drm/nv50: fix iommu errors caused by device reading from address 0

[safe/jmp/linux-2.6] / drivers / gpu / drm / drm_sysfs.c

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 1a1825b..101d381 100644 (file)
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -193,8 +193,9 @@ static ssize_t enabled_show(struct device *device,
                        "disabled");
 }
 
-static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr,
-                        char *buf, loff_t off, size_t count)
+static ssize_t edid_show(struct file *filp, struct kobject *kobj,
+                        struct bin_attribute *attr, char *buf, loff_t off,
+                        size_t count)
 {
        struct device *connector_dev = container_of(kobj, struct device, kobj);
        struct drm_connector *connector = to_drm_connector(connector_dev);
@@ -333,7 +334,7 @@ static struct device_attribute connector_attrs_opt1[] = {
 static struct bin_attribute edid_attr = {
        .attr.name = "edid",
        .attr.mode = 0444,
-       .size = 128,
+       .size = 0,
        .read = edid_show,
 };
 
@@ -354,7 +355,10 @@ static struct bin_attribute edid_attr = {
 int drm_sysfs_connector_add(struct drm_connector *connector)
 {
        struct drm_device *dev = connector->dev;
-       int ret = 0, i, j;
+       int attr_cnt = 0;
+       int opt_cnt = 0;
+       int i;
+       int ret = 0;
 
        /* We shouldn't get called more than once for the same connector */
        BUG_ON(device_is_registered(&connector->kdev));
@@ -377,8 +381,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
 
        /* Standard attributes */
 
-       for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) {
-               ret = device_create_file(&connector->kdev, &connector_attrs[i]);
+       for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) {
+               ret = device_create_file(&connector->kdev, &connector_attrs[attr_cnt]);
                if (ret)
                        goto err_out_files;
        }
@@ -394,8 +398,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
                case DRM_MODE_CONNECTOR_SVIDEO:
                case DRM_MODE_CONNECTOR_Component:
                case DRM_MODE_CONNECTOR_TV:
-                       for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) {
-                               ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]);
+                       for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) {
+                               ret = device_create_file(&connector->kdev, &connector_attrs_opt1[opt_cnt]);
                                if (ret)
                                        goto err_out_files;
                        }
@@ -414,10 +418,10 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
        return 0;
 
 err_out_files:
-       if (i > 0)
-               for (j = 0; j < i; j++)
-                       device_remove_file(&connector->kdev,
-                                          &connector_attrs[i]);
+       for (i = 0; i < opt_cnt; i++)
+               device_remove_file(&connector->kdev, &connector_attrs_opt1[i]);
+       for (i = 0; i < attr_cnt; i++)
+               device_remove_file(&connector->kdev, &connector_attrs[i]);
        device_unregister(&connector->kdev);
 
 out: