usb: dwc3: Fix NULL pointer exception in dwc3_pci_remove()
commit 7b412b04a0c7000293008231ce8413056abb1982 upstream. In dwc3_pci_quirks() function, gpiod lookup table is only registered for baytrail SOC. But in dwc3_pci_remove(), we try to unregistered it without any checks. This leads to NULL pointer de-reference exception in gpiod_remove_lookup_table() when unloading the module for non baytrail SOCs. This patch fixes this issue. Fixes: 5741022c ("usb: dwc3: pci: Add GPIO lookup table on platforms without ACPI GPIO resources") Cc: <stable@vger.kernel.org> Signed-off-by: NKuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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