diff options
Diffstat (limited to 'lib/logic_pio.c')
| -rw-r--r-- | lib/logic_pio.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/logic_pio.c b/lib/logic_pio.c index f32fe481b492..e29496a38d06 100644 --- a/lib/logic_pio.c +++ b/lib/logic_pio.c @@ -20,14 +20,13 @@ static LIST_HEAD(io_range_list); static DEFINE_MUTEX(io_range_mutex); -/* Consider a kernel general helper for this */ -#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) - /** * logic_pio_register_range - register logical PIO range for a host * @new_range: pointer to the IO range to be registered. * * Returns 0 on success, the error code in case of failure. + * If the range already exists, -EEXIST will be returned, which should be + * considered a success. * * Register a new IO range node in the IO range list. */ @@ -51,6 +50,7 @@ int logic_pio_register_range(struct logic_pio_hwaddr *new_range) list_for_each_entry(range, &io_range_list, list) { if (range->fwnode == new_range->fwnode) { /* range already there */ + ret = -EEXIST; goto end_register; } if (range->flags == LOGIC_PIO_CPU_MMIO && @@ -122,7 +122,7 @@ void logic_pio_unregister_range(struct logic_pio_hwaddr *range) * * Traverse the io_range_list to find the registered node for @fwnode. */ -struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode) +struct logic_pio_hwaddr *find_io_range_by_fwnode(const struct fwnode_handle *fwnode) { struct logic_pio_hwaddr *range, *found_range = NULL; @@ -186,7 +186,7 @@ resource_size_t logic_pio_to_hwaddr(unsigned long pio) * * Returns Logical PIO value if successful, ~0UL otherwise */ -unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode, +unsigned long logic_pio_trans_hwaddr(const struct fwnode_handle *fwnode, resource_size_t addr, resource_size_t size) { struct logic_pio_hwaddr *range; |