block, scsi: Make SCSI quiesce and resume work reliably

[mirror_ubuntu-bionic-kernel.git] / fs / block_dev.c

diff --git a/fs/block_dev.c b/fs/block_dev.c
index bb715b2fcfb80f7fb50903a61d1b22d405af7ddf..04973f48442243a441364b2f4cf75b1c8d50257c 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -54,18 +54,6 @@ struct block_device *I_BDEV(struct inode *inode)
 }
 EXPORT_SYMBOL(I_BDEV);
 
-void __vfs_msg(struct super_block *sb, const char *prefix, const char *fmt, ...)
-{
-       struct va_format vaf;
-       va_list args;
-
-       va_start(args, fmt);
-       vaf.fmt = fmt;
-       vaf.va = &args;
-       printk_ratelimited("%sVFS (%s): %pV\n", prefix, sb->s_id, &vaf);
-       va_end(args);
-}
-
 static void bdev_write_inode(struct block_device *bdev)
 {
        struct inode *inode = bdev->bd_inode;
@@ -249,7 +237,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
                if (!READ_ONCE(bio.bi_private))
                        break;
                if (!(iocb->ki_flags & IOCB_HIPRI) ||
-                   !blk_mq_poll(bdev_get_queue(bdev), qc))
+                   !blk_poll(bdev_get_queue(bdev), qc))
                        io_schedule();
        }
        __set_current_state(TASK_RUNNING);
@@ -414,7 +402,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
                        break;
 
                if (!(iocb->ki_flags & IOCB_HIPRI) ||
-                   !blk_mq_poll(bdev_get_queue(bdev), qc))
+                   !blk_poll(bdev_get_queue(bdev), qc))
                        io_schedule();
        }
        __set_current_state(TASK_RUNNING);
@@ -674,7 +662,7 @@ int bdev_read_page(struct block_device *bdev, sector_t sector,
        if (!ops->rw_page || bdev_get_integrity(bdev))
                return result;
 
-       result = blk_queue_enter(bdev->bd_queue, false);
+       result = blk_queue_enter(bdev->bd_queue, 0);
        if (result)
                return result;
        result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, false);
@@ -710,7 +698,7 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
 
        if (!ops->rw_page || bdev_get_integrity(bdev))
                return -EOPNOTSUPP;
-       result = blk_queue_enter(bdev->bd_queue, false);
+       result = blk_queue_enter(bdev->bd_queue, 0);
        if (result)
                return result;
 
@@ -1740,6 +1728,8 @@ static int blkdev_open(struct inode * inode, struct file * filp)
         */
        filp->f_flags |= O_LARGEFILE;
 
+       filp->f_mode |= FMODE_NOWAIT;
+
        if (filp->f_flags & O_NDELAY)
                filp->f_mode |= FMODE_NDELAY;
        if (filp->f_flags & O_EXCL)
@@ -1892,6 +1882,9 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
        if (iocb->ki_pos >= size)
                return -ENOSPC;
 
+       if ((iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT)) == IOCB_NOWAIT)
+               return -EOPNOTSUPP;
+
        iov_iter_truncate(from, size - iocb->ki_pos);
 
        blk_start_plug(&plug);