#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/rculist.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
{
struct fw_address_handler *handler;
- list_for_each_entry(handler, list, link) {
+ list_for_each_entry_rcu(handler, list, link) {
if (handler->offset < offset + length &&
offset < handler->offset + handler->length)
return handler;
{
struct fw_address_handler *handler;
- list_for_each_entry(handler, list, link) {
+ list_for_each_entry_rcu(handler, list, link) {
if (is_enclosing_handler(handler, offset, length))
return handler;
}
return NULL;
}
-static DEFINE_SPINLOCK(address_handler_lock);
+static DEFINE_SPINLOCK(address_handler_list_lock);
static LIST_HEAD(address_handler_list);
const struct fw_address_region fw_high_memory_region =
* the specified callback is invoked. The parameters passed to the callback
* give the details of the particular request.
*
+ * To be called in process context.
* Return value: 0 on success, non-zero otherwise.
*
* The start offset of the handler's address region is determined by
handler->length == 0)
return -EINVAL;
- spin_lock_bh(&address_handler_lock);
+ spin_lock(&address_handler_list_lock);
handler->offset = region->start;
while (handler->offset + handler->length <= region->end) {
if (other != NULL) {
handler->offset += other->length;
} else {
- list_add_tail(&handler->link, &address_handler_list);
+ list_add_tail_rcu(&handler->link, &address_handler_list);
ret = 0;
break;
}
}
- spin_unlock_bh(&address_handler_lock);
+ spin_unlock(&address_handler_list_lock);
return ret;
}
/**
* fw_core_remove_address_handler() - unregister an address handler
*
+ * To be called in process context.
+ *
* When fw_core_remove_address_handler() returns, @handler->callback() is
* guaranteed to not run on any CPU anymore.
*/
void fw_core_remove_address_handler(struct fw_address_handler *handler)
{
- spin_lock_bh(&address_handler_lock);
- list_del(&handler->link);
- spin_unlock_bh(&address_handler_lock);
+ spin_lock(&address_handler_list_lock);
+ list_del_rcu(&handler->link);
+ spin_unlock(&address_handler_list_lock);
+ synchronize_rcu();
}
EXPORT_SYMBOL(fw_core_remove_address_handler);
if (tcode == TCODE_LOCK_REQUEST)
tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]);
- spin_lock_bh(&address_handler_lock);
+ rcu_read_lock();
handler = lookup_enclosing_address_handler(&address_handler_list,
offset, request->length);
if (handler)
p->generation, offset,
request->data, request->length,
handler->callback_data);
- spin_unlock_bh(&address_handler_lock);
+ rcu_read_unlock();
if (!handler)
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
return;
}
- spin_lock_bh(&address_handler_lock);
- list_for_each_entry(handler, &address_handler_list, link) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(handler, &address_handler_list, link) {
if (is_enclosing_handler(handler, offset, request->length))
handler->address_callback(card, NULL, tcode,
destination, source,
request->length,
handler->callback_data);
}
- spin_unlock_bh(&address_handler_lock);
+ rcu_read_unlock();
fw_send_response(card, request, RCODE_COMPLETE);
}