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/hid/hid-nti.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 drivers/hid/hid-nti.c (limited to 'drivers/hid/hid-nti.c') diff --git a/drivers/hid/hid-nti.c b/drivers/hid/hid-nti.c new file mode 100644 index 000000000..03f7dd491 --- /dev/null +++ b/drivers/hid/hid-nti.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * USB HID quirks support for Network Technologies, Inc. "USB-SUN" USB + * adapter for pre-USB Sun keyboards + * + * Copyright (c) 2011 Google, Inc. + * + * Based on HID apple driver by + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik + * Copyright (c) 2005 Michael Haboustak for Concept2, Inc + * Copyright (c) 2006-2007 Jiri Kosina + * Copyright (c) 2008 Jiri Slaby + */ + +/* + */ + +#include +#include +#include +#include + +#include "hid-ids.h" + +MODULE_AUTHOR("Jonathan Klabunde Tomer "); +MODULE_DESCRIPTION("HID driver for Network Technologies USB-SUN keyboard adapter"); + +/* + * NTI Sun keyboard adapter has wrong logical maximum in report descriptor + */ +static const __u8 *nti_usbsun_report_fixup(struct hid_device *hdev, __u8 *rdesc, + unsigned int *rsize) +{ + if (*rsize >= 60 && rdesc[53] == 0x65 && rdesc[59] == 0x65) { + hid_info(hdev, "fixing up NTI USB-SUN keyboard adapter report descriptor\n"); + rdesc[53] = rdesc[59] = 0xe7; + } + return rdesc; +} + +static const struct hid_device_id nti_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_NTI, USB_DEVICE_ID_USB_SUN) }, + { } +}; +MODULE_DEVICE_TABLE(hid, nti_devices); + +static struct hid_driver nti_driver = { + .name = "nti", + .id_table = nti_devices, + .report_fixup = nti_usbsun_report_fixup +}; + +module_hid_driver(nti_driver); + +MODULE_LICENSE("GPL"); -- cgit v1.3.1