->current_state > state) { - pci_err(dev, "invalid power transition (from state %d to %d)\n", - dev->current_state, state); + pci_err(dev, "invalid power transition (from %s to %s)\n", + pci_power_name(dev->current_state), + pci_power_name(state)); return -EINVAL; } @@ -891,8 +893,8 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr); dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); if (dev->current_state != state && printk_ratelimit()) - pci_info(dev, "Refused to change power state, currently in D%d\n", - dev->current_state); + pci_info(dev, "refused to change power state (currently %s)\n", + pci_power_name(dev->current_state)); /* * According to section 5.4.1 of the "PCI BUS POWER MANAGEMENT