linux/drivers/misc/cxl, branch master

cxl: Remove driver

2025-03-16T11:04:27Z

Remove the cxl driver that provides support for the IBM Coherent Accelerator Processor Interface. Revert or clean up associated code in arch/powerpc that is no longer necessary. cxl has received minimal maintenance for several years, and is not supported on the Power10 processor. We aren't aware of any users who are likely to be using recent kernels. Thanks to Mikey Neuling, Ian Munsie, Daniel Axtens, Frederic Barrat, Christophe Lombard, Philippe Bergheaud, Vaibhav Jain and Alastair D'Silva for their work on this driver over the years. Signed-off-by: Andrew Donnellan Acked-by: Frederic Barrat Acked-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/20250219070007.177725-2-ajd@linux.ibm.com

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

2025-01-28T00:51:51Z

Pull Char/Misc/IIO driver updates from Greg KH: "Here is the "big" set of char/misc/iio and other smaller driver subsystem updates for 6.14-rc1. Loads of different things in here this development cycle, highlights are: - ntsync "driver" to handle Windows locking types enabling Wine to work much better on many workloads (i.e. games). The driver framework was in 6.13, but now it's enabled and fully working properly. Should make many SteamOS users happy. Even comes with tests! - Large IIO driver updates and bugfixes - FPGA driver updates - Coresight driver updates - MHI driver updates - PPS driver updatesa - const bin_attribute reworking for many drivers - binder driver updates - smaller driver updates and fixes All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (311 commits) ntsync: Fix reference leaks in the remaining create ioctls. spmi: hisi-spmi-controller: Drop duplicated OF node assignment in spmi_controller_probe() spmi: Set fwnode for spmi devices ntsync: fix a file reference leak in drivers/misc/ntsync.c scripts/tags.sh: Don't tag usages of DECLARE_BITMAP dt-bindings: interconnect: qcom,msm8998-bwmon: Add SM8750 CPU BWMONs dt-bindings: interconnect: OSM L3: Document sm8650 OSM L3 compatible dt-bindings: interconnect: qcom-bwmon: Document QCS615 bwmon compatibles interconnect: sm8750: Add missing const to static qcom_icc_desc memstick: core: fix kernel-doc notation intel_th: core: fix kernel-doc warnings binder: log transaction code on failure iio: dac: ad3552r-hs: clear reset status flag iio: dac: ad3552r-common: fix ad3541/2r ranges iio: chemical: bme680: Fix uninitialized variable in __bme680_read_raw() misc: fastrpc: Fix copy buffer page size misc: fastrpc: Fix registered buffer page address misc: fastrpc: Deregister device nodes properly in error scenarios nvmem: core: improve range check for nvmem_cell_write() nvmem: qcom-spmi-sdam: Set size in struct nvmem_config ...

cxl: Constify 'struct bin_attribute'

2024-12-24T08:36:01Z

The sysfs core now allows instances of 'struct bin_attribute' to be moved into read-only memory. Make use of that to protect them against accidental or malicious modifications. Signed-off-by: Thomas Weißschuh Acked-by: Andrew Donnellan Link: https://lore.kernel.org/r/20241221-sysfs-const-bin_attr-misc-drivers-v2-2-ba5e79fe8771@weissschuh.net Signed-off-by: Greg Kroah-Hartman

cxl: Deprecate driver

2024-12-13T03:45:28Z

The cxl driver is no longer actively maintained and we intend to remove it in a future kernel release. cxl has received minimal maintenance for several years, and is not supported on the Power10 processor. We aren't aware of any users who are likely to be using recent kernels. Change its MAINTAINERS status to obsolete, update the sysfs ABI documentation accordingly, add a warning message on device probe, change the Kconfig options to label it as deprecated, and don't build it by default. Signed-off-by: Andrew Donnellan Acked-by: Frederic Barrat Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20241210054055.144813-2-ajd@linux.ibm.com

Get rid of 'remove_new' relic from platform driver struct

2024-12-01T23:12:43Z

The continual trickle of small conversion patches is grating on me, and is really not helping. Just get rid of the 'remove_new' member function, which is just an alias for the plain 'remove', and had a comment to that effect: /* * .remove_new() is a relic from a prototype conversion of .remove(). * New drivers are supposed to implement .remove(). Once all drivers are * converted to not use .remove_new any more, it will be dropped. */ This was just a tree-wide 'sed' script that replaced '.remove_new' with '.remove', with some care taken to turn a subsequent tab into two tabs to make things line up. I did do some minimal manual whitespace adjustment for places that used spaces to line things up. Then I just removed the old (sic) .remove_new member function, and this is the end result. No more unnecessary conversion noise. Signed-off-by: Linus Torvalds

cxl: Constify struct kobj_type

2024-09-11T14:02:50Z

This 'struct kobj_type' is not modified. It is only used in kobject_init_and_add() which takes a 'const struct kobj_type *ktype' parameter. Constifying this structure and moving it to a read-only section, and can increase over all security. Signed-off-by: Hongbo Li Link: https://lore.kernel.org/r/20240904011951.2010646-1-lihongbo22@huawei.com Signed-off-by: Greg Kroah-Hartman

cxl: Use of_property_ accessor functions

2024-07-31T11:57:05Z

The CXL driver has its own custom implementations of typed DT property accessors. Replace the custom property accessor functions with the common DT property functions. This clean-up is part of a larger effort to remove of_get_property() and other DT functions which leak pointers to DT node and property data. Signed-off-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20240729-dt-cxl-cleanup-v1-2-a75eea80d231@kernel.org Signed-off-by: Greg Kroah-Hartman

cxl: Drop printing of DT properties

2024-07-31T11:57:04Z

There's little reason to dump DT property values when they can be read at any time from the DT in /proc/device-tree. If such a feature is needed, then it really should be implemented in the DT core such that any module/driver can use it. Signed-off-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20240729-dt-cxl-cleanup-v1-1-a75eea80d231@kernel.org Signed-off-by: Greg Kroah-Hartman

cxl: Convert to platform remove callback returning void

2024-03-05T14:28:51Z

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Acked-by: Andrew Donnellan Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/add08320eef9ea20ceca78648370590a4bd447b0.1708508896.git.u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc: Add PVN support for HeXin C2000 processor

2023-12-01T10:15:33Z

HeXin Tech Co. has applied for a new PVN from the OpenPower Community for its new processor C2000. The OpenPower has assigned a new PVN and this newly assigned PVN is 0x0066, add pvr register related support for this PVN. Signed-off-by: Zhao Ke Link: https://discuss.openpower.foundation/t/how-to-get-a-new-pvr-for-processors-follow-power-isa/477/10 Signed-off-by: Michael Ellerman Link: https://msgid.link/20231129075845.57976-1-ke.zhao@shingroup.cn