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| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2026-09-03 10:43:25 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-09-10 18:05:43 -0700 |
| commit | 27600805e62f800bacf990354632eae4e487d34c (patch) | |
| tree | e8aec0ddfaa0bc264d79af632e3de3f1b75ae4c8 /samples/bpf/hbm.h | |
| download | linux-stable-27600805e62f800bacf990354632eae4e487d34c.tar.gz linux-stable-27600805e62f800bacf990354632eae4e487d34c.zip | |
x86/amd_node: Fix PCI device reference counting in amd_smn_init()grafted
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 <sashiko-bot@kernel.org>
Assisted-by: LLM
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Cc: <stable@kernel.org>
Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com
Diffstat (limited to 'samples/bpf/hbm.h')
| -rw-r--r-- | samples/bpf/hbm.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/samples/bpf/hbm.h b/samples/bpf/hbm.h new file mode 100644 index 000000000..f0963ed6a --- /dev/null +++ b/samples/bpf/hbm.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2019 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * Include file for Host Bandwidth Management (HBM) programs + */ +struct hbm_vqueue { + struct bpf_spin_lock lock; + /* 4 byte hole */ + unsigned long long lasttime; /* In ns */ + int credit; /* In bytes */ + unsigned int rate; /* In bytes per NS << 20 */ +}; + +struct hbm_queue_stats { + unsigned long rate; /* in Mbps*/ + unsigned long stats:1, /* get HBM stats (marked, dropped,..) */ + loopback:1, /* also limit flows using loopback */ + no_cn:1; /* do not use cn flags */ + unsigned long long pkts_marked; + unsigned long long bytes_marked; + unsigned long long pkts_dropped; + unsigned long long bytes_dropped; + unsigned long long pkts_total; + unsigned long long bytes_total; + unsigned long long firstPacketTime; + unsigned long long lastPacketTime; + unsigned long long pkts_ecn_ce; + unsigned long long returnValCount[4]; + unsigned long long sum_cwnd; + unsigned long long sum_rtt; + unsigned long long sum_cwnd_cnt; + long long sum_credit; +}; |