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 0CE72168C5 for ; Mon, 8 May 2023 10:57:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7887EC433D2; Mon, 8 May 2023 10:57:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683543420; bh=Zhw3seNwclcY1xsjtNPI1K+SbmYITXkLX6uOEZnocbs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1fZCDuGQfziX7oW83QE7VKRlqrt8Jog6hHclT7rUFsc6VYe0su6s8cnN4icz4THgx PgnBhpu7Tt1TpgZKfVorjQtrun379m27IiFl0vz7uLW7x5lo5I890G2NH3VuBWLuU/ MDzzvKHX2Q44rjomEjxRMEYt8BQJaasNBanVhTjM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manivannan Sadhasivam , Krzysztof Kozlowski , Bjorn Andersson , Viresh Kumar Subject: [PATCH 6.3 055/694] cpufreq: qcom-cpufreq-hw: fix double IO unmap and resource release on exit Date: Mon, 8 May 2023 11:38:10 +0200 Message-Id: <20230508094434.381543755@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094432.603705160@linuxfoundation.org> References: <20230508094432.603705160@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: Krzysztof Kozlowski commit ba5e770c9698782bc203bbf5cf3b36a77720bdbe upstream. Commit 054a3ef683a1 ("cpufreq: qcom-hw: Allocate qcom_cpufreq_data during probe") moved getting memory resource and iomap from qcom_cpufreq_hw_cpu_init() to the probe function, however it left untouched cleanup in qcom_cpufreq_hw_cpu_exit(). During device unbind this will lead to doule release of resource and double iounmap(), first by qcom_cpufreq_hw_cpu_exit() and second via managed resources: resource: Trying to free nonexistent resource <0x0000000018593000-0x0000000018593fff> Trying to vunmap() nonexistent vm area (0000000088a7d4dc) ... vunmap (mm/vmalloc.c:2771 (discriminator 1)) iounmap (mm/ioremap.c:60) devm_ioremap_release (lib/devres.c:19) devres_release_all (drivers/base/devres.c:506 drivers/base/devres.c:535) device_unbind_cleanup (drivers/base/dd.c:523) device_release_driver_internal (drivers/base/dd.c:1248 drivers/base/dd.c:1263) device_driver_detach (drivers/base/dd.c:1300) unbind_store (drivers/base/bus.c:243) drv_attr_store (drivers/base/bus.c:127) sysfs_kf_write (fs/sysfs/file.c:137) kernfs_fop_write_iter (fs/kernfs/file.c:334) vfs_write (include/linux/fs.h:1851 fs/read_write.c:491 fs/read_write.c:584) ksys_write (fs/read_write.c:637) __arm64_sys_write (fs/read_write.c:646) invoke_syscall (arch/arm64/include/asm/current.h:19 arch/arm64/kernel/syscall.c:57) el0_svc_common.constprop.0 (arch/arm64/include/asm/daifflags.h:28 arch/arm64/kernel/syscall.c:150) do_el0_svc (arch/arm64/kernel/syscall.c:194) el0_svc (arch/arm64/include/asm/daifflags.h:28 arch/arm64/kernel/entry-common.c:133 arch/arm64/kernel/entry-common.c:142 arch/arm64/kernel/entry-common.c:638) el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:656) el0t_64_sync (arch/arm64/kernel/entry.S:591) Fixes: 054a3ef683a1 ("cpufreq: qcom-hw: Allocate qcom_cpufreq_data during probe") Cc: Cc: Manivannan Sadhasivam Signed-off-by: Krzysztof Kozlowski Reviewed-by: Manivannan Sadhasivam Reviewed-by: Bjorn Andersson Signed-off-by: Viresh Kumar Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/qcom-cpufreq-hw.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -43,7 +43,6 @@ struct qcom_cpufreq_soc_data { struct qcom_cpufreq_data { void __iomem *base; - struct resource *res; /* * Mutex to synchronize between de-init sequence and re-starting LMh @@ -590,16 +589,12 @@ static int qcom_cpufreq_hw_cpu_exit(stru { struct device *cpu_dev = get_cpu_device(policy->cpu); struct qcom_cpufreq_data *data = policy->driver_data; - struct resource *res = data->res; - void __iomem *base = data->base; dev_pm_opp_remove_all_dynamic(cpu_dev); dev_pm_opp_of_cpumask_remove_table(policy->related_cpus); qcom_cpufreq_hw_lmh_exit(data); kfree(policy->freq_table); kfree(data); - iounmap(base); - release_mem_region(res->start, resource_size(res)); return 0; } @@ -718,17 +713,15 @@ static int qcom_cpufreq_hw_driver_probe( for (i = 0; i < num_domains; i++) { struct qcom_cpufreq_data *data = &qcom_cpufreq.data[i]; struct clk_init_data clk_init = {}; - struct resource *res; void __iomem *base; - base = devm_platform_get_and_ioremap_resource(pdev, i, &res); + base = devm_platform_ioremap_resource(pdev, i); if (IS_ERR(base)) { - dev_err(dev, "Failed to map resource %pR\n", res); + dev_err(dev, "Failed to map resource index %d\n", i); return PTR_ERR(base); } data->base = base; - data->res = res; /* Register CPU clock for each frequency domain */ clk_init.name = kasprintf(GFP_KERNEL, "qcom_cpufreq%d", i);