diff options
| author |   John Garry <john.garry@huawei.com> | 2019-07-30 21:29:54 +0800 |
|---|---|---|
| committer |   Wei Xu <xuwei5@hisilicon.com> | 2019-08-13 14:54:24 +0800 |
| commit | b884e2de2afc68ce30f7093747378ef972dde253 (patch) | |
| tree | 5cf0eb6a522222635889487bcdc4550b033563ee /lib | |
| parent | lib: logic_pio: Avoid possible overlap for unregistering regions (diff) | |
| download | linux-dev-b884e2de2afc68ce30f7093747378ef972dde253.tar.xz linux-dev-b884e2de2afc68ce30f7093747378ef972dde253.zip | |
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: John Garry <john.garry@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/logic_pio.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/logic_pio.c b/lib/logic_pio.c index d0165c88f705..905027574e5d 100644 --- a/lib/logic_pio.c +++ b/lib/logic_pio.c @@ -99,6 +99,20 @@ end_register: } /** + * 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 * |