From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Rafael J. Wysocki" <rafael@kernel.org> Cc: Stuart Yoder <stuyoder@gmail.com>, "K. Y. Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Stephen Hemminger <sthemmin@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Bjorn Helgaas <bhelgaas@google.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Vineeth Vijayan <vneethv@linux.ibm.com>, Peter Oberparleiter <oberpar@linux.ibm.com>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Alexander Gordeev <agordeev@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Sven Schnelle <svens@linux.ibm.com>, Andy Gross <agross@kernel.org>, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>, 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 <torvalds@linux-foundation.org>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Andy Shevchenko <andy.shevchenko@gmail.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Subject: [PATCH v6 03/12] fsl-mc: Use driver_set_override() instead of open-coding Date: Sun, 3 Apr 2022 20:37:49 +0200 [thread overview] Message-ID: <20220403183758.192236-4-krzysztof.kozlowski@linaro.org> (raw) In-Reply-To: <20220403183758.192236-1-krzysztof.kozlowski@linaro.org> Use a helper to set driver_override to reduce the amount of duplicated code. Make the driver_override field const char, because it is not modified by the core and it matches other subsystems. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- drivers/bus/fsl-mc/fsl-mc-bus.c | 25 ++++--------------------- include/linux/fsl/mc.h | 6 ++++-- 2 files changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 8fd4a356a86e..ba01c7f4de92 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -166,31 +166,14 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); - char *driver_override, *old = mc_dev->driver_override; - char *cp; + int ret; if (WARN_ON(dev->bus != &fsl_mc_bus_type)) return -EINVAL; - 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'; - - if (strlen(driver_override)) { - mc_dev->driver_override = driver_override; - } else { - kfree(driver_override); - mc_dev->driver_override = NULL; - } - - kfree(old); + ret = driver_set_override(dev, &mc_dev->driver_override, buf, count); + if (ret) + return ret; return count; } diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h index 7b6c42bfb660..7a87ab9eba99 100644 --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -170,7 +170,9 @@ struct fsl_mc_obj_desc { * @regions: pointer to array of MMIO region entries * @irqs: pointer to array of pointers to interrupts allocated to this device * @resource: generic resource associated with this MC object device, if any. - * @driver_override: driver name to force a match + * @driver_override: driver name to force a match; do not set directly, + * because core frees it; use driver_set_override() to + * set or clear it. * * Generic device object for MC object devices that are "attached" to a * MC bus. @@ -204,7 +206,7 @@ struct fsl_mc_device { struct fsl_mc_device_irq **irqs; struct fsl_mc_resource *resource; struct device_link *consumer_link; - char *driver_override; + const char *driver_override; }; #define to_fsl_mc_device(_dev) \ -- 2.32.0
WARNING: multiple messages have this Message-ID (diff)
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Rafael J. Wysocki" <rafael@kernel.org> Cc: Stuart Yoder <stuyoder@gmail.com>, "K. Y. Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Stephen Hemminger <sthemmin@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Bjorn Helgaas <bhelgaas@google.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Vineeth Vijayan <vneethv@linux.ibm.com>, Peter Oberparleiter <oberpar@linux.ibm.com>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Alexander Gordeev <agordeev@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Sven Schnelle <svens@linux.ibm.com>, Andy Gross <agross@kernel.org>, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>, 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 <torvalds@linux-foundation.org>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Andy Shevchenko <andy.shevchenko@gmail.com>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Subject: [PATCH v6 03/12] fsl-mc: Use driver_set_override() instead of open-coding Date: Sun, 3 Apr 2022 20:37:49 +0200 [thread overview] Message-ID: <20220403183758.192236-4-krzysztof.kozlowski@linaro.org> (raw) In-Reply-To: <20220403183758.192236-1-krzysztof.kozlowski@linaro.org> Use a helper to set driver_override to reduce the amount of duplicated code. Make the driver_override field const char, because it is not modified by the core and it matches other subsystems. