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 8755B1F941 for ; Fri, 21 Jul 2023 16:19:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A4F92C433C9; Fri, 21 Jul 2023 16:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689956342; bh=Azn/iyG04MtMTv3oTqSeSfAQiDTge9ISj8jyKXCYGQM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SHy6wWufwRb06gjIctNEEhaxvNWko9L5vfG3hj/EsAfftnuMgJQ3zncV8uHTzpEWT doyE3wI+kIwbZSt55sG7PK7yRXK67MRHPPs7r9uD8HeCWJFWSPWJNlRPQCf+qycJDc Z0SqWFifp3y8qvDNSbxv0wbzRsMJVf6N5YUV6ISo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manivannan Sadhasivam , Lorenzo Pieralisi Subject: [PATCH 6.4 173/292] PCI: qcom: Disable write access to read only registers for IP v2.3.3 Date: Fri, 21 Jul 2023 18:04:42 +0200 Message-ID: <20230721160536.334785645@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160528.800311148@linuxfoundation.org> References: <20230721160528.800311148@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 @@ -834,6 +834,8 @@ static int qcom_pcie_post_init_2_3_3(str writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset + PCI_EXP_DEVCTL2); + dw_pcie_dbi_ro_wr_dis(pci); + return 0; }