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| author |   Zeng Heng <zengheng4@huawei.com> | 2025-06-03 20:58:28 +0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2025-06-04 20:32:55 +0200 |
| commit | dd2922dcfaa3296846265e113309e5f7f138839f (patch) | |
| tree | 32dd9bee1ad91881ddcb9a0d2572c9f88596d106 /net/lapb/lapb_timer.c | |
| parent | x86/iopl: Cure TIF_IO_BITMAP inconsistencies (diff) | |
| download | linux-rng-dd2922dcfaa3296846265e113309e5f7f138839f.tar.xz linux-rng-dd2922dcfaa3296846265e113309e5f7f138839f.zip | |
fs/resctrl: Restore the rdt_last_cmd_clear() calls after acquiring rdtgroup_mutex
A lockdep fix removed two rdt_last_cmd_clear() calls that were used to
clear the last_cmd_status buffer but called without holding the required
rdtgroup_mutex.
The impacted resctrl commands are writing to the cpus or cpus_list files
and creating a new monitor or control group. With stale data in the
last_cmd_status buffer the impacted resctrl commands report the stale error
on success, or append its own failure message to the stale error on
failure.
Consequently, restore the rdt_last_cmd_clear() calls after acquiring
rdtgroup_mutex.
Fixes: c8eafe149530 ("x86/resctrl: Fix potential lockdep warning")
Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/all/20250603125828.1590067-1-zengheng4@huawei.com
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions