firewire: core: fix sleep in atomic context due to driver core change

[linux-2.6-omap-h63xx.git] / drivers / firewire / fw-device.c

diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index c173be383725c05fe98d0218ad9c41e6d144eeae..2af5a8d1e012112ceacd08c69b50ae2c3fc202ea 100644 (file)
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -159,7 +159,8 @@ static void fw_device_release(struct device *dev)
 
        /*
         * Take the card lock so we don't set this to NULL while a
-        * FW_NODE_UPDATED callback is being handled.
+        * FW_NODE_UPDATED callback is being handled or while the
+        * bus manager work looks at this node.
         */
        spin_lock_irqsave(&card->lock, flags);
        device->node->data = NULL;
@@ -695,12 +696,13 @@ static void fw_device_init(struct work_struct *work)
                return;
        }
 
-       err = -ENOMEM;
+       device_initialize(&device->device);
 
        fw_device_get(device);
        down_write(&fw_device_rwsem);
-       if (idr_pre_get(&fw_device_idr, GFP_KERNEL))
-               err = idr_get_new(&fw_device_idr, device, &minor);
+       err = idr_pre_get(&fw_device_idr, GFP_KERNEL) ?
+             idr_get_new(&fw_device_idr, device, &minor) :
+             -ENOMEM;
        up_write(&fw_device_rwsem);
 
        if (err < 0)
@@ -911,13 +913,14 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
 
                /*
                 * Do minimal intialization of the device here, the
-                * rest will happen in fw_device_init().  We need the
-                * card and node so we can read the config rom and we
-                * need to do device_initialize() now so
-                * device_for_each_child() in FW_NODE_UPDATED is
-                * doesn't freak out.
+                * rest will happen in fw_device_init().
+                *
+                * Attention:  A lot of things, even fw_device_get(),
+                * cannot be done before fw_device_init() finished!
+                * You can basically just check device->state and
+                * schedule work until then, but only while holding
+                * card->lock.
                 */
-               device_initialize(&device->device);
                atomic_set(&device->state, FW_DEVICE_INITIALIZING);
                device->card = fw_card_get(card);
                device->node = fw_node_get(node);