Merge remote-tracking branch 'ovl/for-viro' into for-linus

[sfrench/cifs-2.6.git] / drivers / block / loop.c

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index f347285c67ec1151d0d725842eed84ba2231f760..f52b88b8dfd021fd27676b9556e9b98d569bc000 100644 (file)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -501,9 +501,9 @@ static int lo_rw_aio(struct loop_device *lo, struct loop_cmd *cmd,
        cmd->iocb.ki_flags = IOCB_DIRECT;
 
        if (rw == WRITE)
-               ret = file->f_op->write_iter(&cmd->iocb, &iter);
+               ret = call_write_iter(file, &cmd->iocb, &iter);
        else
-               ret = file->f_op->read_iter(&cmd->iocb, &iter);
+               ret = call_read_iter(file, &cmd->iocb, &iter);
 
        if (ret != -EIOCBQUEUED)
                cmd->iocb.ki_complete(&cmd->iocb, ret, 0);
@@ -1097,9 +1097,12 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
        if ((unsigned int) info->lo_encrypt_key_size > LO_KEY_SIZE)
                return -EINVAL;
 
+       /* I/O need to be drained during transfer transition */
+       blk_mq_freeze_queue(lo->lo_queue);
+
        err = loop_release_xfer(lo);
        if (err)
-               return err;
+               goto exit;
 
        if (info->lo_encrypt_type) {
                unsigned int type = info->lo_encrypt_type;
@@ -1114,12 +1117,14 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
 
        err = loop_init_xfer(lo, xfer, info);
        if (err)
-               return err;
+               goto exit;
 
        if (lo->lo_offset != info->lo_offset ||
            lo->lo_sizelimit != info->lo_sizelimit)
-               if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit))
-                       return -EFBIG;
+               if (figure_loop_size(lo, info->lo_offset, info->lo_sizelimit)) {
+                       err = -EFBIG;
+                       goto exit;
+               }
 
        loop_config_discard(lo);
 
@@ -1156,7 +1161,9 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
        /* update dio if lo_offset or transfer is changed */
        __loop_update_dio(lo, lo->use_dio);
 
-       return 0;
+ exit:
+       blk_mq_unfreeze_queue(lo->lo_queue);
+       return err;
 }
 
 static int