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authorHsin-Yi Wang <hsinyi@chromium.org>2022-07-05 20:16:49 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2022-07-14 21:50:06 +0300
commit37101d3c719386040ded735a5ec06974f1d94d1f (patch)
tree3e9afdc7ed27cfc5f8f5d6754fe31765f219c356 /kernel/power
parent32346491ddf24599decca06190ebca03ff9de7f8 (diff)
PM: domains: Ensure genpd_debugfs_dir exists before remove
Both genpd_debug_add() and genpd_debug_remove() may be called indirectly by other drivers while genpd_debugfs_dir is not yet set. For example, drivers can call pm_genpd_init() in probe or pm_genpd_init() in probe fail/cleanup path: pm_genpd_init() --> genpd_debug_add() pm_genpd_remove() --> genpd_remove() --> genpd_debug_remove() At this time, genpd_debug_init() may not yet be called. genpd_debug_add() checks that if genpd_debugfs_dir is NULL, it will return directly. Make sure this is also checked in pm_genpd_remove(), otherwise components under debugfs root which has the same name as other components under pm_genpd may be accidentally removed, since NULL represents debugfs root. Fixes: 718072ceb211 ("PM: domains: create debugfs nodes when adding power domains") Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
0 files changed, 0 insertions, 0 deletions