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authorLi Jun <jun.li@nxp.com>2019-07-17 16:06:46 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-07-30 11:04:09 +0200
commit12ca7297b8855c0af1848503d37196159b24e6b9 (patch)
tree1739531a98a55c571746cef46560321892b97718 /drivers/usb/typec
parentfd5da3e2cc61b4a7c877172fdc9348c82cf6ccfc (diff)
usb: typec: tcpm: remove tcpm dir if no children
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: 4b4e02c83167 ("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>
Diffstat (limited to 'drivers/usb/typec')
-rw-r--r--drivers/usb/typec/tcpm/tcpm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 7b6497c1031e..ab6456622120 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -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