kernel/linux.git/arch/powerpc/platforms, branch v6.12.91

powerpc/warp: Fix error handling in pika_dtm_thread

2026-05-23T11:05:00+00:00

commit 108d7f951271cbd36ca36efc5e5d106966f5180c upstream. pika_dtm_thread() acquires client through of_find_i2c_device_by_node() but fails to release it in error handling path. This could result in a reference count leak, preventing proper cleanup and potentially leading to resource exhaustion. Add put_device() to release the reference in the error handling path. Found by code review. Cc: stable@vger.kernel.org Fixes: 3984114f0562 ("powerpc/warp: Platform fix for i2c change") Signed-off-by: Ma Ke Reviewed-by: Christophe Leroy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20251116024411.21968-1-make24@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman

fdget(), trivial conversions

2026-05-23T11:04:35+00:00

[ Upstream commit 6348be02eead77bdd1562154ed6b3296ad3b3750 ] fdget() is the first thing done in scope, all matching fdput() are immediately followed by leaving the scope. Reviewed-by: Christian Brauner Signed-off-by: Al Viro Stable-dep-of: 66052a768d47 ("fanotify: call fanotify_events_supported() before path_permission() and security_path_notify()") Signed-off-by: Sasha Levin

dma-mapping: drop unneeded includes from dma-mapping.h

2026-05-14T13:29:28+00:00

[ Upstream commit be164349e173a8e71cd76f17c7ed720813b8d69b ] Back in the day a lot of logic was implemented inline in dma-mapping.h and needed various includes. Move of this has long been moved out of line, so we can drop various includes to improve kernel rebuild times. Signed-off-by: Christoph Hellwig Stable-dep-of: 3023c050af36 ("hwmon: (powerz) Avoid cacheline sharing for DMA buffer") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

powerpc: 83xx: km83xx: Fix keymile vendor prefix

2026-03-25T10:08:26+00:00

[ Upstream commit 691417ffe7821721e0a28bd25ad8c0dc0d4ae4ad ] When kmeter.c was refactored into km83xx.c in 2011, the "keymile" vendor prefix was changed to upper-case "Keymile". The devicetree at arch/powerpc/boot/dts/kmeter1.dts never underwent the same change, suggesting that this was simply a mistake. Fixes: 93e2b95c81042d ("powerpc/83xx: rename and update kmeter1") Signed-off-by: J. Neuschäfer Reviewed-by: Heiko Schocher Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260303-keymile-v1-1-463a11e71702@posteo.net Signed-off-by: Sasha Levin

powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages

2026-01-08T09:15:05+00:00

[ Upstream commit 0da2ba35c0d532ca0fe7af698b17d74c4d084b9a ] Let's properly adjust BALLOON_MIGRATE like the other drivers. Note that the INFLATE/DEFLATE events are triggered from the core when enqueueing/dequeueing pages. This was found by code inspection. Link: https://lkml.kernel.org/r/20251021100606.148294-3-david@redhat.com Fixes: fe030c9b85e6 ("powerpc/pseries/cmm: Implement balloon compaction") Signed-off-by: David Hildenbrand Reviewed-by: Ritesh Harjani (IBM) Cc: Christophe Leroy Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

mm/balloon_compaction: convert balloon_page_delete() to balloon_page_finalize()

2026-01-08T09:15:05+00:00

[ Upstream commit 15504b1163007bbfbd9a63460d5c14737c16e96d ] Let's move the removal of the page from the balloon list into the single caller, to remove the dependency on the PG_isolated flag and clarify locking requirements. Note that for now, balloon_page_delete() was used on two paths: (1) Removing a page from the balloon for deflation through balloon_page_list_dequeue() (2) Removing an isolated page from the balloon for migration in the per-driver migration handlers. Isolated pages were already removed from the balloon list during isolation. So instead of relying on the flag, we can just distinguish both cases directly and handle it accordingly in the caller. We'll shuffle the operations a bit such that they logically make more sense (e.g., remove from the list before clearing flags). In balloon migration functions we can now move the balloon_page_finalize() out of the balloon lock and perform the finalization just before dropping the balloon reference. Document that the page lock is currently required when modifying the movability aspects of a page; hopefully we can soon decouple this from the page lock. Link: https://lkml.kernel.org/r/20250704102524.326966-3-david@redhat.com Signed-off-by: David Hildenbrand Reviewed-by: Lorenzo Stoakes Cc: Alistair Popple Cc: Al Viro Cc: Arnd Bergmann Cc: Brendan Jackman Cc: Byungchul Park Cc: Chengming Zhou Cc: Christian Brauner Cc: Christophe Leroy Cc: Eugenio Pé rez Cc: Greg Kroah-Hartman Cc: Gregory Price Cc: Harry Yoo Cc: "Huang, Ying" Cc: Jan Kara Cc: Jason Gunthorpe Cc: Jason Wang Cc: Jerrin Shaji George Cc: Johannes Weiner Cc: John Hubbard Cc: Jonathan Corbet Cc: Joshua Hahn Cc: Liam Howlett Cc: Madhavan Srinivasan Cc: Mathew Brost Cc: Matthew Wilcox (Oracle) Cc: Miaohe Lin Cc: Michael Ellerman Cc: "Michael S. Tsirkin" Cc: Michal Hocko Cc: Mike Rapoport Cc: Minchan Kim Cc: Naoya Horiguchi Cc: Nicholas Piggin Cc: Oscar Salvador Cc: Peter Xu Cc: Qi Zheng Cc: Rakie Kim Cc: Rik van Riel Cc: Sergey Senozhatsky Cc: Shakeel Butt Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Xuan Zhuo Cc: xu xin Cc: Zi Yan Signed-off-by: Andrew Morton Stable-dep-of: 0da2ba35c0d5 ("powerpc/pseries/cmm: adjust BALLOON_MIGRATE when migrating pages") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

