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 D36C01ED52 for ; Tue, 25 Jul 2023 11:45:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 523EDC433C8; Tue, 25 Jul 2023 11:45:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1690285545; bh=wAQTzoZ+ovgSO0+VsIDgM9apYuyYS96ZK7wXynhTEjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rjg6zbj1NxgrIs27XdVXGC+QasFIuVhg1Nr2ng3x23tTG4IdVJ5/uWJ7246aZiwdy /56y+kaDOtTOF5XwWUe6BFHvkoej7jJjB94z15VgP/CypGRnkAQpcK6nS+vZHsB97W N7JNoX2MBgF3ap5X8p1TYoII/fpG49qwgT6sVr9I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manivannan Sadhasivam , Lorenzo Pieralisi Subject: [PATCH 5.4 243/313] PCI: qcom: Disable write access to read only registers for IP v2.3.3 Date: Tue, 25 Jul 2023 12:46:36 +0200 Message-ID: <20230725104531.573381204@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725104521.167250627@linuxfoundation.org> References: <20230725104521.167250627@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 @@ -807,6 +807,8 @@ static int qcom_pcie_get_resources_2_4_0 return PTR_ERR(res->phy_ahb_reset); } + dw_pcie_dbi_ro_wr_dis(pci); + return 0; }