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[2001:1c00:c1e:bf00:37a3:353b:be90:1238]) by smtp.gmail.com with ESMTPSA id k6sm9752409ejb.84.2021.02.02.10.33.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Feb 2021 10:33:19 -0800 (PST) Subject: Re: [PATCH] platform/x86: amd-pmc: put device on error paths To: Pan Bian , Shyam Sundar S K , Mark Gross Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210121045005.73342-1-bianpan2016@163.com> From: Hans de Goede Message-ID: Date: Tue, 2 Feb 2021 19:33:19 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 In-Reply-To: <20210121045005.73342-1-bianpan2016@163.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 1/21/21 5:50 AM, Pan Bian wrote: > Put the PCI device rdev on error paths to fix potential reference count > leaks. > > Signed-off-by: Pan Bian Thank you for your patch, I've applied this patch to my review-hans branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans Note it will show up in my review-hans branch once I've pushed my local branch there, which might take a while. Once I've run some tests on this branch the patches there will be added to the platform-drivers-x86/for-next branch and eventually will be included in the pdx86 pull-request to Linus for the next merge-window. Regards, Hans > --- > drivers/platform/x86/amd-pmc.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c > index 0102bf1c7916..df140019c4bd 100644 > --- a/drivers/platform/x86/amd-pmc.c > +++ b/drivers/platform/x86/amd-pmc.c > @@ -210,31 +210,39 @@ static int amd_pmc_probe(struct platform_device *pdev) > dev->dev = &pdev->dev; > > rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); > - if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) > + if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) { > + pci_dev_put(rdev); > return -ENODEV; > + } > > dev->cpu_id = rdev->device; > err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_LO); > if (err) { > dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); > + pci_dev_put(rdev); > return pcibios_err_to_errno(err); > } > > err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); > - if (err) > + if (err) { > + pci_dev_put(rdev); > return pcibios_err_to_errno(err); > + } > > base_addr_lo = val & AMD_PMC_BASE_ADDR_HI_MASK; > > err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_HI); > if (err) { > dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); > + pci_dev_put(rdev); > return pcibios_err_to_errno(err); > } > > err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); > - if (err) > + if (err) { > + pci_dev_put(rdev); > return pcibios_err_to_errno(err); > + } > > base_addr_hi = val & AMD_PMC_BASE_ADDR_LO_MASK; > pci_dev_put(rdev); >