user/sven/linux.git/Documentation, branch v6.1.99

dt-bindings: i2c: atmel,at91sam: correct path to i2c-controller schema

2024-07-05T07:31:44Z

[ Upstream commit d4e001ffeccfc128c715057e866f301ac9b95728 ] The referenced i2c-controller.yaml schema is provided by dtschema package (outside of Linux kernel), so use full path to reference it. Cc: stable@vger.kernel.org Fixes: 7ea75dd386be ("dt-bindings: i2c: convert i2c-at91 to json-schema") Signed-off-by: Krzysztof Kozlowski Reviewed-by: Conor Dooley Signed-off-by: Andi Shyti Signed-off-by: Sasha Levin

dt-bindings: i2c: Drop unneeded quotes

2024-07-05T07:31:44Z

[ Upstream commit fc114c75680da73c3815512d880f69cecc9a9b87 ] Cleanup bindings dropping unneeded quotes. Once all these are fixed, checking for this can be enabled in yamllint. Signed-off-by: Rob Herring Reviewed-by: Krzysztof Kozlowski Reviewed-by: Neil Armstrong Reviewed-by: Nicolas Ferre Reviewed-by: Alain Volmat Signed-off-by: Wolfram Sang Stable-dep-of: d4e001ffeccf ("dt-bindings: i2c: atmel,at91sam: correct path to i2c-controller schema") Signed-off-by: Sasha Levin

dt-bindings: i2c: google,cros-ec-i2c-tunnel: correct path to i2c-controller schema

2024-06-27T11:46:23Z

commit 5c8cfd592bb7632200b4edac8f2c7ec892ed9d81 upstream. The referenced i2c-controller.yaml schema is provided by dtschema package (outside of Linux kernel), so use full path to reference it. Cc: stable@vger.kernel.org Fixes: 1acd4577a66f ("dt-bindings: i2c: convert i2c-cros-ec-tunnel to json-schema") Signed-off-by: Krzysztof Kozlowski Reviewed-by: Conor Dooley Signed-off-by: Andi Shyti Signed-off-by: Greg Kroah-Hartman

mm: fix race between __split_huge_pmd_locked() and GUP-fast

2024-06-16T11:41:38Z

commit 3a5a8d343e1cf96eb9971b17cbd4b832ab19b8e7 upstream. __split_huge_pmd_locked() can be called for a present THP, devmap or (non-present) migration entry. It calls pmdp_invalidate() unconditionally on the pmdp and only determines if it is present or not based on the returned old pmd. This is a problem for the migration entry case because pmd_mkinvalid(), called by pmdp_invalidate() must only be called for a present pmd. On arm64 at least, pmd_mkinvalid() will mark the pmd such that any future call to pmd_present() will return true. And therefore any lockless pgtable walker could see the migration entry pmd in this state and start interpretting the fields as if it were present, leading to BadThings (TM). GUP-fast appears to be one such lockless pgtable walker. x86 does not suffer the above problem, but instead pmd_mkinvalid() will corrupt the offset field of the swap entry within the swap pte. See link below for discussion of that problem. Fix all of this by only calling pmdp_invalidate() for a present pmd. And for good measure let's add a warning to all implementations of pmdp_invalidate[_ad](). I've manually reviewed all other pmdp_invalidate[_ad]() call sites and believe all others to be conformant. This is a theoretical bug found during code review. I don't have any test case to trigger it in practice. Link: https://lkml.kernel.org/r/20240501143310.1381675-1-ryan.roberts@arm.com Link: https://lore.kernel.org/all/0dd7827a-6334-439a-8fd0-43c98e6af22b@arm.com/ Fixes: 84c3fc4e9c56 ("mm: thp: check pmd migration entry in common path") Signed-off-by: Ryan Roberts Reviewed-by: Zi Yan Reviewed-by: Anshuman Khandual Acked-by: David Hildenbrand Cc: Andreas Larsson Cc: Andy Lutomirski Cc: Aneesh Kumar K.V Cc: Borislav Petkov (AMD) Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Dave Hansen Cc: "David S. Miller" Cc: Ingo Molnar Cc: Jonathan Corbet Cc: Mark Rutland Cc: Naveen N. Rao Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Will Deacon Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

net: ena: Add dynamic recycling mechanism for rx buffers

2024-06-12T09:03:58Z

[ Upstream commit f7d625adeb7bc6a9ec83d32d9615889969d64484 ] The current implementation allocates page-sized rx buffers. As traffic may consist of different types and sizes of packets, in various cases, buffers are not fully used. This change (Dynamic RX Buffers - DRB) uses part of the allocated rx page needed for the incoming packet, and returns the rest of the unused page to be used again as an rx buffer for future packets. A threshold of 2K for unused space has been set in order to declare whether the remainder of the page can be reused again as an rx buffer. As a page may be reused, dma_sync_single_for_cpu() is added in order to sync the memory to the CPU side after it was owned by the HW. In addition, when the rx page can no longer be reused, it is being unmapped using dma_page_unmap(), which implicitly syncs and then unmaps the entire page. In case the kernel still handles the skbs pointing to the previous buffers from that rx page, it may access garbage pointers, caused by the implicit sync overwriting them. The implicit dma sync is removed by replacing dma_page_unmap() with dma_unmap_page_attrs() with DMA_ATTR_SKIP_CPU_SYNC flag. The functionality is disabled for XDP traffic to avoid handling several descriptors per packet. Signed-off-by: Arthur Kiyanovski Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon Link: https://lore.kernel.org/r/20230612121448.28829-1-darinzon@amazon.com Signed-off-by: Jakub Kicinski Stable-dep-of: 2dc8b1e7177d ("net: ena: Fix redundant device NUMA node override") Signed-off-by: Sasha Levin