powerpc/pseries/cmm: call balloon_devinfo_init() also without CONFIG_BALLOON_COMPACTION

2026-01-08T09:14:44+00:00

commit fc6bcf9ac4de76f5e7bcd020b3c0a86faff3f2d5 upstream. Patch series "powerpc/pseries/cmm: two smaller fixes". Two smaller fixes identified while doing a bigger rework. This patch (of 2): We always have to initialize the balloon_dev_info, even when compaction is not configured in: otherwise the containing list and the lock are left uninitialized. Likely not many such configs exist in practice, but let's CC stable to be sure. This was found by code inspection. Link: https://lkml.kernel.org/r/20251021100606.148294-1-david@redhat.com Link: https://lkml.kernel.org/r/20251021100606.148294-2-david@redhat.com Fixes: fe030c9b85e6 ("powerpc/pseries/cmm: Implement balloon compaction") Signed-off-by: David Hildenbrand Reviewed-by: Ritesh Harjani (IBM) Cc: Christophe Leroy Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

powerpc/pseries/msi: Fix potential underflow and leak issue

2025-10-19T14:33:52+00:00

commit 3443ff3be6e59b80d74036bb39f5b6409eb23cc9 upstream. pseries_irq_domain_alloc() allocates interrupts at parent's interrupt domain. If it fails in the progress, all allocated interrupts are freed. The number of successfully allocated interrupts so far is stored "i". However, "i - 1" interrupts are freed. This is broken: - One interrupt is not be freed - If "i" is zero, "i - 1" wraps around Correct the number of freed interrupts to 'i'. Fixes: a5f3d2c17b07 ("powerpc/pseries/pci: Add MSI domains") Signed-off-by: Nam Cao Cc: stable@vger.kernel.org Reviewed-by: Cédric Le Goater Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/a980067f2b256bf716b4cd713bc1095966eed8cd.1754300646.git.namcao@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/powernv/pci: Fix underflow and leak issue

2025-10-19T14:33:52+00:00

commit a39087905af9ffecaa237a918a2c03a04e479934 upstream. pnv_irq_domain_alloc() allocates interrupts at parent's interrupt domain. If it fails in the progress, all allocated interrupts are freed. The number of successfully allocated interrupts so far is stored "i". However, "i - 1" interrupts are freed. This is broken: - One interrupt is not be freed - If "i" is zero, "i - 1" wraps around Correct the number of freed interrupts to "i". Fixes: 0fcfe2247e75 ("powerpc/powernv/pci: Add MSI domains") Signed-off-by: Nam Cao Cc: stable@vger.kernel.org Reviewed-by: Cédric Le Goater Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/70f8debe8688e0b467367db769b71c20146a836d.1754300646.git.namcao@linutronix.de Signed-off-by: Greg Kroah-Hartman

(powerpc/512) Fix possible `dma_unmap_single()` on uninitialized pointer

2025-08-20T16:30:33+00:00

[ Upstream commit 760b9b4f6de9a33ca56a05f950cabe82138d25bd ] If the device configuration fails (if `dma_dev->device_config()`), `sg_dma_address(&sg)` is not initialized and the jump to `err_dma_prep` leads to calling `dma_unmap_single()` on `sg_dma_address(&sg)`. Signed-off-by: Thomas Fourier Reviewed-by: Christophe Leroy Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250610142918.169540-2-fourier.thomas@gmail.com Signed-off-by: Sasha Levin