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Tsirkin" , Jason Wang , Xuan Zhuo , Jonathan Corbet , David Hildenbrand , Gerd Hoffmann , Richard Weinberger , Anton Ivanov , Johannes Berg , Paolo Bonzini , Stefan Hajnoczi , Jens Axboe , Marcel Holtmann , Luiz Augusto von Dentz , Olivia Mackall , Herbert Xu , Amit Shah , Arnd Bergmann , Greg Kroah-Hartman , Gonglei , "David S. Miller" , Sudeep Holla , Cristian Marussi , Viresh Kumar , Linus Walleij , Bartosz Golaszewski , David Airlie , Gurchetan Singh , Chia-I Wu , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Daniel Vetter , Jean-Philippe Brucker , Joerg Roedel , Will Deacon , Robin Murphy , Alexander Graf , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Stefano Garzarella , Kalle Valo , Dan Williams , Vishal Verma , Dave Jiang , Ira Weiny , Pankaj Gupta , Bjorn Andersson , Mathieu Poirier , "James E.J. Bottomley" , "Martin K. Petersen" , Vivek Goyal , Miklos Szeredi , Anton Yakovlev , Jaroslav Kysela , Takashi Iwai Cc: virtualization@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, netdev@vger.kernel.org, v9fs@lists.linux.dev, kvm@vger.kernel.org, linux-wireless@vger.kernel.org, nvdimm@lists.linux.dev, linux-remoteproc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, alsa-devel@alsa-project.org, linux-sound@vger.kernel.org, Krzysztof Kozlowski X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3442; i=krzysztof.kozlowski@linaro.org; h=from:subject:message-id; bh=s2Mj8PFVzHUnyWBxfjg5SBZxGZiBlbDBzv7Dx2i8dmM=; b=owEBbQKS/ZANAwAKAcE3ZuaGi4PXAcsmYgBmCSJRMAmo958+gpAdtWf3kAKomp/Ip2aKL9xIN Z2BywqkB02JAjMEAAEKAB0WIQTd0mIoPREbIztuuKjBN2bmhouD1wUCZgkiUQAKCRDBN2bmhouD 189/EACR/B93stOdtu1JuyUNz4OfxjEk8+PI7wALF2CF8wWyUnX1RqIit4KjtyGpz8IU3wUEOGC vvkRH4dWkO4VfbeaYOXrYCQdMtciljn9VQceUtxxpKYZBYDzBXmVArj0/iUj0cb4OBc8fkXvRKi EMTUUcWHJmLIGJvNMN2U4I6qMRSWnpXQAhX5lCoswuE+s9DonLiw+Lv9tFBK/PSWTPZW3CTTOg3 1s6rfpzJpnBxFSTQESh7M1dqpE/85wG8AQoXS/wEZ3AuZTxQbzWxvlymDKo4/D8Zsruaa5cw3mq tmRGWN5AzZOqbZ34CYnxq3SBAjVb/gW8+Bq/PbwZhNYAWM2Rb6QMKUq9n00JqZUc7NwfeT57fO0 6ThiLflUllCHlXzO3VCJooih8+6jhemlv0kSariKz4FEJT//EvDmPMw3zRoQbOdeL2prM2sDXz7 /HCfa04XqJo02JCSS6z3UOMhKyYdESZgy5fqIiutQuKa09AosUkF0rxKZPoBmaaFPSFelMb5gPY kKJaRfbDPV9OOzskHs6efccitB2qx+s4OAVyPIlY5M1M0HEIrYNxHMrylwffbNYJwLfel3k30m3 iAlSeTFkTWrNk/60McW6xVUexB2Kej+RFiAZDn5U6Fs0RtBNfrg6d/X8YVYB7llg9va+5h7WabZ kUag/9PjoTLwGPA== X-Developer-Key: i=krzysztof.kozlowski@linaro.org; a=openpgp; fpr=9BD07E0E0C51F8D59677B7541B93437D3B41629B X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240331_014444_626663_FFE784E6 X-CRM114-Status: GOOD ( 19.25 ) X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org Modules registering driver with register_virtio_driver() might forget to set .owner field. i2c-virtio.c for example has it missing. The field is used by some of other kernel parts for reference counting (try_module_get()), so it is expected that drivers will set it. Solve the problem by moving this task away from the drivers to the core virtio code, just like we did for platform_driver in commit 9447057eaff8 ("platform_device: use a macro instead of platform_driver_register"). Signed-off-by: Krzysztof Kozlowski --- Documentation/driver-api/virtio/writing_virtio_drivers.rst | 1 - drivers/virtio/virtio.c | 6 ++++-- include/linux/virtio.h | 7 +++++-- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/Documentation/driver-api/virtio/writing_virtio_drivers.rst b/Documentation/driver-api/virtio/writing_virtio_drivers.rst index e14c58796d25..e5de6f5d061a 100644 --- a/Documentation/driver-api/virtio/writing_virtio_drivers.rst +++ b/Documentation/driver-api/virtio/writing_virtio_drivers.rst @@ -97,7 +97,6 @@ like this:: static struct virtio_driver virtio_dummy_driver = { .driver.name = KBUILD_MODNAME, - .driver.owner = THIS_MODULE, .id_table = id_table, .probe = virtio_dummy_probe, .remove = virtio_dummy_remove, diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index f173587893cb..9510c551dce8 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -362,14 +362,16 @@ static const struct bus_type virtio_bus = { .remove = virtio_dev_remove, }; -int register_virtio_driver(struct virtio_driver *driver) +int __register_virtio_driver(struct virtio_driver *driver, struct module *owner) { /* Catch this early. */ BUG_ON(driver->feature_table_size && !driver->feature_table); driver->driver.bus = &virtio_bus; + driver->driver.owner = owner; + return driver_register(&driver->driver); } -EXPORT_SYMBOL_GPL(register_virtio_driver); +EXPORT_SYMBOL_GPL(__register_virtio_driver); void unregister_virtio_driver(struct virtio_driver *driver) { diff --git a/include/linux/virtio.h b/include/linux/virtio.h index b0201747a263..26c4325aa373 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -170,7 +170,7 @@ size_t virtio_max_dma_size(const struct virtio_device *vdev); /** * struct virtio_driver - operations for a virtio I/O driver - * @driver: underlying device driver (populate name and owner). + * @driver: underlying device driver (populate name). * @id_table: the ids serviced by this driver. * @feature_table: an array of feature numbers supported by this driver. * @feature_table_size: number of entries in the feature table array. @@ -208,7 +208,10 @@ static inline struct virtio_driver *drv_to_virtio(struct device_driver *drv) return container_of(drv, struct virtio_driver, driver); } -int register_virtio_driver(struct virtio_driver *drv); +/* use a macro to avoid include chaining to get THIS_MODULE */ +#define register_virtio_driver(drv) \ + __register_virtio_driver(drv, THIS_MODULE) +int __register_virtio_driver(struct virtio_driver *drv, struct module *owner); void unregister_virtio_driver(struct virtio_driver *drv); /* module_virtio_driver() - Helper macro for drivers that don't do -- 2.34.1