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/ssb/Kconfig | 168 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 drivers/ssb/Kconfig (limited to 'drivers/ssb/Kconfig') diff --git a/drivers/ssb/Kconfig b/drivers/ssb/Kconfig new file mode 100644 index 000000000..1cf1a9895 --- /dev/null +++ b/drivers/ssb/Kconfig @@ -0,0 +1,168 @@ +# SPDX-License-Identifier: GPL-2.0-only +config SSB_POSSIBLE + bool + depends on HAS_IOMEM && HAS_DMA + default y + +menuconfig SSB + tristate "Sonics Silicon Backplane support" + depends on SSB_POSSIBLE + help + Support for the Sonics Silicon Backplane bus. + You only need to enable this option, if you are + configuring a kernel for an embedded system with + this bus. + It will be auto-selected if needed in other + environments. + + The module will be called ssb. + + If unsure, say N. + +if SSB + +# Common SPROM support routines +config SSB_SPROM + bool + +# Support for Block-I/O. SELECT this from the driver that needs it. +config SSB_BLOCKIO + bool + depends on SSB + +config SSB_PCIHOST_POSSIBLE + bool + depends on SSB && (PCI = y || PCI = SSB) && (PCI_DRIVERS_LEGACY || !MIPS) + default y + +config SSB_PCIHOST + bool "Support for SSB on PCI-bus host" + depends on SSB_PCIHOST_POSSIBLE + select SSB_SPROM + default y + help + Support for a Sonics Silicon Backplane on top + of a PCI device. + + If unsure, say Y + +config SSB_B43_PCI_BRIDGE + bool + depends on SSB_PCIHOST + default n + +config SSB_PCMCIAHOST_POSSIBLE + bool + depends on SSB && (PCMCIA = y || PCMCIA = SSB) + default y + +config SSB_PCMCIAHOST + bool "Support for SSB on PCMCIA-bus host" + depends on SSB_PCMCIAHOST_POSSIBLE + select SSB_SPROM + help + Support for a Sonics Silicon Backplane on top + of a PCMCIA device. + + If unsure, say N + +config SSB_SDIOHOST_POSSIBLE + bool + depends on SSB && (MMC = y || MMC = SSB) + default y + +config SSB_SDIOHOST + bool "Support for SSB on SDIO-bus host" + depends on SSB_SDIOHOST_POSSIBLE + help + Support for a Sonics Silicon Backplane on top + of a SDIO device. + + If unsure, say N + +config SSB_HOST_SOC + bool "Support for SSB bus on SoC" + depends on SSB && BCM47XX_NVRAM + select SSB_SPROM + help + Host interface for a SSB directly mapped into memory. This is + for some Broadcom SoCs from the BCM47xx and BCM53xx lines. + + If unsure, say N + +config SSB_SERIAL + bool + depends on SSB + # ChipCommon and ExtIf serial support routines. + +config SSB_DRIVER_PCICORE_POSSIBLE + bool + depends on SSB_PCIHOST + default y + +config SSB_DRIVER_PCICORE + bool "SSB PCI core driver" + depends on SSB_DRIVER_PCICORE_POSSIBLE + help + Driver for the Sonics Silicon Backplane attached + Broadcom PCI core. + + If unsure, say Y + +config SSB_PCICORE_HOSTMODE + bool "Hostmode support for SSB PCI core" + depends on SSB_DRIVER_PCICORE && SSB_DRIVER_MIPS && SSB = y + help + PCIcore hostmode operation (external PCI bus). + +config SSB_DRIVER_MIPS + bool "SSB Broadcom MIPS core driver" + depends on SSB && MIPS + select SSB_SERIAL + select SSB_SFLASH + help + Driver for the Sonics Silicon Backplane attached + Broadcom MIPS core. + + If unsure, say N + +config SSB_SFLASH + bool "SSB serial flash support" + depends on SSB_DRIVER_MIPS + default y + +# Assumption: We are on embedded, if we compile the MIPS core. +config SSB_EMBEDDED + bool + depends on SSB_DRIVER_MIPS + depends on PCI=n || SSB_PCICORE_HOSTMODE + default y + +config SSB_DRIVER_EXTIF + bool "SSB Broadcom EXTIF core driver" + depends on SSB_DRIVER_MIPS + help + Driver for the Sonics Silicon Backplane attached + Broadcom EXTIF core. + + If unsure, say N + +config SSB_DRIVER_GIGE + bool "SSB Broadcom Gigabit Ethernet driver" + depends on SSB_PCIHOST_POSSIBLE && SSB_EMBEDDED && MIPS + help + Driver for the Sonics Silicon Backplane attached + Broadcom Gigabit Ethernet. + + If unsure, say N + +config SSB_DRIVER_GPIO + bool "SSB GPIO driver" + depends on SSB && GPIOLIB + select IRQ_DOMAIN if SSB_EMBEDDED + help + Driver to provide access to the GPIO pins on the bus. + + If unsure, say N + +endif # SSB -- cgit v1.3.1