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Revert "driver core: Add deferred_probe attribute to devices in sysfs" 

This reverts commit 6751667a29.

Rob Herring objected to it, and a replacement for it will be added using
debugfs in the future.

Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Reported-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2017-01-14 14:09:03 +01:00
parent a121103c92
commit c7334ce814
4 changed files with 0 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/ABI/testing/sysfs-devices-deferred_probe
View File

@ -1,12 +0,0 @@
What: /sys/devices/.../deferred_probe
Date: August 2016
Contact: Ben Hutchings <ben.hutchings@codethink.co.uk>
Description:
The /sys/devices/.../deferred_probe attribute is
present for all devices. If a driver detects during
probing a device that a related device is not yet
ready, it may defer probing of the first device. The
kernel will retry probing the first device after any
other device is successfully probed. This attribute
reads as 1 if probing of this device is currently
deferred, or 0 otherwise.

2
drivers/base/base.h
View File

@ -141,8 +141,6 @@ extern void device_unblock_probing(void);
extern struct kset *devices_kset;
extern void devices_kset_move_last(struct device *dev);
extern struct device_attribute dev_attr_deferred_probe;
#if defined(CONFIG_MODULES) && defined(CONFIG_SYSFS)
extern void module_add_driver(struct module *mod, struct device_driver *drv);
extern void module_remove_driver(struct device_driver *drv);

7
drivers/base/core.c
View File

@ -1060,14 +1060,8 @@ static int device_add_attrs(struct device *dev)
goto err_remove_dev_groups;
}
error = device_create_file(dev, &dev_attr_deferred_probe);
if (error)
goto err_remove_online;
return 0;
err_remove_online:
device_remove_file(dev, &dev_attr_online);
err_remove_dev_groups:
device_remove_groups(dev, dev->groups);
err_remove_type_groups:
@ -1085,7 +1079,6 @@ static void device_remove_attrs(struct device *dev)
struct class *class = dev->class;
const struct device_type *type = dev->type;
device_remove_file(dev, &dev_attr_deferred_probe);
device_remove_file(dev, &dev_attr_online);
device_remove_groups(dev, dev->groups);

13
drivers/base/dd.c
View File

@ -53,19 +53,6 @@ static LIST_HEAD(deferred_probe_pending_list);
static LIST_HEAD(deferred_probe_active_list);
static atomic_t deferred_trigger_count = ATOMIC_INIT(0);
static ssize_t deferred_probe_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
bool value;
mutex_lock(&deferred_probe_mutex);
value = !list_empty(&dev->p->deferred_probe);
mutex_unlock(&deferred_probe_mutex);
return sprintf(buf, "%d\n", value);
}
DEVICE_ATTR_RO(deferred_probe);
/*
* In some cases, like suspend to RAM or hibernation, It might be reasonable
* to prohibit probing of devices as it could be unsafe.