A device probe deferred because of a device link is never probed again because it is not added to the deferred_probe_pending_list. Add it, taking care of the race with driver_deferred_probe_trigger().
Signed-off-by: Adrian Hunter <[email protected]> --- drivers/base/dd.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index ad44b40fe284..e4a5bef93344 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -350,6 +350,15 @@ int device_bind_driver(struct device *dev) static atomic_t probe_count = ATOMIC_INIT(0); static DECLARE_WAIT_QUEUE_HEAD(probe_waitqueue); +static void driver_deferred_probe_add_trigger(struct device *dev, + int local_trigger_count) +{ + driver_deferred_probe_add(dev); + /* Did a trigger occur while probing? Need to re-trigger if yes */ + if (local_trigger_count != atomic_read(&deferred_trigger_count)) + driver_deferred_probe_trigger(); +} + static int really_probe(struct device *dev, struct device_driver *drv) { int ret = -EPROBE_DEFER; @@ -369,6 +378,8 @@ static int really_probe(struct device *dev, struct device_driver *drv) } ret = device_links_check_suppliers(dev); + if (ret == -EPROBE_DEFER) + driver_deferred_probe_add_trigger(dev, local_trigger_count); if (ret) return ret; @@ -469,10 +480,7 @@ static int really_probe(struct device *dev, struct device_driver *drv) case -EPROBE_DEFER: /* Driver requested deferred probing */ dev_dbg(dev, "Driver %s requests probe deferral\n", drv->name); - driver_deferred_probe_add(dev); - /* Did a trigger occur while probing? Need to re-trigger if yes */ - if (local_trigger_count != atomic_read(&deferred_trigger_count)) - driver_deferred_probe_trigger(); + driver_deferred_probe_add_trigger(dev, local_trigger_count); break; case -ENODEV: case -ENXIO: -- 1.9.1
