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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id s15sm954628ejm.70.2022.02.23.23.49.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Feb 2022 23:49:16 -0800 (PST) Message-ID: Date: Thu, 24 Feb 2022 08:49:15 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH v2 05/11] pci: use helper for safer setting of driver_override Content-Language: en-US To: Bjorn Helgaas Cc: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds , Rasmus Villemoes References: <20220223215115.GA155125@bhelgaas> From: Krzysztof Kozlowski In-Reply-To: <20220223215115.GA155125@bhelgaas> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On 23/02/2022 22:51, Bjorn Helgaas wrote: > In subject, to match drivers/pci/ convention, do something like: > > PCI: Use driver_set_override() instead of open-coding > > On Wed, Feb 23, 2022 at 08:13:04PM +0100, Krzysztof Kozlowski wrote: >> Use a helper for seting driver_override to reduce amount of duplicated >> code. > > s/seting/setting/ > >> Signed-off-by: Krzysztof Kozlowski >> --- >> drivers/pci/pci-sysfs.c | 24 ++++-------------------- >> 1 file changed, 4 insertions(+), 20 deletions(-) >> >> diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c >> index 602f0fb0b007..16a163d4623e 100644 >> --- a/drivers/pci/pci-sysfs.c >> +++ b/drivers/pci/pci-sysfs.c >> @@ -567,31 +567,15 @@ static ssize_t driver_override_store(struct device *dev, >> const char *buf, size_t count) >> { >> struct pci_dev *pdev = to_pci_dev(dev); >> - char *driver_override, *old, *cp; >> + int ret; >> >> /* We need to keep extra room for a newline */ >> if (count >= (PAGE_SIZE - 1)) >> return -EINVAL; > > This check makes no sense in the new function. Michael alluded to > this as well. I am not sure if I got your comment properly. You mean here: 1. Move this check to driver_set_override()? 2. Remove the check entirely? > >> - driver_override = kstrndup(buf, count, GFP_KERNEL); >> - if (!driver_override) >> - return -ENOMEM; >> - >> - cp = strchr(driver_override, '\n'); >> - if (cp) >> - *cp = '\0'; >> - >> - device_lock(dev); >> - old = pdev->driver_override; >> - if (strlen(driver_override)) { >> - pdev->driver_override = driver_override; >> - } else { >> - kfree(driver_override); >> - pdev->driver_override = NULL; >> - } >> - device_unlock(dev); >> - >> - kfree(old); >> + ret = driver_set_override(dev, &pdev->driver_override, buf); >> + if (ret) >> + return ret; >> >> return count; >> } >> -- >> 2.32.0 >> >> >> _______________________________________________ >> linux-arm-kernel mailing list >> linux-arm-kernel@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel Best regards, Krzysztof