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-rw-r--r--drivers/base/arch_numa.c2
-rw-r--r--drivers/base/core.c93
-rw-r--r--drivers/base/power/trace.c10
-rw-r--r--drivers/base/swnode.c3
-rw-r--r--drivers/base/test/Makefile2
5 files changed, 80 insertions, 30 deletions
diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c
index 46c503486e96..00fb4120a5b3 100644
--- a/drivers/base/arch_numa.c
+++ b/drivers/base/arch_numa.c
@@ -264,7 +264,7 @@ void __init numa_free_distance(void)
size = numa_distance_cnt * numa_distance_cnt *
sizeof(numa_distance[0]);
- memblock_free(__pa(numa_distance), size);
+ memblock_free_ptr(numa_distance, size);
numa_distance_cnt = 0;
numa_distance = NULL;
}
diff --git a/drivers/base/core.c b/drivers/base/core.c
index e65dd803a453..249da496581a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -95,6 +95,8 @@ int fwnode_link_add(struct fwnode_handle *con, struct fwnode_handle *sup)
list_add(&link->s_hook, &sup->consumers);
list_add(&link->c_hook, &con->suppliers);
+ pr_debug("%pfwP Linked as a fwnode consumer to %pfwP\n",
+ con, sup);
out:
mutex_unlock(&fwnode_link_lock);
@@ -102,6 +104,21 @@ out:
}
/**
+ * __fwnode_link_del - Delete a link between two fwnode_handles.
+ * @link: the fwnode_link to be deleted
+ *
+ * The fwnode_link_lock needs to be held when this function is called.
+ */
+static void __fwnode_link_del(struct fwnode_link *link)
+{
+ pr_debug("%pfwP Dropping the fwnode link to %pfwP\n",
+ link->consumer, link->supplier);
+ list_del(&link->s_hook);
+ list_del(&link->c_hook);
+ kfree(link);
+}
+
+/**
* fwnode_links_purge_suppliers - Delete all supplier links of fwnode_handle.
* @fwnode: fwnode whose supplier links need to be deleted
*
@@ -112,11 +129,8 @@ static void fwnode_links_purge_suppliers(struct fwnode_handle *fwnode)
struct fwnode_link *link, *tmp;
mutex_lock(&fwnode_link_lock);
- list_for_each_entry_safe(link, tmp, &fwnode->suppliers, c_hook) {
- list_del(&link->s_hook);
- list_del(&link->c_hook);
- kfree(link);
- }
+ list_for_each_entry_safe(link, tmp, &fwnode->suppliers, c_hook)
+ __fwnode_link_del(link);
mutex_unlock(&fwnode_link_lock);
}
@@ -131,11 +145,8 @@ static void fwnode_links_purge_consumers(struct fwnode_handle *fwnode)
struct fwnode_link *link, *tmp;
mutex_lock(&fwnode_link_lock);
- list_for_each_entry_safe(link, tmp, &fwnode->consumers, s_hook) {
- list_del(&link->s_hook);
- list_del(&link->c_hook);
- kfree(link);
- }
+ list_for_each_entry_safe(link, tmp, &fwnode->consumers, s_hook)
+ __fwnode_link_del(link);
mutex_unlock(&fwnode_link_lock);
}
@@ -676,7 +687,8 @@ struct device_link *device_link_add(struct device *consumer,
{
struct device_link *link;
- if (!consumer || !supplier || flags & ~DL_ADD_VALID_FLAGS ||
+ if (!consumer || !supplier || consumer == supplier ||
+ flags & ~DL_ADD_VALID_FLAGS ||
(flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) ||
(flags & DL_FLAG_SYNC_STATE_ONLY &&
(flags & ~DL_FLAG_INFERRED) != DL_FLAG_SYNC_STATE_ONLY) ||
@@ -975,6 +987,7 @@ int device_links_check_suppliers(struct device *dev)
{
struct device_link *link;
int ret = 0;
+ struct fwnode_handle *sup_fw;
/*
* Device waiting for supplier to become available is not allowed to
@@ -983,10 +996,11 @@ int device_links_check_suppliers(struct device *dev)
mutex_lock(&fwnode_link_lock);
if (dev->fwnode && !list_empty(&dev->fwnode->suppliers) &&
!fw_devlink_is_permissive()) {
- dev_dbg(dev, "probe deferral - wait for supplier %pfwP\n",
- list_first_entry(&dev->fwnode->suppliers,
- struct fwnode_link,
- c_hook)->supplier);
+ sup_fw = list_first_entry(&dev->fwnode->suppliers,
+ struct fwnode_link,
+ c_hook)->supplier;
+ dev_err_probe(dev, -EPROBE_DEFER, "wait for supplier %pfwP\n",
+ sup_fw);
mutex_unlock(&fwnode_link_lock);
return -EPROBE_DEFER;
}
@@ -1001,8 +1015,9 @@ int device_links_check_suppliers(struct device *dev)
if (link->status != DL_STATE_AVAILABLE &&
!(link->flags & DL_FLAG_SYNC_STATE_ONLY)) {
device_links_missing_supplier(dev);
- dev_dbg(dev, "probe deferral - supplier %s not ready\n",
- dev_name(link->supplier));
+ dev_err_probe(dev, -EPROBE_DEFER,
+ "supplier %s not ready\n",
+ dev_name(link->supplier));
ret = -EPROBE_DEFER;
break;
}
@@ -1722,6 +1737,25 @@ static int fw_devlink_create_devlink(struct device *con,
struct device *sup_dev;
int ret = 0;
+ /*
+ * In some cases, a device P might also be a supplier to its child node
+ * C. However, this would defer the probe of C until the probe of P
+ * completes successfully. This is perfectly fine in the device driver
+ * model. device_add() doesn't guarantee probe completion of the device
+ * by the time it returns.
