Commit b884e2de authored by John Garry's avatar John Garry Committed by Wei Xu
Browse files

lib: logic_pio: Add logic_pio_unregister_range()



Add a function to unregister a logical PIO range.

Logical PIO space can still be leaked when unregistering certain
LOGIC_PIO_CPU_MMIO regions, but this acceptable for now since there are no
callers to unregister LOGIC_PIO_CPU_MMIO regions, and the logical PIO
region allocation scheme would need significant work to improve this.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarWei Xu <xuwei5@hisilicon.com>
parent 0a27142b
......@@ -117,6 +117,7 @@ struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode);
unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode,
resource_size_t hw_addr, resource_size_t size);
int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
void logic_pio_unregister_range(struct logic_pio_hwaddr *range);
resource_size_t logic_pio_to_hwaddr(unsigned long pio);
unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
......
......@@ -98,6 +98,20 @@ int logic_pio_register_range(struct logic_pio_hwaddr *new_range)
return ret;
}
/**
* logic_pio_unregister_range - unregister a logical PIO range for a host
* @range: pointer to the IO range which has been already registered.
*
* Unregister a previously-registered IO range node.
*/
void logic_pio_unregister_range(struct logic_pio_hwaddr *range)
{
mutex_lock(&io_range_mutex);
list_del_rcu(&range->list);
mutex_unlock(&io_range_mutex);
synchronize_rcu();
}
/**
* find_io_range_by_fwnode - find logical PIO range for given FW node
* @fwnode: FW node handle associated with logical PIO range
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment