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authorKuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>2018-10-17 21:40:26 +0300
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-11-14 11:37:19 +0300
commit7b412b04a0c7000293008231ce8413056abb1982 (patch)
treee6879ed9eee28b120b222fe237d0a398a3ed1e54
parentba3a51ac32ebcf8d0a54b37f1af268ad8a31c52f (diff)
downloadlinux-7b412b04a0c7000293008231ce8413056abb1982.tar.xz
usb: dwc3: Fix NULL pointer exception in dwc3_pci_remove()
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> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
-rw-r--r--drivers/usb/dwc3/dwc3-pci.c4
1 files changed, 3 insertions, 1 deletions
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 @@ err:
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