diff options
| author |   Christoph Hellwig <hch@lst.de> | 2014-06-28 11:51:01 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-07-17 22:10:53 +0200 |
| commit | 635d98b1d0cfc2ba3426a701725d31a6102c059a (patch) | |
| tree | 2a553dbd044567d3c76a3864dacf1bea62159358 | |
| parent | scsi_lib: remove the description string in scsi_io_completion() (diff) | |
| download | linux-dev-635d98b1d0cfc2ba3426a701725d31a6102c059a.tar.xz linux-dev-635d98b1d0cfc2ba3426a701725d31a6102c059a.zip | |
scsi: move the nr_phys_segments assert into scsi_init_io
scsi_init_io should only be called for requests that transfer data,
so move the assert that a request has segments from the callers into
scsi_init_io.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 03076b2b5deb..150d7bb675a1 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -963,8 +963,11 @@ int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask) { struct scsi_device *sdev = cmd->device; struct request *rq = cmd->request; + int error; - int error = scsi_init_sgtable(rq, &cmd->sdb, gfp_mask); + BUG_ON(!rq->nr_phys_segments); + + error = scsi_init_sgtable(rq, &cmd->sdb, gfp_mask); if (error) goto err_exit; @@ -1055,11 +1058,7 @@ int scsi_setup_blk_pc_cmnd(struct scsi_device *sdev, struct request *req) * submit a request without an attached bio. */ if (req->bio) { - int ret; - - BUG_ON(!req->nr_phys_segments); - - ret = scsi_init_io(cmd, GFP_ATOMIC); + int ret = scsi_init_io(cmd, GFP_ATOMIC); if (unlikely(ret)) return ret; } else { @@ -1098,11 +1097,6 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) return ret; } - /* - * Filesystem requests must transfer data. - */ - BUG_ON(!req->nr_phys_segments); - memset(cmd->cmnd, 0, BLK_MAX_CDB); return scsi_init_io(cmd, GFP_ATOMIC); } |