dt-bindings: pinctrl: mediatek: mt7622: fix array properties

2024-06-12T09:03:39Z

[ Upstream commit 61fcbbf3ca038c048c942ce31bb3d3c846c87581 ] Some properties (function groups & pins) are meant to be arrays and should allow multiple entries out of enum sets. Use "items" for those. Mistake was noticed during validation of in-kernel DTS files. Fixes: b9ffc18c6388 ("dt-bindings: mediatek: convert pinctrl to yaml") Signed-off-by: Rafał Miłecki Acked-by: Rob Herring Message-ID: <20240423045502.7778-1-zajec5@gmail.com> Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin

fpga: region: add owner module and take its refcount

2024-06-12T09:03:39Z

[ Upstream commit b7c0e1ecee403a43abc89eb3e75672b01ff2ece9 ] The current implementation of the fpga region assumes that the low-level module registers a driver for the parent device and uses its owner pointer to take the module's refcount. This approach is problematic since it can lead to a null pointer dereference while attempting to get the region during programming if the parent device does not have a driver. To address this problem, add a module owner pointer to the fpga_region struct and use it to take the module's refcount. Modify the functions for registering a region to take an additional owner module parameter and rename them to avoid conflicts. Use the old function names for helper macros that automatically set the module that registers the region as the owner. This ensures compatibility with existing low-level control modules and reduces the chances of registering a region without setting the owner. Also, update the documentation to keep it consistent with the new interface for registering an fpga region. Fixes: 0fa20cdfcc1f ("fpga: fpga-region: device tree control for FPGA") Suggested-by: Greg Kroah-Hartman Suggested-by: Xu Yilun Reviewed-by: Russ Weight Signed-off-by: Marco Pagani Acked-by: Xu Yilun Link: https://lore.kernel.org/r/20240419083601.77403-1-marpagan@redhat.com Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin

dt-bindings: PCI: rcar-pci-host: Add missing IOMMU properties

2024-06-12T09:03:37Z

[ Upstream commit 78d212851f0e56b7d7083c4d5014aa7fa8b77e20 ] make dtbs_check: arch/arm64/boot/dts/renesas/r8a77951-salvator-xs.dtb: pcie@fe000000: Unevaluated properties are not allowed ('iommu-map', 'iommu-map-mask' were unexpected) from schema $id: http://devicetree.org/schemas/pci/rcar-pci-host.yaml# Fix this by adding the missing IOMMU-related properties. [kwilczynski: added missing Fixes: tag] Fixes: 0d69ce3c2c63 ("dt-bindings: PCI: rcar-pci-host: Convert bindings to json-schema") Link: https://lore.kernel.org/linux-pci/babc878a93cb6461a5d39331f8ecfa654dfda921.1706802597.git.geert+renesas@glider.be Signed-off-by: Geert Uytterhoeven Signed-off-by: Krzysztof Wilczyński Acked-by: Conor Dooley Signed-off-by: Sasha Levin

dt-bindings: PCI: rcar-pci-host: Add optional regulators

2024-06-12T09:03:37Z

[ Upstream commit b952f96a57e6fb4528c1d6be19e941c3322f9905 ] Support regulators found on the KingFisher board for miniPCIe (1.5 and 3.3v). For completeness, describe a 12v regulator while we are here. Link: https://lore.kernel.org/linux-pci/20231105092908.3792-2-wsa+renesas@sang-engineering.com Signed-off-by: Wolfram Sang Signed-off-by: Krzysztof Wilczyński Reviewed-by: Geert Uytterhoeven Acked-by: Krzysztof Kozlowski Stable-dep-of: 78d212851f0e ("dt-bindings: PCI: rcar-pci-host: Add missing IOMMU properties") Signed-off-by: Sasha Levin

media: dt-bindings: ovti,ov2680: Fix the power supply names

2024-06-12T09:03:24Z

[ Upstream commit e2f6ea61b6f3e4ebbb7dff857eea6220c18cd17b ] The original .txt bindings had the OV2680 power supply names correct, but the transition from .txt to yaml spelled them incorrectly. Fix the OV2680 power supply names as the original .txt bindings as these are the names used by the OV2680 driver and in devicetree. Fixes: 57226cd8c8bf ("media: dt-bindings: ov2680: convert bindings to yaml") Signed-off-by: Fabio Estevam Reviewed-by: Rob Herring Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin