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authorHans de Goede <hdegoede@redhat.com>2024-08-12 23:39:47 +0300
committerAndi Shyti <andi.shyti@kernel.org>2024-09-10 01:36:56 +0300
commit60f68597024d5af727c8a5f5f3b11f246265192b (patch)
treea5fbf9a095a2e6412778aa96fca7d4240faa4994 /rust/helpers/task.c
parent15b882c6c873f49735a5133ea983a82f9dd65218 (diff)
downloadlinux-60f68597024d5af727c8a5f5f3b11f246265192b.tar.xz
i2c: core: Setup i2c_adapter runtime-pm before calling device_add()
Platform glue code, which is not build into the kernel and thus cannot use i2c_register_board_info() may want to use bus_register_notifier() to listen for i2c-adapters to show up on which the platform code needs to manually instantiate platform specific i2c_clients. This results in calling i2c_new_client_device() from the bus notifier which happens near the device_add() call. If the i2c-core has not yet setup runtime-pm (specifically the no-callbacks and ignore-children flags) for the device embedded inside struct i2c_adapter and the driver for the i2c_client calls pm_runtime_set_active() this will trigger the following error inside __pm_runtime_set_status(): "runtime PM trying to activate child device %s but parent (%s) is not active\n" and the i2c_client's runtime-status will not be updated. Split the device_register() call for the adapter into device_initialize() and device_add() and move the pm-runtime init calls inbetween these 2 calls so that the runtime-status can be correctly set when a driver binds from the bus-notifier. Note the moved pm-runtime init calls just override the initial value of some flags in struct device set by device_initialize() and calling these before device_add() is safe. Reviewed-by: Pali Rohár <pali@kernel.org> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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