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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id v30sm942368ejv.76.2022.02.23.23.47.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Feb 2022 23:47:24 -0800 (PST) Message-ID: Date: Thu, 24 Feb 2022 08:47:22 +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 01/11] driver: platform: add and 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: <20220223215342.GA155282@bhelgaas> From: Krzysztof Kozlowski In-Reply-To: <20220223215342.GA155282@bhelgaas> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 23/02/2022 22:53, Bjorn Helgaas wrote: > On Wed, Feb 23, 2022 at 08:13:00PM +0100, Krzysztof Kozlowski wrote: >> Several core drivers and buses expect that driver_override is a >> dynamically allocated memory thus later they can kfree() it. >> ... > >> + * set_driver_override() - Helper to set or clear driver override. > > Doesn't match actual function name. Good point. I wonder why build W=1 did not complain... I need to check. > >> + * @dev: Device to change >> + * @override: Address of string to change (e.g. &device->driver_override); >> + * The contents will be freed and hold newly allocated override. >> + * @s: NULL terminated string, new driver name to force a match, pass empty >> + * string to clear it >> + * >> + * Helper to setr or clear driver override in a device, intended for the cases >> + * when the driver_override field is allocated by driver/bus code. > > s/setr/set/ Right. Thanks for checking. > >> + * Returns: 0 on success or a negative error code on failure. >> + */ >> +int driver_set_override(struct device *dev, char **override, const char *s) >> +{ Best regards, Krzysztof