usb: typec: ucsi: Fix NULL pointer dereference
Making sure the UCSI debugfs entry actually exists before attempting to remove it. Fixes: df0383ffad64 ("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>
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@ -84,6 +84,9 @@ void ucsi_debugfs_register(struct ucsi *ucsi)
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void ucsi_debugfs_unregister(struct ucsi *ucsi)
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{
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if (IS_ERR_OR_NULL(ucsi) || !ucsi->debugfs)
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return;
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debugfs_remove_recursive(ucsi->debugfs->dentry);
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kfree(ucsi->debugfs);
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}
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