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| author | Zeng Heng <[email protected]> | 2025-06-03 12:58:28 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2025-06-04 18:32:55 +0000 |
| commit | dd2922dcfaa3296846265e113309e5f7f138839f (patch) | |
| tree | 32dd9bee1ad91881ddcb9a0d2572c9f88596d106 /drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | |
| parent | x86/iopl: Cure TIF_IO_BITMAP inconsistencies (diff) | |
| download | kernel-dd2922dcfaa3296846265e113309e5f7f138839f.tar.gz kernel-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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c')
0 files changed, 0 insertions, 0 deletions