Commits

Anonymous committed b37f908

udev: allow firmware requests to bypass the dependency tracking

The removal of the TIMEOUT= handling in udevd put firmware requests into the
devpath parent/child dependency tracking. Drivers which block in module_init()
asking userspace for firmware ran into a 30 sec device timeout.

The whole firmware loading willl hopefully move into the kernel and
the fragile-since-day-one fake async driver-core device dance involving
udev can be retired:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=abb139e75c2cdbb955e840d6331cb5863e409d0e

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Files changed (1)

         size_t devpath_len;
         const char *devpath_old;
         dev_t devnum;
-        bool is_block;
         int ifindex;
+        bool is_block;
+        bool nodelay;
 };
 
 static struct event *node_to_event(struct udev_list_node *node)
         event->devpath_len = strlen(event->devpath);
         event->devpath_old = udev_device_get_devpath_old(dev);
         event->devnum = udev_device_get_devnum(dev);
-        event->is_block = (strcmp("block", udev_device_get_subsystem(dev)) == 0);
+        event->is_block = streq("block", udev_device_get_subsystem(dev));
         event->ifindex = udev_device_get_ifindex(dev);
+        if (streq(udev_device_get_subsystem(dev), "firmware"))
+                event->nodelay = true;
 
         udev_queue_export_device_queued(udev_queue_export, dev);
         info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),
                         return true;
                 }
 
+                /* allow to bypass the dependency tracking */
+                if (event->nodelay)
+                        continue;
+
                 /* parent device event found */
                 if (event->devpath[common] == '/') {
                         event->delaying_seqnum = loop_event->seqnum;