regulator: core: allow regulator_register() with

Merge series from André Draszik <andre.draszik@linaro.org>:

With these attached patches it becomes possible again to support
hardware designs with multiple PMICs where individual rails of each act
as required supplies for rails of the other (due to the latter being
e.g. always-on), and vice-versa.

Google Pixel 6 and 6 Pro (oriole and raven) are examples of such
designs.

Rather than returning -EPORBE_DEFER in regulator_register() when
set_machine_constraints() fails with -EPROBE_DEFER (due to missing
required supplies), we still allow rail registration and try to
reresolve supplies each time a new rail gets registered.

This is implemented using a bus (regulator bus), which allows the core
to reresolve supplies for regulators that still need them whenever new
regulators (i.e. devices) are added.

Using a bus also solves existing problems around late resolution of
supplies as mentioned in the commit message introducing that bus.

The series starts with a few bug fixes and the last two commits
implement the changes mentioned above, but do depend on the bug fixes.

4 files changed, 8 insertions, 5 deletions

diff --git a/lib/crypto/riscv/.gitignore b/lib/crypto/riscv/.gitignore
new file mode 100644
index 000000000000..0d47d4f21c6d
--- /dev/null
+++ b/lib/crypto/riscv/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+poly1305-core.S
diff --git a/lib/idr.c b/lib/idr.c
index e2adc457abb4..457430cff8c5 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -40,6 +40,8 @@ int idr_alloc_u32(struct idr *idr, void *ptr, u32 *nextid,
 
 	if (WARN_ON_ONCE(!(idr->idr_rt.xa_flags & ROOT_IS_IDR)))
 		idr->idr_rt.xa_flags |= IDR_RT_MARKER;
+	if (max < base)
+		return -ENOSPC;
 
 	id = (id < base) ? 0 : id - base;
 	radix_tree_iter_init(&iter, id);
diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
index 50ecf55d2b9c..498cc51e493d 100644
--- a/lib/kunit/Kconfig
+++ b/lib/kunit/Kconfig
@@ -28,7 +28,7 @@ config KUNIT_FAULT_TEST
 	bool "Enable KUnit tests which print BUG stacktraces"
 	depends on KUNIT_TEST
 	depends on !UML
-	default y
+	default !PANIC_ON_OOPS
 	help
 	  Enables fault handling tests for the KUnit framework. These tests may
 	  trigger a kernel BUG(), and the associated stack trace, even when they
diff --git a/lib/kunit/device.c b/lib/kunit/device.c
index 520c1fccee8a..f201aaacd4cf 100644
--- a/lib/kunit/device.c
+++ b/lib/kunit/device.c
@@ -106,8 +106,7 @@ EXPORT_SYMBOL_GPL(kunit_driver_create);
 
 /* Helper which creates a kunit_device, attaches it to the kunit_bus*/
 static struct kunit_device *kunit_device_register_internal(struct kunit *test,
-							   const char *name,
-							   const struct device_driver *drv)
+							   const char *name)
 {
 	struct kunit_device *kunit_dev;
 	int err = -ENOMEM;
@@ -150,7 +149,7 @@ struct device *kunit_device_register_with_driver(struct kunit *test,
 						 const char *name,
 						 const struct device_driver *drv)
 {
-	struct kunit_device *kunit_dev = kunit_device_register_internal(test, name, drv);
+	struct kunit_device *kunit_dev = kunit_device_register_internal(test, name);
 
 	if (IS_ERR_OR_NULL(kunit_dev))
 		return ERR_CAST(kunit_dev);
@@ -172,7 +171,7 @@ struct device *kunit_device_register(struct kunit *test, const char *name)
 	if (IS_ERR(drv))
 		return ERR_CAST(drv);
 
-	dev = kunit_device_register_internal(test, name, drv);
+	dev = kunit_device_register_internal(test, name);
 	if (IS_ERR(dev)) {
 		kunit_release_action(test, driver_unregister_wrapper, (void *)drv);
 		return ERR_CAST(dev);