+ *
+ * However, there are a few drivers that assume C will finish probing
+ * as soon as it's added and before P finishes probing. So, we provide
+ * a flag to let fw_devlink know not to delay the probe of C until the
+ * probe of P completes successfully.
+ *
+ * When such a flag is set, we can't create device links where P is the
+ * supplier of C as that would delay the probe of C.
+ */
+ if (sup_handle->flags & FWNODE_FLAG_NEEDS_CHILD_BOUND_ON_ADD &&
+ fwnode_is_ancestor_of(sup_handle, con->fwnode))
+ return -EINVAL;
+
sup_dev = get_dev_from_fwnode(sup_handle);
if (sup_dev) {
/*
@@ -1772,14 +1806,21 @@ static int fw_devlink_create_devlink(struct device *con,
* be broken by applying logic. Check for these types of cycles and
* break them so that devices in the cycle probe properly.
*
- * If the supplier's parent is dependent on the consumer, then
- * the consumer-supplier dependency is a false dependency. So,
- * treat it as an invalid link.
+ * If the supplier's parent is dependent on the consumer, then the
+ * consumer and supplier have a cyclic dependency. Since fw_devlink
+ * can't tell which of the inferred dependencies are incorrect, don't
+ * enforce probe ordering between any of the devices in this cyclic
+ * dependency. Do this by relaxing all the fw_devlink device links in
+ * this cycle and by treating the fwnode link between the consumer and
+ * the supplier as an invalid dependency.
*/
sup_dev = fwnode_get_next_parent_dev(sup_handle);
if (sup_dev && device_is_dependent(con, sup_dev)) {
- dev_dbg(con, "Not linking to %pfwP - False link\n",
- sup_handle);
+ dev_info(con, "Fixing up cyclic dependency with %pfwP (%s)\n",
+ sup_handle, dev_name(sup_dev));
+ device_links_write_lock();
+ fw_devlink_relax_cycle(con, sup_dev);
+ device_links_write_unlock();
ret = -EINVAL;
} else {
/*
@@ -1858,9 +1899,7 @@ static void __fw_devlink_link_to_consumers(struct device *dev)
if (!own_link || ret == -EAGAIN)
continue;
- list_del(&link->s_hook);
- list_del(&link->c_hook);
- kfree(link);
+ __fwnode_link_del(link);
}
}
@@ -1912,9 +1951,7 @@ static void __fw_devlink_link_to_suppliers(struct device *dev,
if (!own_link || ret == -EAGAIN)
continue;
- list_del(&link->s_hook);
- list_del(&link->c_hook);
- kfree(link);
+ __fwnode_link_del(link);
/* If no device link was created, nothing more to do. */
if (ret)
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index a97f33d0c59f..94665037f4a3 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c
@@ -13,6 +13,7 @@
#include <linux/export.h>
#include <linux/rtc.h>
#include <linux/suspend.h>
+#include <linux/init.h>
#include <linux/mc146818rtc.h>
@@ -165,6 +166,9 @@ void generate_pm_trace(const void *tracedata, unsigned int user)
const char *file = *(const char **)(tracedata + 2);
unsigned int user_hash_value, file_hash_value;
+ if (!x86_platform.legacy.rtc)
+ return;
+
user_hash_value = user % USERHASH;
file_hash_value = hash_string(lineno, file, FILEHASH);
set_magic_time(user_hash_value, file_hash_value, dev_hash_value);
@@ -267,6 +271,9 @@ static struct notifier_block pm_trace_nb = {
static int __init early_resume_init(void)
{
+ if (!x86_platform.legacy.rtc)
+ return 0;
+
hash_value_early_read = read_magic_time();
register_pm_notifier(&pm_trace_nb);
return 0;
@@ -277,6 +284,9 @@ static int __init late_resume_init(void)
unsigned int val = hash_value_early_read;
unsigned int user, file, dev;
+ if (!x86_platform.legacy.rtc)
+ return 0;
+
user = val % USERHASH;
val = val / USERHASH;
file = val % FILEHASH;
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 7bd0f3cfb7eb..c46f6a8e14d2 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -1116,6 +1116,9 @@ int device_create_managed_software_node(struct device *dev,
to_swnode(fwnode)->managed = true;
set_secondary_fwnode(dev, fwnode);
+ if (device_is_registered(dev))
+ software_node_notify(dev);
+
return 0;
}
EXPORT_SYMBOL_GPL(device_create_managed_software_node);
diff --git a/drivers/base/test/Makefile b/drivers/base/test/Makefile
index 64b2f3d744d5..7f76fee6f989 100644
--- a/drivers/base/test/Makefile
+++ b/drivers/base/test/Makefile
@@ -2,4 +2,4 @@
obj-$(CONFIG_TEST_ASYNC_DRIVER_PROBE) += test_async_driver_probe.o
obj-$(CONFIG_DRIVER_PE_KUNIT_TEST) += property-entry-test.o
-CFLAGS_REMOVE_property-entry-test.o += -fplugin-arg-structleak_plugin-byref -fplugin-arg-structleak_plugin-byref-all
+CFLAGS_property-entry-test.o += $(DISABLE_STRUCTLEAK_PLUGIN)
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