user/sven/linux.git/drivers/opp, branch v6.14.6

Merge tag 'driver-core-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2025-01-28T20:25:12Z

Pull driver core and debugfs updates from Greg KH: "Here is the big set of driver core and debugfs updates for 6.14-rc1. Included in here is a bunch of driver core, PCI, OF, and platform rust bindings (all acked by the different subsystem maintainers), hence the merge conflict with the rust tree, and some driver core api updates to mark things as const, which will also require some fixups due to new stuff coming in through other trees in this merge window. There are also a bunch of debugfs updates from Al, and there is at least one user that does have a regression with these, but Al is working on tracking down the fix for it. In my use (and everyone else's linux-next use), it does not seem like a big issue at the moment. Here's a short list of the things in here: - driver core rust bindings for PCI, platform, OF, and some i/o functions. We are almost at the "write a real driver in rust" stage now, depending on what you want to do. - misc device rust bindings and a sample driver to show how to use them - debugfs cleanups in the fs as well as the users of the fs api for places where drivers got it wrong or were unnecessarily doing things in complex ways. - driver core const work, making more of the api take const * for different parameters to make the rust bindings easier overall. - other small fixes and updates All of these have been in linux-next with all of the aforementioned merge conflicts, and the one debugfs issue, which looks to be resolved "soon"" * tag 'driver-core-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (95 commits) rust: device: Use as_char_ptr() to avoid explicit cast rust: device: Replace CString with CStr in property_present() devcoredump: Constify 'struct bin_attribute' devcoredump: Define 'struct bin_attribute' through macro rust: device: Add property_present() saner replacement for debugfs_rename() orangefs-debugfs: don't mess with ->d_name octeontx2: don't mess with ->d_parent or ->d_parent->d_name arm_scmi: don't mess with ->d_parent->d_name slub: don't mess with ->d_name sof-client-ipc-flood-test: don't mess with ->d_name qat: don't mess with ->d_name xhci: don't mess with ->d_iname mtu3: don't mess wiht ->d_iname greybus/camera - stop messing with ->d_iname mediatek: stop messing with ->d_iname netdevsim: don't embed file_operations into your structs b43legacy: make use of debugfs_get_aux() b43: stop embedding struct file_operations into their objects carl9170: stop embedding file_operations into their objects ...

PM / OPP: Add reference counting helpers for Rust implementation

2025-01-20T03:35:51Z

To ensure that resources such as OPP tables or OPP nodes are not freed while in use by the Rust implementation, it is necessary to increment their reference count from Rust code. This commit introduces a new helper function, dev_pm_opp_get_opp_table_ref(), to increment the reference count of an OPP table and declares the existing helper dev_pm_opp_get() in pm_opp.h. Signed-off-by: Viresh Kumar

saner replacement for debugfs_rename()

2025-01-15T12:14:37Z

Existing primitive has several problems: 1) calling conventions are clumsy - it returns a dentry reference that is either identical to its second argument or is an ERR_PTR(-E...); in both cases no refcount changes happen. Inconvenient for users and bug-prone; it would be better to have it return 0 on success and -E... on failure. 2) it allows cross-directory moves; however, no such caller have ever materialized and considering the way debugfs is used, it's unlikely to happen in the future. What's more, any such caller would have fun issues to deal with wrt interplay with recursive removal. It also makes the calling conventions clumsier... 3) tautological rename fails; the callers have no race-free way to deal with that. 4) new name must have been formed by the caller; quite a few callers have it done by sprintf/kasprintf/etc., ending up with considerable boilerplate. Proposed replacement: int debugfs_change_name(dentry, fmt, ...). All callers convert to that easily, and it's simpler internally. IMO debugfs_rename() should go; if we ever get a real-world use case for cross-directory moves in debugfs, we can always look into the right way to handle that. Signed-off-by: Al Viro Link: https://lore.kernel.org/r/20250112080705.141166-21-viro@zeniv.linux.org.uk Signed-off-by: Greg Kroah-Hartman

OPP: OF: Fix an OF node leak in _opp_add_static_v2()

