usb: gadget: ci13xxx_pci: guard against devices without driver_data

Don't try to initialize devices that don't have driver_data assigned
to their pci ids.

Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/usb/gadget/ci13xxx_pci.c b/drivers/usb/gadget/ci13xxx_pci.c
index c76844110e36..f075ef33834f 100644
--- a/drivers/usb/gadget/ci13xxx_pci.c
+++ b/drivers/usb/gadget/ci13xxx_pci.c
@@ -51,6 +51,11 @@ static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
         struct resource res[3];
         int retval = 0, nres = 2;
 
+        if (!driver) {
+                dev_err(&pdev->dev, "device doesn't provide driver data\n");
+                return -ENODEV;
+        }
+
         retval = pci_enable_device(pdev);
         if (retval)
                 goto done;