- patches.suse/slab-handle-memoryless-nodes-v2a.patch: Refresh.

[linux-flexiantxendom0-3.2.10.git] / drivers / gpu / drm / drm_drv.c

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index a75ca63..766c468 100644 (file)
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -145,6 +145,8 @@ static struct drm_ioctl_desc drm_ioctls[] = {
        DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW),
        DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW),
        DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW),
+       DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
+       DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW)
 };
 
 #define DRM_CORE_IOCTL_COUNT   ARRAY_SIZE( drm_ioctls )
@@ -366,6 +368,29 @@ module_init(drm_core_init);
 module_exit(drm_core_exit);
 
 /**
+ * Copy and IOCTL return string to user space
+ */
+static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
+{
+       int len;
+
+       /* don't overflow userbuf */
+       len = strlen(value);
+       if (len > *buf_len)
+               len = *buf_len;
+
+       /* let userspace know exact length of driver value (which could be
+        * larger than the userspace-supplied buffer) */
+       *buf_len = strlen(value);
+
+       /* finally, try filling in the userbuf */
+       if (len && buf)
+               if (copy_to_user(buf, value, len))
+                       return -EFAULT;
+       return 0;
+}
+
+/**
  * Get version information
  *
  * \param inode device inode.
@@ -380,16 +405,21 @@ static int drm_version(struct drm_device *dev, void *data,
                       struct drm_file *file_priv)
 {
        struct drm_version *version = data;
-       int len;
+       int err;
 
        version->version_major = dev->driver->major;
        version->version_minor = dev->driver->minor;
        version->version_patchlevel = dev->driver->patchlevel;
-       DRM_COPY(version->name, dev->driver->name);
-       DRM_COPY(version->date, dev->driver->date);
-       DRM_COPY(version->desc, dev->driver->desc);
-
-       return 0;
+       err = drm_copy_field(version->name, &version->name_len,
+                       dev->driver->name);
+       if (!err)
+               err = drm_copy_field(version->date, &version->date_len,
+                               dev->driver->date);
+       if (!err)
+               err = drm_copy_field(version->desc, &version->desc_len,
+                               dev->driver->desc);
+
+       return err;
 }
 
 /**
@@ -404,11 +434,11 @@ static int drm_version(struct drm_device *dev, void *data,
  * Looks up the ioctl function in the ::ioctls table, checking for root
  * previleges if so required, and dispatches to the respective function.
  */
-int drm_ioctl(struct inode *inode, struct file *filp,
+long drm_ioctl(struct file *filp,
              unsigned int cmd, unsigned long arg)
 {
        struct drm_file *file_priv = filp->private_data;
-       struct drm_device *dev = file_priv->minor->dev;
+       struct drm_device *dev;
        struct drm_ioctl_desc *ioctl;
        drm_ioctl_t *func;
        unsigned int nr = DRM_IOCTL_NR(cmd);
@@ -416,6 +446,7 @@ int drm_ioctl(struct inode *inode, struct file *filp,
        char stack_kdata[128];
        char *kdata = NULL;
 
+       dev = file_priv->minor->dev;
        atomic_inc(&dev->ioctl_count);
        atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
        ++file_priv->ioctl_count;
@@ -471,7 +502,13 @@ int drm_ioctl(struct inode *inode, struct file *filp,
                                goto err_i1;
                        }
                }
-               retcode = func(dev, kdata, file_priv);
+               if (ioctl->flags & DRM_UNLOCKED)
+                       retcode = func(dev, kdata, file_priv);
+               else {
+                       lock_kernel();
+                       retcode = func(dev, kdata, file_priv);
+                       unlock_kernel();
+               }
 
                if (cmd & IOC_OUT) {
                        if (copy_to_user((void __user *)arg, kdata,