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- drivers/bus/fsl-mc/fsl-mc-bus.c | 25 ++++--------------------- include/linux/fsl/mc.h | 6 ++++-- 2 files changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 8fd4a356a86e..ba01c7f4de92 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -166,31 +166,14 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); - char *driver_override, *old = mc_dev->driver_override; - char *cp; + int ret; if (WARN_ON(dev->bus != &fsl_mc_bus_type)) return -EINVAL; - 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'; - - if (strlen(driver_override)) { - mc_dev->driver_override = driver_override; - } else { - kfree(driver_override); - mc_dev->driver_override = NULL; - } - - kfree(old); + ret = driver_set_override(dev, &mc_dev->driver_override, buf, count); + if (ret) + return ret; return count; } diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h index 7b6c42bfb660..7a87ab9eba99 100644 --- a/include/linux/fsl/mc.h +++ b/include/linux/fsl/mc.h @@ -170,7 +170,9 @@ struct fsl_mc_obj_desc { * @regions: pointer to array of MMIO region entries * @irqs: pointer to array of pointers to interrupts allocated to this device * @resource: generic resource associated with this MC object device, if any. - * @driver_override: driver name to force a match + * @driver_override: driver name to force a match; do not set directly, + * because core frees it; use driver_set_override() to + * set or clear it. * * Generic device object for MC object devices that are "attached" to a * MC bus. @@ -204,7 +206,7 @@ struct fsl_mc_device { struct fsl_mc_device_irq **irqs; struct fsl_mc_resource *resource; struct device_link *consumer_link; - char *driver_override; + const char *driver_override; }; #define to_fsl_mc_device(_dev) \ -- 2.32.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-04-03 18:38 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-03 18:37 [PATCH v6 00/12] Fix broken usage of driver_override (and kfree of static memory) Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 01/12] driver: platform: Add helper for safer setting of driver_override Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-04 9:16 ` Andy Shevchenko 2022-04-04 9:16 ` Andy Shevchenko 2022-04-04 9:16 ` Andy Shevchenko 2022-04-04 9:16 ` Andy Shevchenko 2022-04-04 9:34 ` Krzysztof Kozlowski 2022-04-04 9:34 ` Krzysztof Kozlowski 2022-04-04 9:34 ` Krzysztof Kozlowski 2022-04-04 10:14 ` Andy Shevchenko 2022-04-04 10:14 ` Andy Shevchenko 2022-04-04 10:14 ` Andy Shevchenko 2022-04-04 10:14 ` Andy Shevchenko 2022-04-03 18:37 ` [PATCH v6 02/12] amba: Use driver_set_override() instead of open-coding Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski [this message] 2022-04-03 18:37 ` [PATCH v6 03/12] fsl-mc: " Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 04/12] hv: " Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 05/12] PCI: " Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 06/12] s390/cio: " Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 07/12] spi: Use helper for safer setting of driver_override Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 08/12] vdpa: " Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 09/12] clk: imx: scu: Fix kfree() of static memory on setting driver_override Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 10/12] slimbus: qcom-ngd: " Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 11/12] rpmsg: Constify local variable in field store macro Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-03 18:37 ` [PATCH v6 12/12] rpmsg: Fix kfree() of static memory on setting driver_override Krzysztof Kozlowski 2022-04-03 18:37 ` Krzysztof Kozlowski 2022-04-12 14:10 ` Biju Das 2022-04-12 14:10 ` Biju Das 2022-04-12 14:10 ` Biju Das 2022-04-13 8:40 ` Krzysztof Kozlowski 2022-04-13 8:40 ` Krzysztof Kozlowski 2022-04-13 8:40 ` Krzysztof Kozlowski 2022-04-13 8:47 ` Biju Das 2022-04-13 8:47 ` Biju Das 2022-04-13 8:47 ` Biju Das
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