diff options
| author | Saravana Kannan <saravanak@google.com> | 2020-11-21 05:02:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-09 21:13:02 +0300 |
| commit | 25ac86c6dbe62fba9b97e997fa648cdbe2d40173 (patch) | |
| tree | 249aaf46122d7df526dc9f2c1079e8bae6579cc9 /drivers/base | |
| parent | c2c724c868c42c5166bf7aa644dd0a0c8d30b47a (diff) | |
| download | linux-25ac86c6dbe62fba9b97e997fa648cdbe2d40173.tar.xz | |
driver core: Use device's fwnode to check if it is waiting for suppliers
To check if a device is still waiting for its supplier devices to be
added, we used to check if the devices is in a global
waiting_for_suppliers list. Since the global list will be deleted in
subsequent patches, this patch stops using this check.
Instead, this patch uses a more device specific check. It checks if the
device's fwnode has any fwnode links that haven't been converted to
device links yet.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20201121020232.908850-14-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/core.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 92a2dc355d13..8a973d9601d3 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -51,6 +51,7 @@ static DEFINE_MUTEX(wfs_lock); static LIST_HEAD(deferred_sync); static unsigned int defer_sync_state_count = 1; static DEFINE_MUTEX(fwnode_link_lock); +static bool fw_devlink_is_permissive(void); /** * fwnode_link_add - Create a link between two fwnode_handles. @@ -995,13 +996,13 @@ int device_links_check_suppliers(struct device *dev) * Device waiting for supplier to become available is not allowed to * probe. */ - mutex_lock(&wfs_lock); - if (!list_empty(&dev->links.needs_suppliers) && - dev->links.need_for_probe) { - mutex_unlock(&wfs_lock); + mutex_lock(&fwnode_link_lock); + if (dev->fwnode && !list_empty(&dev->fwnode->suppliers) && + !fw_devlink_is_permissive()) { + mutex_unlock(&fwnode_link_lock); return -EPROBE_DEFER; } - mutex_unlock(&wfs_lock); + mutex_unlock(&fwnode_link_lock); device_links_write_lock(); @@ -1167,8 +1168,7 @@ static ssize_t waiting_for_supplier_show(struct device *dev, bool val; device_lock(dev); - val = !list_empty(&dev->links.needs_suppliers) - && dev->links.need_for_probe; + val = !list_empty(&dev->fwnode->suppliers); device_unlock(dev); return sysfs_emit(buf, "%u\n", val); } @@ -2200,7 +2200,7 @@ static int device_add_attrs(struct device *dev) goto err_remove_dev_groups; } - if (fw_devlink_flags && !fw_devlink_is_permissive()) { + if (fw_devlink_flags && !fw_devlink_is_permissive() && dev->fwnode) { error = device_create_file(dev, &dev_attr_waiting_for_supplier); if (error) goto err_remove_dev_online; |