kernel/linux.git/drivers/dma/idxd, branch v6.18.22

dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()

2026-04-02T11:23:31+00:00

[ Upstream commit e1c9866173c5f8521f2d0768547a01508cb9ff27 ] At the end of this function, d is the traversal cursor of flist, but the code completes found instead. This can lead to issues such as NULL pointer dereferences, double completion, or descriptor leaks. Fix this by completing d instead of found in the final list_for_each_entry_safe() loop. Fixes: aa8d18becc0c ("dmaengine: idxd: add callback support for iaa crypto") Signed-off-by: Tuo Li Reviewed-by: Dave Jiang Link: https://patch.msgid.link/20260106032428.162445-1-islituo@gmail.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix leaking event log memory

2026-04-02T11:23:30+00:00

[ Upstream commit ee66bc29578391c9b48523dc9119af67bd5c7c0f ] During the device remove process, the device is reset, causing the configuration registers to go back to their default state, which is zero. As the driver is checking if the event log support was enabled before deallocating, it will fail if a reset happened before. Do not check if the support was enabled, the check for 'idxd->evl' being valid (only allocated if the HW capability is available) is enough. Fixes: 244da66cda35 ("dmaengine: idxd: setup event log configuration") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-10-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix freeing the allocated ida too late

2026-04-02T11:23:30+00:00

[ Upstream commit c311f5e9248471a950f0a524c2fd736414d98900 ] It can happen that when the cdev .release() is called, the driver already called ida_destroy(). Move ida_free() to the _del() path. We see with DEBUG_KOBJECT_RELEASE enabled and forcing an early PCI unbind. Fixes: 04922b7445a1 ("dmaengine: idxd: fix cdev setup and free device lifetime issues") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-9-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix memory leak when a wq is reset

2026-04-02T11:23:30+00:00

[ Upstream commit d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478 ] idxd_wq_disable_cleanup() which is called from the reset path for a workqueue, sets the wq type to NONE, which for other parts of the driver mean that the wq is empty (all its resources were released). Only set the wq type to NONE after its resources are released. Fixes: da32b28c95a7 ("dmaengine: idxd: cleanup workqueue config after disabling") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-8-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix not releasing workqueue on .release()

2026-04-02T11:23:30+00:00

[ Upstream commit 3d33de353b1ff9023d5ec73b9becf80ea87af695 ] The workqueue associated with an DSA/IAA device is not released when the object is freed. Fixes: 47c16ac27d4c ("dmaengine: idxd: fix idxd conf_dev 'struct device' lifetime") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-7-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix possible invalid memory access after FLR

2026-04-02T11:23:30+00:00

[ Upstream commit d6077df7b75d26e4edf98983836c05d00ebabd8d ] In the case that the first Function Level Reset (FLR) concludes correctly, but in the second FLR the scratch area for the saved configuration cannot be allocated, it's possible for a invalid memory access to happen. Always set the deallocated scratch area to NULL after FLR completes. Fixes: 98d187a98903 ("dmaengine: idxd: Enable Function Level Reset (FLR) for halt") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-3-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: Fix crash when the event log is disabled

2026-04-02T11:23:30+00:00

[ Upstream commit 52d2edea0d63c935e82631e4b9e4a94eccf97b5b ] If reporting errors to the event log is not supported by the hardware, and an error that causes Function Level Reset (FLR) is received, the driver will try to restore the event log even if it was not allocated. Also, only try to free the event log if it was properly allocated. Fixes: 6078a315aec1 ("dmaengine: idxd: Add idxd_device_config_save() and idxd_device_config_restore() helpers") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-2-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: idxd: fix device leaks on compat bind and unbind

2026-01-23T10:21:33+00:00

commit 799900f01792cf8b525a44764f065f83fcafd468 upstream. Make sure to drop the reference taken when looking up the idxd device as part of the compat bind and unbind sysfs interface. Fixes: 6e7f3ee97bbe ("dmaengine: idxd: move dsa_drv support to compatible mode") Cc: stable@vger.kernel.org # 5.15 Cc: Dave Jiang Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20251117161258.10679-7-johan@kernel.org Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman

