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driver core: bus: constify bus_get()

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It's funny to think about getting a reference count of a constant
structure pointer, but this locks into place the private data
"underneath" the struct bus_type() which is important to not go away
while we are working with the bus structure for some callbacks.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230313182918.1312597-27-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-03-13 19:29:09 +01:00
parent 7c06be0425
commit 38370c4e25
1 changed files with 3 additions and 3 deletions
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6
drivers/base/bus.c
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@ -84,7 +84,7 @@ done:
return sp;
}
static struct bus_type *bus_get(struct bus_type *bus)
static const struct bus_type *bus_get(const struct bus_type *bus)
{
struct subsys_private *sp = bus_to_subsys(bus);
@ -233,7 +233,7 @@ static const struct kset_uevent_ops bus_uevent_ops = {
static ssize_t unbind_store(struct device_driver *drv, const char *buf,
size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
const struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
int err = -ENODEV;
@ -256,7 +256,7 @@ static DRIVER_ATTR_IGNORE_LOCKDEP(unbind, 0200, NULL, unbind_store);
static ssize_t bind_store(struct device_driver *drv, const char *buf,
size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
const struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
int err = -ENODEV;