diff options
| author | Saravana Kannan <saravanak@google.com> | 2020-12-17 19:16:59 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-07 20:52:58 +0100 |
| commit | 1f0dfa0545e7e1ee42e72f8a7a4888d7b1a59afa (patch) | |
| tree | d3b66156976257438cf48dcb7cc49f8e05f96466 /drivers/base/core.c | |
| parent | 7520962b66906574267994c285d04c739ebaf722 (diff) | |
driver core: Add debug logs for device link related probe deferrals
There's insufficient logging when device links or fw_devlink (waiting to
create device links) cause probe deferrals. This makes it hard to debug
devices not getting probed. So, add debug logs to make it easy to debug.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20201218031703.3053753-2-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 25e08e5f40bd..fe8601197b84 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -929,6 +929,10 @@ int device_links_check_suppliers(struct device *dev) mutex_lock(&fwnode_link_lock); if (dev->fwnode && !list_empty(&dev->fwnode->suppliers) && !fw_devlink_is_permissive()) { + dev_dbg(dev, "probe deferral - wait for supplier %pfwP\n", + list_first_entry(&dev->fwnode->suppliers, + struct fwnode_link, + c_hook)->supplier); mutex_unlock(&fwnode_link_lock); return -EPROBE_DEFER; } @@ -943,6 +947,8 @@ int device_links_check_suppliers(struct device *dev) if (link->status != DL_STATE_AVAILABLE && !(link->flags & DL_FLAG_SYNC_STATE_ONLY)) { device_links_missing_supplier(dev); + dev_dbg(dev, "probe deferral - supplier %s not ready\n", + dev_name(link->supplier)); ret = -EPROBE_DEFER; break; } |