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 301A51773D for ; Wed, 9 Aug 2023 11:18:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A835CC433C8; Wed, 9 Aug 2023 11:18:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691579918; bh=14HfLpqt8CF1VgRt7g6fsHBbMVs6qAmkoudDqkGz2Jw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nXWgoU2UqjylA0jmn6ANt4nUMdXIhc+kGCC7CuGR1IxBLqndzj87jji4Etlebv3PO /Zq9ikSmGP3/4+lyZGiCDYO0/PB7e5cES7AAFqOoMDoIiZmreBLTcGyobYItHrxOdc pdEebVFotbkeE8nvGumGk+290H9ywku+deWkMrHc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manivannan Sadhasivam , Lorenzo Pieralisi Subject: [PATCH 4.19 162/323] PCI: qcom: Disable write access to read only registers for IP v2.3.3 Date: Wed, 9 Aug 2023 12:40:00 +0200 Message-ID: <20230809103705.564586110@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809103658.104386911@linuxfoundation.org> References: <20230809103658.104386911@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Manivannan Sadhasivam commit a33d700e8eea76c62120cb3dbf5e01328f18319a upstream. In the post init sequence of v2.9.0, write access to read only registers are not disabled after updating the registers. Fix it by disabling the access after register update. Link: https://lore.kernel.org/r/20230619150408.8468-2-manivannan.sadhasivam@linaro.org Fixes: 5d76117f070d ("PCI: qcom: Add support for IPQ8074 PCIe controller") Signed-off-by: Manivannan Sadhasivam Signed-off-by: Lorenzo Pieralisi Cc: Signed-off-by: Greg Kroah-Hartman --- drivers/pci/controller/dwc/pcie-qcom.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -758,6 +758,8 @@ static int qcom_pcie_get_resources_2_4_0 if (IS_ERR(res->phy_ahb_reset)) return PTR_ERR(res->phy_ahb_reset); + dw_pcie_dbi_ro_wr_dis(pci); + return 0; }