2025-01-07T06:07:52Z

_opp_add_static_v2() leaks the obtained OF node reference when _of_opp_alloc_required_opps() fails. Add an of_node_put() call in the error path. Fixes: 3466ea2cd6b6 ("OPP: Don't drop opp->np reference while it is still in use") Signed-off-by: Joe Hattori Signed-off-by: Viresh Kumar

OPP: fix dev_pm_opp_find_bw_*() when bandwidth table not initialized

2024-12-23T10:57:24Z

If a driver calls dev_pm_opp_find_bw_ceil/floor() the retrieve bandwidth from the OPP table but the bandwidth table was not created because the interconnect properties were missing in the OPP consumer node, the kernel will crash with: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 ... pc : _read_bw+0x8/0x10 lr : _opp_table_find_key+0x9c/0x174 ... Call trace: _read_bw+0x8/0x10 (P) _opp_table_find_key+0x9c/0x174 (L) _find_key+0x98/0x168 dev_pm_opp_find_bw_ceil+0x50/0x88 ... In order to fix the crash, create an assert function to check if the bandwidth table was created before trying to get a bandwidth with _read_bw(). Fixes: add1dc094a74 ("OPP: Use generic key finding helpers for bandwidth key") Signed-off-by: Neil Armstrong Signed-off-by: Viresh Kumar

OPP: add index check to assert to avoid buffer overflow in _read_freq()

2024-12-23T10:57:23Z

Pass the freq index to the assert function to make sure we do not read a freq out of the opp->rates[] table when called from the indexed variants: dev_pm_opp_find_freq_exact_indexed() or dev_pm_opp_find_freq_ceil/floor_indexed(). Add a secondary parameter to the assert function, unused for assert_single_clk() then add assert_clk_index() which will check for the clock index when called from the _indexed() find functions. Fixes: 142e17c1c2b4 ("OPP: Introduce dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs") Fixes: a5893928bb17 ("OPP: Add dev_pm_opp_find_freq_exact_indexed()") Signed-off-by: Neil Armstrong Signed-off-by: Viresh Kumar

opp: core: Fix off by one in dev_pm_opp_get_bw()

2024-12-23T10:57:23Z

The "opp->bandwidth" array has "opp->opp_table->path_count" number of elements. It's allocated in _opp_allocate(). So this > needs to be >= to prevent an out of bounds access. Fixes: d78653dcd8bf ("opp: core: implement dev_pm_opp_get_bw") Signed-off-by: Dan Carpenter Signed-off-by: Viresh Kumar

opp: core: implement dev_pm_opp_get_bw

2024-12-23T10:57:22Z

Add and implement dev_pm_opp_get_bw() to retrieve the OPP's bandwidth in the same way as the dev_pm_opp_get_voltage() helper. Retrieving bandwidth is required in the case of the Adreno GPU where the GPU Management Unit can handle the Bandwidth scaling. The helper can get the peak or average bandwidth for any of the interconnect path. Signed-off-by: Neil Armstrong [ Viresh: Fixed commit log and a comment in code ] Signed-off-by: Viresh Kumar

Merge tag 'pm-6.13-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2024-11-27T22:40:33Z

Pull morepower management updates from Rafael Wysocki: "These update the OPP (Operating Performance Points) DT bindings for ti-cpu (Dhruva Gole) and remove unused declarations from the OPP header file (Zhang Zekun)" * tag 'pm-6.13-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: dt-bindings: opp: operating-points-v2-ti-cpu: Describe opp-supported-hw OPP: Remove unused declarations in header file

Merge tag 'opp-updates-6.13' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2024-11-19T20:37:56Z

Merge OPP (Operating Performance Points) Updates for 6.13 from Viresh Kumar: "- Describe opp-supported-hw property for ti-cpu (Dhruva Gole). - Remove unused declarations in header file (Zhang Zekun)." * tag 'opp-updates-6.13' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: dt-bindings: opp: operating-points-v2-ti-cpu: Describe opp-supported-hw OPP: Remove unused declarations in header file