kernel/linux.git/drivers/base/swnode.c, branch v7.1-rc5

Merge tag 'driver-core-7.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

2026-04-19T19:58:08+00:00

Pull driver core fixes from Danilo Krummrich: - Prevent a device from being probed before device_add() has finished initializing it; gate probe with a "ready_to_probe" device flag to avoid races with concurrent driver_register() calls - Fix a kernel-doc warning for DEV_FLAG_COUNT introduced by the above - Return -ENOTCONN from software_node_get_reference_args() when a referenced software node is known but not yet registered, allowing callers to defer probe - In sysfs_group_attrs_change_owner(), also check is_visible_const(); missed when the const variant was introduced * tag 'driver-core-7.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: driver core: Add kernel-doc for DEV_FLAG_COUNT enum value sysfs: attribute_group: Respect is_visible_const() when changing owner software node: return -ENOTCONN when referenced swnode is not registered yet driver core: Don't let a device probe until it's ready

software node: return -ENOTCONN when referenced swnode is not registered yet

2026-04-11T13:57:54+00:00

It's possible that at the time of resolving a reference to a remote software node, the node we know exists is not yet registered as a full firmware node. We currently return -ENOENT in this case but the same error code is also returned in some other cases, like the reference property with given name not existing in the property list of the local software node. It makes sense to let users know that we're dealing with an unregistered software node so that they can defer probe - the situation is somewhat similar to there existing a firmware node to which no device is bound yet - which is valid grounds for probe deferral. To that end: use -ENOTCONN to indicate the software node is "not connected". Acked-by: Andy Shevchenko Signed-off-by: Bartosz Golaszewski Link: https://patch.msgid.link/20260407-swnode-unreg-retcode-v4-1-1b2f0725eb9c@oss.qualcomm.com [ Drop software node backend specifics from fwnode_property_get_reference_args() documentation. - Danilo ] Signed-off-by: Danilo Krummrich

driver core: make software nodes available earlier

2026-04-03T22:33:49+00:00

Software nodes are currently initialized in a function registered as a postcore_initcall(). However, some devices may want to register software nodes earlier than that (or also in a postcore_initcall() where they're at the mercy of the link order). Move the initialization to driver_init() making swnode available much earlier as well as making their initialization time deterministic. Suggested-by: Dmitry Torokhov Signed-off-by: Bartosz Golaszewski Acked-by: Andy Shevchenko Link: https://patch.msgid.link/20260402-nokia770-gpio-swnodes-v5-3-d730db3dd299@oss.qualcomm.com [ Fix typo in the commit message: "s/merci/mercy/". - Danilo ] Signed-off-by: Danilo Krummrich

software node: remove software_node_exit()

2026-04-03T17:39:52+00:00

software_node_exit() is an __exitcall() in a built-in compilation unit so effectively dead code. Remove it. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/20260402-nokia770-gpio-swnodes-v5-2-d730db3dd299@oss.qualcomm.com Signed-off-by: Danilo Krummrich

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

software node: allow referencing firmware nodes

2025-11-20T15:51:48+00:00

At the moment software nodes can only reference other software nodes. This is a limitation for devices created, for instance, on the auxiliary bus with a dynamic software node attached which cannot reference devices the firmware node of which is "real" (as an OF node or otherwise). Make it possible for a software node to reference all firmware nodes in addition to static software nodes. To that end: add a second pointer to struct software_node_ref_args of type struct fwnode_handle. The core swnode code will first check the swnode pointer and if it's NULL, it will assume the fwnode pointer should be set. Software node graphs remain the same, as in: the remote endpoints still have to be software nodes. Acked-by: Linus Walleij Reviewed-by: Sakari Ailus Reviewed-by: Andy Shevchenko Acked-by: Greg Kroah-Hartman Signed-off-by: Bartosz Golaszewski Reviewed-by: Charles Keepax Tested-by: Charles Keepax Signed-off-by: Philipp Zabel

software node: increase the reference of the swnode by its fwnode

2025-11-20T15:51:48+00:00

Once we allow software nodes to reference other kinds of firmware nodes, the node in args will no longer necessarily be a software node so bump its reference count using its fwnode interface. Acked-by: Linus Walleij Reviewed-by: Sakari Ailus Acked-by: Greg Kroah-Hartman Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko Reviewed-by: Charles Keepax Tested-by: Charles Keepax Signed-off-by: Philipp Zabel

software node: read the reference args via the fwnode API

2025-11-20T15:51:48+00:00

Once we allow software nodes to reference all kinds of firmware nodes, the refnode here will no longer necessarily be a software node so read its proprties going through its fwnode implementation. Acked-by: Linus Walleij Reviewed-by: Sakari Ailus Acked-by: Greg Kroah-Hartman Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko Tested-by: Charles Keepax Reviewed-by: Charles Keepax Signed-off-by: Philipp Zabel

software node: Constify node_group in registration functions

2025-08-17T11:18:07+00:00

The software_node_register_node_group() and software_node_unregister_node_group() functions take in essence an array of pointers to software_node structs. Since the functions do not modify the array declare the argument as constant, so that static arrays can be declared as const and annotated as __initconst. Signed-off-by: Dmitry Torokhov Link: https://lore.kernel.org/r/2zny5grbgtwbplynxffxg6dkgjgqf45aigwmgxio5stesdr3wi@gf2zamk5amic Signed-off-by: Greg Kroah-Hartman