aboutsummaryrefslogtreecommitdiff
path: root/drivers/infiniband/core/uverbs_main.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/infiniband/core/uverbs_main.c')
-rw-r--r--drivers/infiniband/core/uverbs_main.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index caed42bf7ef..aeee856c406 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -32,8 +32,6 @@
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
- *
- * $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
*/
#include <linux/module.h>
@@ -610,6 +608,18 @@ static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
return file->device->ib_dev->mmap(file->ucontext, vma);
}
+/*
+ * ib_uverbs_open() does not need the BKL:
+ *
+ * - dev_table[] accesses are protected by map_lock, the
+ * ib_uverbs_device structures are properly reference counted, and
+ * everything else is purely local to the file being created, so
+ * races against other open calls are not a problem;
+ * - there is no ioctl method to race against;
+ * - the device is added to dev_table[] as the last part of module
+ * initialization, the open method will either immediately run
+ * -ENXIO, or all required initialization will be done.
+ */
static int ib_uverbs_open(struct inode *inode, struct file *filp)
{
struct ib_uverbs_device *dev;
@@ -651,7 +661,6 @@ err_module:
err:
kref_put(&dev->ref, ib_uverbs_release_dev);
-
return ret;
}