comedi_open: Fix null pointer dereference.

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 7fc40ca1a1defd91bd324305156b4caff86ad578..198f4d992df645a45556847ab95165a6a96443da 100644 (file)
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1756,7 +1756,7 @@ static int comedi_open(struct inode *inode, struct file *file)
 {
        const unsigned minor = iminor(inode);
        struct comedi_device_file_info *dev_file_info = comedi_get_device_file_info(minor);
-       comedi_device *dev = dev_file_info->device;
+       comedi_device *dev = dev_file_info ? dev_file_info->device : NULL;
        if (dev == NULL) {
                DPRINTK("invalid minor number\n");
                return -ENODEV;