Merge branch 'linus' into x86/urgent

[pandora-kernel.git] / drivers / infiniband / core / uverbs_main.c

diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index cc1afa2..0f34858 100644 (file)
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -423,7 +423,7 @@ static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
        unsigned long flags;
 
        spin_lock_irqsave(&file->async_file->lock, flags);
-       if (!file->async_file->is_closed) {
+       if (file->async_file->is_closed) {
                spin_unlock_irqrestore(&file->async_file->lock, flags);
                return;
        }
@@ -610,6 +610,18 @@ 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 +663,6 @@ err_module:
 
 err:
        kref_put(&dev->ref, ib_uverbs_release_dev);
-
        return ret;
 }
 
@@ -755,14 +766,15 @@ static void ib_uverbs_add_one(struct ib_device *device)
        if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
                goto err_cdev;
 
-       uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
-                                       uverbs_dev->cdev->dev,
-                                       "uverbs%d", uverbs_dev->devnum);
+       uverbs_dev->dev = device_create_drvdata(uverbs_class,
+                                               device->dma_device,
+                                               uverbs_dev->cdev->dev,
+                                               uverbs_dev,
+                                               "uverbs%d",
+                                               uverbs_dev->devnum);
        if (IS_ERR(uverbs_dev->dev))
                goto err_cdev;
 
-       dev_set_drvdata(uverbs_dev->dev, uverbs_dev);
-
        if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
                goto err_class;
        if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))