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 --- Documentation/ABI/testing/sysfs-class-vduse | 33 +++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-vduse (limited to 'Documentation/ABI/testing/sysfs-class-vduse') diff --git a/Documentation/ABI/testing/sysfs-class-vduse b/Documentation/ABI/testing/sysfs-class-vduse new file mode 100644 index 000000000..2f2bc5c8f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-vduse @@ -0,0 +1,33 @@ +What: /sys/class/vduse/ +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + The vduse/ class sub-directory belongs to the VDUSE + framework and provides a sysfs interface for configuring + VDUSE devices. + +What: /sys/class/vduse/control/ +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + This directory entry is created for the control device + of VDUSE framework. + +What: /sys/class/vduse// +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + This directory entry is created when a VDUSE device is + created via the control device. + +What: /sys/class/vduse//msg_timeout +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + (RW) The timeout (in seconds) for waiting for the control + message's response from userspace. Default value is 30s. + Writing a '0' to the file means to disable the timeout. -- cgit v1.3.1