diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/bus.c | 38 | ||||
| -rw-r--r-- | drivers/base/firmware_loader/Kconfig | 2 |
2 files changed, 39 insertions, 1 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 320e155c6be7..9eb7771706f0 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -334,6 +334,19 @@ static struct device *next_device(struct klist_iter *i) return dev; } +static struct device *prev_device(struct klist_iter *i) +{ + struct klist_node *n = klist_prev(i); + struct device *dev = NULL; + struct device_private *dev_prv; + + if (n) { + dev_prv = to_device_private_bus(n); + dev = dev_prv->device; + } + return dev; +} + /** * bus_for_each_dev - device iterator. * @bus: bus type. @@ -414,6 +427,31 @@ struct device *bus_find_device(const struct bus_type *bus, } EXPORT_SYMBOL_GPL(bus_find_device); +struct device *bus_find_device_reverse(const struct bus_type *bus, + struct device *start, const void *data, + device_match_t match) +{ + struct subsys_private *sp = bus_to_subsys(bus); + struct klist_iter i; + struct device *dev; + + if (!sp) + return NULL; + + klist_iter_init_node(&sp->klist_devices, &i, + (start ? &start->p->knode_bus : NULL)); + while ((dev = prev_device(&i))) { + if (match(dev, data)) { + get_device(dev); + break; + } + } + klist_iter_exit(&i); + subsys_put(sp); + return dev; +} +EXPORT_SYMBOL_GPL(bus_find_device_reverse); + static struct device_driver *next_driver(struct klist_iter *i) { struct klist_node *n = klist_next(i); diff --git a/drivers/base/firmware_loader/Kconfig b/drivers/base/firmware_loader/Kconfig index 752b9a9bea03..15eff8a4b505 100644 --- a/drivers/base/firmware_loader/Kconfig +++ b/drivers/base/firmware_loader/Kconfig @@ -38,7 +38,7 @@ config FW_LOADER_DEBUG config RUST_FW_LOADER_ABSTRACTIONS bool "Rust Firmware Loader abstractions" depends on RUST - depends on FW_LOADER=y + select FW_LOADER help This enables the Rust abstractions for the firmware loader API. |