firewire: core: fix sleep in atomic context due to driver core change
Due to commit 2831fe6f9cc4e16c103504ee09a47a084297c0f3, "driver core:
create a private portion of struct device", device_initialize() can no
longer be called from atomic contexts.
We now defer it until after config ROM probing. This requires changes
to the bus manager code because this may use a device before it was
probed.
Reported-by: Jay Fenlason <fenlason@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 799f944..6bd91a1 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -209,6 +209,8 @@
unsigned long flags;
int root_id, new_root_id, irm_id, gap_count, generation, grace, rcode;
bool do_reset = false;
+ bool root_device_is_running;
+ bool root_device_is_cmc;
__be32 lock_data[2];
spin_lock_irqsave(&card->lock, flags);
@@ -224,8 +226,9 @@
generation = card->generation;
root_device = root_node->data;
- if (root_device)
- fw_device_get(root_device);
+ root_device_is_running = root_device &&
+ atomic_read(&root_device->state) == FW_DEVICE_RUNNING;
+ root_device_is_cmc = root_device && root_device->cmc;
root_id = root_node->node_id;
grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10));
@@ -308,14 +311,14 @@
* config rom. In either case, pick another root.
*/
new_root_id = local_node->node_id;
- } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) {
+ } else if (!root_device_is_running) {
/*
* If we haven't probed this device yet, bail out now
* and let's try again once that's done.
*/
spin_unlock_irqrestore(&card->lock, flags);
goto out;
- } else if (root_device->cmc) {
+ } else if (root_device_is_cmc) {
/*
* FIXME: I suppose we should set the cmstr bit in the
* STATE_CLEAR register of this node, as described in
@@ -362,8 +365,6 @@
fw_core_initiate_bus_reset(card, 1);
}
out:
- if (root_device)
- fw_device_put(root_device);
fw_node_put(root_node);
fw_node_put(local_node);
out_put_card: