drm/nouveau/i2c: fix debug message

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_i2c.c

@@ -375,9 +375,13 @@ nouveau_i2c_identify(struct drm_device *dev, const char *what,
 	struct nouveau_i2c_chan *i2c = nouveau_i2c_find(dev, index);
 	int i;
 
-	NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, index);
+	if (!i2c) {
+		NV_DEBUG(dev, "No bus when probing %s on %d\n", what, index);
+		return -ENODEV;
+	}
 
-	for (i = 0; i2c && info[i].addr; i++) {
+	NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, i2c->index);
+	for (i = 0; info[i].addr; i++) {
 		if (nouveau_probe_i2c_addr(i2c, info[i].addr) &&
 		    (!match || match(i2c, &info[i]))) {
 			NV_INFO(dev, "Detected %s: %s\n", what, info[i].type);
@@ -386,6 +390,5 @@ nouveau_i2c_identify(struct drm_device *dev, const char *what,
 	}
 
 	NV_DEBUG(dev, "No devices found.\n");
-
 	return -ENODEV;
 }