[PATCH 10/13] scsi: simplify scsi_free_sgtable()

Jens Axboe
2007-05-10T10:25:58Z

Just pass in the command, no point in passing in the scatterlist
and scatterlist pool index seperately.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
drivers/scsi/scsi_lib.c | 9 +++++----
drivers/scsi/scsi_tgt_lib.c | 4 ++--
include/scsi/scsi_cmnd.h | 2 +-
3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f944690..26236b1 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -745,13 +745,14 @@ struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask)

EXPORT_SYMBOL(scsi_alloc_sgtable);

-void scsi_free_sgtable(struct scatterlist *sgl, int index)
+void scsi_free_sgtable(struct scsi_cmnd *cmd)
{
+ struct scatterlist *sgl = cmd->request_buffer;
struct scsi_host_sg_pool *sgp;

- BUG_ON(index >= SG_MEMPOOL_NR);
+ BUG_ON(cmd->sglist_len >= SG_MEMPOOL_NR);

- sgp = scsi_sg_pools + index;
+ sgp = scsi_sg_pools + cmd->sglist_len;
mempool_free(sgl, sgp->pool);
}

@@ -777,7 +778,7 @@ EXPORT_SYMBOL(scsi_free_sgtable);
static void scsi_release_buffers(struct scsi_cmnd *cmd)
{
if (cmd->use_sg)
- scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len);
+ scsi_free_sgtable(cmd);

/*
* Zero these out. They now point to freed memory, and it is
diff --git a/drivers/scsi/scsi_tgt_lib.c b/drivers/scsi/scsi_tgt_lib.c
index 2570f48..d6e58e5 100644
--- a/drivers/scsi/scsi_tgt_lib.c
+++ b/drivers/scsi/scsi_tgt_lib.c
@@ -329,7 +329,7 @@ static void scsi_tgt_cmd_done(struct scsi_cmnd *cmd)
scsi_tgt_uspace_send_status(cmd, tcmd->tag);

if (cmd->request_buffer)
- scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len);
+ scsi_free_sgtable(cmd);

queue_work(scsi_tgtd, &tcmd->work);
}
@@ -370,7 +370,7 @@ static int scsi_tgt_init_cmd(struct scsi_cmnd *cmd, gfp_t gfp_mask)
}

eprintk("cmd %p cnt %d\n", cmd, cmd->use_sg);
- scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len);
+ scsi_free_sgtable(cmd);
return -EINVAL;
}

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index a2e0c10..d7db992 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -133,6 +133,6 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
extern void scsi_kunmap_atomic_sg(void *virt);

extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t);
-extern void scsi_free_sgtable(struct scatterlist *, int);
+extern void scsi_free_sgtable(struct scsi_cmnd *);

#endif /* _SCSI_SCSI_CMND_H */
--
1.5.2.rc1