ARC: intc: Document arc_request_percpu_irq() better

[cascardo/linux.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 0a793c7..c25639e 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -50,12 +50,21 @@ struct block_device *I_BDEV(struct inode *inode)
 }
 EXPORT_SYMBOL(I_BDEV);
 
-static void bdev_write_inode(struct inode *inode)
+static void bdev_write_inode(struct block_device *bdev)
 {
+       struct inode *inode = bdev->bd_inode;
+       int ret;
+
        spin_lock(&inode->i_lock);
        while (inode->i_state & I_DIRTY) {
                spin_unlock(&inode->i_lock);
-               WARN_ON_ONCE(write_inode_now(inode, true));
+               ret = write_inode_now(inode, true);
+               if (ret) {
+                       char name[BDEVNAME_SIZE];
+                       pr_warn_ratelimited("VFS: Dirty inode writeback failed "
+                                           "for block device %s (err=%d).\n",
+                                           bdevname(bdev, name), ret);
+               }
                spin_lock(&inode->i_lock);
        }
        spin_unlock(&inode->i_lock);
@@ -381,9 +390,17 @@ int bdev_read_page(struct block_device *bdev, sector_t sector,
                        struct page *page)
 {
        const struct block_device_operations *ops = bdev->bd_disk->fops;
+       int result = -EOPNOTSUPP;
+
        if (!ops->rw_page || bdev_get_integrity(bdev))
-               return -EOPNOTSUPP;
-       return ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ);
+               return result;
+
+       result = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
+       if (result)
+               return result;
+       result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ);
+       blk_queue_exit(bdev->bd_queue);
+       return result;
 }
 EXPORT_SYMBOL_GPL(bdev_read_page);
 
@@ -412,14 +429,20 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
        int result;
        int rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE;
        const struct block_device_operations *ops = bdev->bd_disk->fops;
+
        if (!ops->rw_page || bdev_get_integrity(bdev))
                return -EOPNOTSUPP;
+       result = blk_queue_enter(bdev->bd_queue, GFP_KERNEL);
+       if (result)
+               return result;
+
        set_page_writeback(page);
        result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, rw);
        if (result)
                end_page_writeback(page);
        else
                unlock_page(page);
+       blk_queue_exit(bdev->bd_queue);
        return result;
 }
 EXPORT_SYMBOL_GPL(bdev_write_page);
@@ -1504,7 +1527,7 @@ static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
                 * ->release can cause the queue to disappear, so flush all
                 * dirty data before.
                 */
-               bdev_write_inode(bdev->bd_inode);
+               bdev_write_inode(bdev);
        }
        if (bdev->bd_contains == bdev) {
                if (disk->fops->release)