drm: drm_ioctl.c sync with fixes from CVS

Apply the fixes from CVS that were outstanding for this file

Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/char/drm/drm_ioctl.c b/drivers/char/drm/drm_ioctl.c
index a654ac1..bcd4e60 100644 (file)
--- a/drivers/char/drm/drm_ioctl.c
+++ b/drivers/char/drm/drm_ioctl.c
@@ -137,17 +137,22 @@ int drm_setunique(struct inode *inode, struct file *filp,
 
 static int drm_set_busid(drm_device_t * dev)
 {
+       int len;
+
        if (dev->unique != NULL)
                return EBUSY;
 
-       dev->unique_len = 20;
+       dev->unique_len = 40;
        dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
        if (dev->unique == NULL)
                return ENOMEM;
 
-       snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
+       len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
                 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
 
+       if (len > dev->unique_len)
+               DRM_ERROR("Unique buffer overflowed\n");
+
        dev->devname =
            drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
                      2, DRM_MEM_DRIVER);
@@ -239,7 +244,7 @@ int drm_getclient(struct inode *inode, struct file *filp,
 {
        drm_file_t *priv = filp->private_data;
        drm_device_t *dev = priv->head->dev;
-       drm_client_t __user *argp = (void __user *)arg;
+       drm_client_t __user *argp = (drm_client_t __user *)arg;
        drm_client_t client;
        drm_file_t *pt;
        int idx;
@@ -262,7 +267,7 @@ int drm_getclient(struct inode *inode, struct file *filp,
        client.iocs = pt->ioctl_count;
        up(&dev->struct_sem);
 
-       if (copy_to_user((drm_client_t __user *) arg, &client, sizeof(client)))
+       if (copy_to_user(argp, &client, sizeof(client)))
                return -EFAULT;
        return 0;
 }
@@ -339,7 +344,7 @@ int drm_setversion(DRM_IOCTL_ARGS)
                if (sv.drm_di_major != DRM_IF_MAJOR ||
                    sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR)
                        return EINVAL;
-               if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_dd_minor);
+               if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
                dev->if_version = DRM_MAX(if_version, dev->if_version);
                if (sv.drm_di_minor >= 1) {
                        /*