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path: root/drivers/char/drm/drm_ioctl.c
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Diffstat (limited to 'drivers/char/drm/drm_ioctl.c')
-rw-r--r--drivers/char/drm/drm_ioctl.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/char/drm/drm_ioctl.c b/drivers/char/drm/drm_ioctl.c
index 9b0feba6b06..bcd4e604d3e 100644
--- 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;
}
@@ -325,17 +330,13 @@ int drm_setversion(DRM_IOCTL_ARGS)
drm_set_version_t retv;
int if_version;
drm_set_version_t __user *argp = (void __user *)data;
- drm_version_t version;
DRM_COPY_FROM_USER_IOCTL(sv, argp, sizeof(sv));
- memset(&version, 0, sizeof(version));
-
- dev->driver->version(&version);
retv.drm_di_major = DRM_IF_MAJOR;
retv.drm_di_minor = DRM_IF_MINOR;
- retv.drm_dd_major = version.version_major;
- retv.drm_dd_minor = version.version_minor;
+ retv.drm_dd_major = dev->driver->major;
+ retv.drm_dd_minor = dev->driver->minor;
DRM_COPY_TO_USER_IOCTL(argp, retv, sizeof(sv));
@@ -343,7 +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) {
/*
@@ -354,9 +355,9 @@ int drm_setversion(DRM_IOCTL_ARGS)
}
if (sv.drm_dd_major != -1) {
- if (sv.drm_dd_major != version.version_major ||
+ if (sv.drm_dd_major != dev->driver->major ||
sv.drm_dd_minor < 0
- || sv.drm_dd_minor > version.version_minor)
+ || sv.drm_dd_minor > dev->driver->minor)
return EINVAL;
if (dev->driver->set_version)