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/firmware/tegra/Kconfig | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 drivers/firmware/tegra/Kconfig (limited to 'drivers/firmware/tegra/Kconfig') diff --git a/drivers/firmware/tegra/Kconfig b/drivers/firmware/tegra/Kconfig new file mode 100644 index 000000000..3a9162706 --- /dev/null +++ b/drivers/firmware/tegra/Kconfig @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "Tegra firmware driver" + +config TEGRA_IVC + bool + depends on ARCH_TEGRA + help + IVC (Inter-VM Communication) protocol is part of the IPC + (Inter Processor Communication) framework on Tegra. It maintains the + data and the different communication channels in SysRAM or RAM and + keeps the content is synchronization between host CPU and remote + processors. + +config TEGRA_BPMP + bool "Tegra BPMP driver" + depends on ARCH_TEGRA && TEGRA_HSP_MBOX + depends on !CPU_BIG_ENDIAN + select TEGRA_IVC + help + BPMP (Boot and Power Management Processor) is designed to off-loading + the PM functions which include clock/DVFS/thermal/power from the CPU. + It needs HSP as the HW synchronization and notification module and + IVC module as the message communication protocol. + + This driver manages the IPC interface between host CPU and the + firmware running on BPMP. + +endmenu -- cgit v1.3.1