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| author | Rui Zhang <zr.zhang@vivo.com> | 2022-12-01 11:38:06 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-12-01 11:41:19 +0000 |
| commit | 0591b14ce0398125439c759f889647369aa616a0 (patch) | |
| tree | c62333a4f76f1b4555f0491dd08b41460c4da161 /lib/test_fortify/write_overflow_field-memset.c | |
| parent | f39f8709c217d82aabbf51d8669731137ce09aea (diff) | |
regulator: core: fix use_count leakage when handling boot-on
I found a use_count leakage towards supply regulator of rdev with
boot-on option.
┌───────────────────┐ ┌───────────────────┐
│ regulator_dev A │ │ regulator_dev B │
│ (boot-on) │ │ (boot-on) │
│ use_count=0 │◀──supply──│ use_count=1 │
│ │ │ │
└───────────────────┘ └───────────────────┘
In case of rdev(A) configured with `regulator-boot-on', the use_count
of supplying regulator(B) will increment inside
regulator_enable(rdev->supply).
Thus, B will acts like always-on, and further balanced
regulator_enable/disable cannot actually disable it anymore.
However, B was also configured with `regulator-boot-on', we wish it
could be disabled afterwards.
Signed-off-by: Rui Zhang <zr.zhang@vivo.com>
Link: https://lore.kernel.org/r/20221201033806.2567812-1-zr.zhang@vivo.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'lib/test_fortify/write_overflow_field-memset.c')
0 files changed, 0 insertions, 0 deletions