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usb: typec: ucsi: Fix NULL pointer dereference

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Making sure the UCSI debugfs entry actually exists before
attempting to remove it.

Fixes: df0383ffad ("usb: typec: ucsi: Add debugfs for ucsi commands")
Reported-by: Dave Hansen <dave.hansen@intel.com>
Closes: https://lore.kernel.org/linux-usb/700df3c4-2f6c-85f9-6c61-065bc5b2db3a@intel.com/
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Cc: Saranya Gopal <saranya.gopal@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Link: https://lore.kernel.org/r/20230906084842.1922052-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2023-09-06 11:48:42 +03:00 committed by Greg Kroah-Hartman
parent 0bb80ecc33
commit f26a679ed7
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/typec/ucsi/debugfs.c
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@ -84,6 +84,9 @@ void ucsi_debugfs_register(struct ucsi *ucsi)
void ucsi_debugfs_unregister(struct ucsi *ucsi)
{
if (IS_ERR_OR_NULL(ucsi) || !ucsi->debugfs)
return;
debugfs_remove_recursive(ucsi->debugfs->dentry);
kfree(ucsi->debugfs);
}