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/hwspinlock/Kconfig | 56 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 drivers/hwspinlock/Kconfig (limited to 'drivers/hwspinlock/Kconfig') diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig new file mode 100644 index 000000000..d84e00084 --- /dev/null +++ b/drivers/hwspinlock/Kconfig @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Generic HWSPINLOCK framework +# + +menuconfig HWSPINLOCK + bool "Hardware Spinlock drivers" + +if HWSPINLOCK + +config HWSPINLOCK_OMAP + tristate "OMAP Hardware Spinlock device" + depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX || SOC_AM33XX || SOC_AM43XX || ARCH_K3 || COMPILE_TEST + help + Say y here to support the OMAP Hardware Spinlock device (firstly + introduced in OMAP4). + + If unsure, say N. + +config HWSPINLOCK_QCOM + tristate "Qualcomm Hardware Spinlock device" + depends on ARCH_QCOM || COMPILE_TEST + select MFD_SYSCON + help + Say y here to support the Qualcomm Hardware Mutex functionality, which + provides a synchronisation mechanism for the various processors on + the SoC. + + If unsure, say N. + +config HWSPINLOCK_SPRD + tristate "SPRD Hardware Spinlock device" + depends on ARCH_SPRD || COMPILE_TEST + help + Say y here to support the SPRD Hardware Spinlock device. + + If unsure, say N. + +config HWSPINLOCK_STM32 + tristate "STM32 Hardware Spinlock device" + depends on MACH_STM32MP157 || COMPILE_TEST + help + Say y here to support the STM32 Hardware Spinlock device. + + If unsure, say N. + +config HWSPINLOCK_SUN6I + tristate "SUN6I Hardware Spinlock device" + depends on ARCH_SUNXI || COMPILE_TEST + help + Say y here to support the SUN6I Hardware Spinlock device which can be + found in most of the sun6i compatible Allwinner SoCs. + + If unsure, say N. + +endif # HWSPINLOCK -- cgit v1.3.1