From patchwork Wed Sep 25 05:48:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 13811631 Received: from inva021.nxp.com (inva021.nxp.com [92.121.34.21]) (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 E627D154C18 for ; Wed, 25 Sep 2024 06:11:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=92.121.34.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727244683; cv=none; b=SP7ytqvcuWgZa6NDPBoy5n3tDDAra48qouAHLY0DsnTukYBMq+2C1DlJ1ov0O6vRcC8GktN6HGFYt4wLhs1dAVqNguJ8Dry/pOtWm1+dyJU6ItcQZ4gP+MAzwqyQ8h8HO5QFiY8IiUI9S0JkZ/dn38xLpmwH2BhOWjKN31LpyxY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727244683; c=relaxed/simple; bh=/Na4mmXiKLt8UcFVI72fQXazUo7b1yDzIc3NeYd3v20=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=ZlGMQ5EbuGCcG0N+UWFTqak32EQhlwPD+e9od4pCkAFDIslJH9mvEV3powFNch+84TyKA45lkTAkPCgBkXhty0CgCvTfZj+ZSKfrCUAWPffziOkTnrjHM2lJmKHFBW2yrLfDP3JMcZQHw+uH5vgV8eiJhG6sVQj4YsHXFmxC6tU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com; spf=pass smtp.mailfrom=nxp.com; arc=none smtp.client-ip=92.121.34.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nxp.com Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 92CB7201FD3; Wed, 25 Sep 2024 08:11:13 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 2DD93201FE7; Wed, 25 Sep 2024 08:11:13 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id C5AB7183AD51; Wed, 25 Sep 2024 14:11:11 +0800 (+08) From: Richard Zhu To: jingoohan1@gmail.com, manivannan.sadhasivam@linaro.org, kwilczynski@kernel.org, bhelgaas@google.com, lpieralisi@kernel.org, frank.li@nxp.com, robh@kernel.org Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, Richard Zhu Subject: [PATCH v1 2/2] PCI: dwc: Do stop link in the dw_pcie_suspend_noirq Date: Wed, 25 Sep 2024 13:48:37 +0800 Message-Id: <1727243317-15729-3-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1727243317-15729-1-git-send-email-hongxing.zhu@nxp.com> References: <1727243317-15729-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: On i.MX8QM, PCIe link can't be re-established again in dw_pcie_resume_noirq(), if the LTSSM_EN bit is not cleared properly in dw_pcie_suspend_noirq(). Add dw_pcie_stop_link() into dw_pcie_suspend_noirq() to fix this issue and keep symmetric in suspend/resume function since there is dw_pcie_start_link() in dw_pcie_resume_noirq(). Fixes: 4774faf854f5 ("PCI: dwc: Implement generic suspend/resume functionality") Signed-off-by: Richard Zhu Reviewed-by: Frank Li Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-designware-host.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index cb8c3c2bcc79..9ca33895456f 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -952,6 +952,7 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) } } + dw_pcie_stop_link(pci); if (pci->pp.ops->deinit) pci->pp.ops->deinit(&pci->pp);