Merge tag 'dmaengine-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

2025-10-06T17:37:06+00:00

Pull dmaengine updates from Vinod Koul: "A couple of new device support and small driver updates for this round. New support: - Intel idxd Wildcat Lake family support - SpacemiT K1 PDMA controller support - Renesas RZ/G3E family support Updates: - Xilinx shutdown support and dma client properties update - Designware edma callback_result support" * tag 'dmaengine-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: dt-bindings: dma: rz-dmac: Document RZ/G3E family of SoCs dmaengine: dw-edma: Set status for callback_result dmaengine: mv_xor: match alloc_wc and free_wc dmaengine: mmp_pdma: Add SpacemiT K1 PDMA support with 64-bit addressing dmaengine: mmp_pdma: Add operations structure for controller abstraction dmaengine: mmp_pdma: Add reset controller support dmaengine: mmp_pdma: Add clock support dt-bindings: dma: Add SpacemiT K1 PDMA controller dt-bindings: dmaengine: xilinx_dma: Remove DMA client properties dmaengine: Fix dma_async_tx_descriptor->tx_submit documentation dmaengine: xilinx_dma: Support descriptor setup from dma_vecs dmaengine: sh: setup_xref error handling dmaengine: Replace zero-length array with flexible-array dmaengine: ppc4xx: Remove space before newline dmaengine: idxd: Add a new IAA device ID for Wildcat Lake family platforms dmaengine: idxd: Replace memset(0) + strscpy() with strscpy_pad() dt-bindings: dma: nvidia,tegra20-apbdma: Add undocumented compatibles and "clock-names" dmaengine: zynqmp_dma: Add shutdown operation support

Merge tag 'vfio-v6.18-rc1' of https://github.com/awilliam/linux-vfio

2025-10-04T15:24:54+00:00

Pull VFIO updates from Alex Williamson: - Use fdinfo to expose the sysfs path of a device represented by a vfio device file (Alex Mastro) - Mark vfio-fsl-mc, vfio-amba, and the reset functions for vfio-platform for removal as these are either orphaned or believed to be unused (Alex Williamson) - Add reviewers for vfio-platform to save it from also being marked for removal (Mostafa Saleh, Pranjal Shrivastava) - VFIO selftests, including basic sanity testing and minimal userspace drivers for testing against real hardware. This is also expected to provide integration with KVM selftests for KVM-VFIO interfaces (David Matlack, Josh Hilke) - Fix drivers/cdx and vfio/cdx to build without CONFIG_GENERIC_MSI_IRQ (Nipun Gupta) - Fix reference leak in hisi_acc (Miaoqian Lin) - Use consistent return for unsupported device feature (Alex Mastro) - Unwind using the correct memory free callback in vfio/pds (Zilin Guan) - Use IRQ_DISABLE_LAZY flag to improve handling of pre-PCI2.3 INTx and resolve stalled interrupt on ppc64 (Timothy Pearson) - Enable GB300 in nvgrace-gpu vfio-pci variant driver (Tushar Dave) - Misc: - Drop unnecessary ternary conversion in vfio/pci (Xichao Zhao) - Grammatical fix in nvgrace-gpu (Morduan Zang) - Update Shameer's email address (Shameer Kolothum) - Fix document build warning (Alex Williamson) * tag 'vfio-v6.18-rc1' of https://github.com/awilliam/linux-vfio: (48 commits) vfio/nvgrace-gpu: Add GB300 SKU to the devid table vfio/pci: Fix INTx handling on legacy non-PCI 2.3 devices vfio/pds: replace bitmap_free with vfree vfio: return -ENOTTY for unsupported device feature hisi_acc_vfio_pci: Fix reference leak in hisi_acc_vfio_debug_init vfio/platform: Mark reset drivers for removal vfio/amba: Mark for removal MAINTAINERS: Add myself as VFIO-platform reviewer MAINTAINERS: Add myself as VFIO-platform reviewer docs: proc.rst: Fix VFIO Device title formatting vfio: selftests: Fix .gitignore for already tracked files vfio/cdx: update driver to build without CONFIG_GENERIC_MSI_IRQ cdx: don't select CONFIG_GENERIC_MSI_IRQ MAINTAINERS: Update Shameer Kolothum's email address vfio: selftests: Add a script to help with running VFIO selftests vfio: selftests: Make iommufd the default iommu_mode vfio: selftests: Add iommufd mode vfio: selftests: Add iommufd_compat_type1{,v2} modes vfio: selftests: Add vfio_type1v2_mode vfio: selftests: Replicate tests across all iommu_modes ...