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driver core: Refactor multiple copies of device cleanup 

There are 3 copies of the same device cleanup code used for probe failure,
testing re-probing, and device unbinding. Changes to this code often miss
at least one of the copies of the code. See commits d0243bbd5d ("drivers
core: Free dma_range_map when driver probe failed") and d8f7a5484f
("driver core: Free DMA range map when device is released") for example.

Let's refactor the code to its own function.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220223225257.1681968-2-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring 2022-02-23 16:52:56 -06:00 committed by Greg Kroah-Hartman
parent 5bff9632b5
commit 9ad307213f
1 changed files with 16 additions and 30 deletions
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46
drivers/base/dd.c
View File

@ -506,6 +506,19 @@ static ssize_t state_synced_show(struct device *dev,
}
static DEVICE_ATTR_RO(state_synced);
static void device_unbind_cleanup(struct device *dev)
{
devres_release_all(dev);
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
dev_pm_set_driver_flags(dev, 0);
}
static int call_driver_probe(struct device *dev, struct device_driver *drv)
{
@ -628,16 +641,8 @@ re_probe:
else if (drv->remove)
drv->remove(dev);
devres_release_all(dev);
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
driver_sysfs_remove(dev);
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
device_unbind_cleanup(dev);
goto re_probe;
}
@ -667,16 +672,7 @@ sysfs_failed:
BUS_NOTIFY_DRIVER_NOT_BOUND, dev);
pinctrl_bind_failed:
device_links_no_driver(dev);
devres_release_all(dev);
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
dev_pm_set_driver_flags(dev, 0);
device_unbind_cleanup(dev);
done:
return ret;
}
@ -1209,17 +1205,7 @@ static void __device_release_driver(struct device *dev, struct device *parent)
drv->remove(dev);
device_links_driver_cleanup(dev);
devres_release_all(dev);
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
dev->driver = NULL;
dev_set_drvdata(dev, NULL);
if (dev->pm_domain && dev->pm_domain->dismiss)
dev->pm_domain->dismiss(dev);
pm_runtime_reinit(dev);
dev_pm_set_driver_flags(dev, 0);
device_unbind_cleanup(dev);
klist_remove(&dev->p->knode_driver);
device_pm_check_callbacks(dev);