From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- drivers/hte/Kconfig | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 drivers/hte/Kconfig (limited to 'drivers/hte/Kconfig') diff --git a/drivers/hte/Kconfig b/drivers/hte/Kconfig new file mode 100644 index 000000000..f57bad67d --- /dev/null +++ b/drivers/hte/Kconfig @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig HTE + bool "Hardware Timestamping Engine (HTE) Support" + help + Hardware Timestamping Engine (HTE) Support. + + Some devices provide a hardware timestamping engine which can + timestamp certain device lines/signals in realtime. It comes with a + benefit for the applications needing accurate timestamping event with + less jitter. This framework provides a generic interface to such HTE + providers and consumer devices. + + If unsure, say no. + +if HTE + +config HTE_TEGRA194 + tristate "NVIDIA Tegra194 HTE Support" + depends on (ARCH_TEGRA || COMPILE_TEST) + depends on GPIOLIB + help + Enable this option for integrated hardware timestamping engine also + known as generic timestamping engine (GTE) support on NVIDIA Tegra194 + and later systems-on-chip. The driver supports 352 LIC IRQs and 39 + AON GPIOs lines for timestamping in realtime. + +config HTE_TEGRA194_TEST + tristate "NVIDIA Tegra194 HTE Test" + depends on (HTE_TEGRA194 || COMPILE_TEST) + help + The NVIDIA Tegra194 GTE test driver demonstrates how to use HTE + framework to timestamp GPIO and LIC IRQ lines. + +endif -- cgit v1.3.1