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usb: typec: tcpm: remove tcpm dir if no children

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If config tcpm as module, module unload will not remove tcpm dir,
then the next module load will have problem: the rootdir is NULL
but tcpm dir is still there, so tcpm_debugfs_init() will create
tcpm dir again with failure, fix it by remove the tcpm dir if no
children.

Cc: stable@vger.kernel.org # v4.15+
Fixes: 4b4e02c831 ("typec: tcpm: Move out of staging")
Signed-off-by: Li Jun <jun.li@nxp.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190717080646.30421-2-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Jun 2019-07-17 16:06:46 +08:00 committed by Greg Kroah-Hartman
parent fd5da3e2cc
commit 12ca7297b8
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/typec/tcpm/tcpm.c
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@ -597,6 +597,10 @@ static void tcpm_debugfs_exit(struct tcpm_port *port)
mutex_unlock(&port->logbuffer_lock);
debugfs_remove(port->dentry);
if (list_empty(&rootdir->d_subdirs)) {
debugfs_remove(rootdir);
rootdir = NULL;
}
}
#else