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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.14.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:14:01 -0800 (PST) From: Krzysztof Kozlowski To: 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 Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 06/11] s390: cio: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:05 +0100 Message-Id: <20220223191310.347669-7-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/s390/cio/css.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index fa8293335077..2ced49be1912 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -338,31 +338,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct subchannel *sch = to_subchannel(dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - 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 = sch->driver_override; - if (strlen(driver_override)) { - sch->driver_override = driver_override; - } else { - kfree(driver_override); - sch->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &dev->driver_override, buf); + if (ret) + return ret; return count; }