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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c8eafe1495
rdtgroup_cpus_write() and mkdir_rdt_prepare() call
rdtgroup_kn_lock_live() -> kernfs_to_rdtgroup() to get 'rdtgrp', and
then call the rdt_last_cmd_{clear,puts,...}() functions which will check
if rdtgroup_mutex is held/requires its caller to hold rdtgroup_mutex.
But if 'rdtgrp' returned from kernfs_to_rdtgroup() is NULL,
rdtgroup_mutex is not held and calling rdt_last_cmd_{clear,puts,...}()
will result in a self-incurred, potential lockdep warning.
Remove the rdt_last_cmd_{clear,puts,...}() calls in these two paths.
Just returning error should be sufficient to report to the user that the
entry doesn't exist any more.
[ bp: Massage. ]
Fixes:
|
||
|---|---|---|
| .. | ||
| core.c | ||
| ctrlmondata.c | ||
| internal.h | ||
| Makefile | ||
| monitor.c | ||
| pseudo_lock_event.h | ||
| pseudo_lock.c | ||
| rdtgroup.c | ||