Felipe/Greg,

Any comments ?

On 10/17/18 11:40 AM, Kuppuswamy Sathyanarayanan wrote:

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: 5741022cbdf3 ("usb: dwc3: pci: Add GPIO lookup table on platforms without ACPI GPIO resources") Cc: stable@vger.kernel.org Signed-off-by: Kuppuswamy Sathyanarayanan sathyanarayanan.kuppuswamy@linux.intel.com Reviewed-by: Heikki Krogerus heikki.krogerus@linux.intel.com

---

drivers/usb/dwc3/dwc3-pci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index 1286076a8890..842795856bf4 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -283,8 +283,10 @@ static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) static void dwc3_pci_remove(struct pci_dev *pci) { struct dwc3_pci *dwc = pci_get_drvdata(pci);

• struct pci_dev *pdev = dwc->pci;

• gpiod_remove_lookup_table(&platform_bytcr_gpios);

• if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)

• gpiod_remove_lookup_table(&platform_bytcr_gpios);
  

  #ifdef CONFIG_PM cancel_work_sync(&dwc->wakeup_work); #endif