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Wysocki" , Rodrigo Vivi Subject: Re: [PATCH 04/10] driver core: Don't return EPROBE_DEFER to userspace during sysfs bind Message-ID: <20210615133602.0699492d.alex.williamson@redhat.com> In-Reply-To: <20210615133519.754763-5-hch@lst.de> References: <20210615133519.754763-1-hch@lst.de> <20210615133519.754763-5-hch@lst.de> Organization: Red Hat X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On Tue, 15 Jun 2021 15:35:13 +0200 Christoph Hellwig wrote: > @@ -547,10 +538,9 @@ static int call_driver_probe(struct device *dev, struct device_driver *drv) > > static int really_probe(struct device *dev, struct device_driver *drv) > { > - int local_trigger_count = atomic_read(&deferred_trigger_count); > bool test_remove = IS_ENABLED(CONFIG_DEBUG_TEST_DRIVER_REMOVE) && > !drv->suppress_bind_attrs; > - int ret = -EPROBE_DEFER, probe_ret = 0; > + int ret, probe_ret = 0; nit, probe_ret initialization could be removed with this patch too. > > if (defer_all_probes) { > /* > @@ -559,17 +549,13 @@ static int really_probe(struct device *dev, struct device_driver *drv) > * wait_for_device_probe() right after that to avoid any races. > */ > dev_dbg(dev, "Driver %s force probe deferral\n", drv->name); > - driver_deferred_probe_add(dev); > - return ret; > + return -EPROBE_DEFER; > } > > ret = device_links_check_suppliers(dev); > - if (ret == -EPROBE_DEFER) > - driver_deferred_probe_add_trigger(dev, local_trigger_count); > if (ret) > return ret; > > - atomic_inc(&probe_count); > pr_debug("bus: '%s': %s: probing driver %s with device %s\n", > drv->bus->name, __func__, drv->name, dev_name(dev)); > if (!list_empty(&dev->devres_head)) { > @@ -681,11 +667,7 @@ static int really_probe(struct device *dev, struct device_driver *drv) > dev->pm_domain->dismiss(dev); > pm_runtime_reinit(dev); > dev_pm_set_driver_flags(dev, 0); > - if (probe_ret == -EPROBE_DEFER) > - driver_deferred_probe_add_trigger(dev, local_trigger_count); This was the only possible uninitialized use case afaict. Thanks, Alex