From bb52d82f45df3a2661d88befba7c79a7db8be496 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 16:14:27 -0800 Subject: [SCSI] tgt: use scsi_init_io instead of scsi_alloc_sgtable If we export scsi_init_io()/scsi_release_buffers() instead of scsi_{alloc,free}_sgtable() from scsi_lib than tgt code is much more insulated from scsi_lib changes. As a bonus it will also gain bidi capability when it comes. [jejb: rebase on to sg_table and fix up rejections] Signed-off-by: Boaz Harrosh Acked-by: FUJITA Tomonori Signed-off-by: Andrew Morton Signed-off-by: James Bottomley --- drivers/scsi/scsi_lib.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) (limited to 'drivers/scsi/scsi_lib.c') diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 7c4c889c522..69fd62183ba 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -746,7 +746,7 @@ static struct scatterlist *scsi_sg_alloc(unsigned int nents, gfp_t gfp_mask) return mempool_alloc(sgp->pool, gfp_mask); } -int scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask) +static int scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask) { int ret; @@ -762,15 +762,11 @@ int scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask) return ret; } -EXPORT_SYMBOL(scsi_alloc_sgtable); - -void scsi_free_sgtable(struct scsi_cmnd *cmd) +static void scsi_free_sgtable(struct scsi_cmnd *cmd) { __sg_free_table(&cmd->sg_table, SCSI_MAX_SG_SEGMENTS, scsi_sg_free); } -EXPORT_SYMBOL(scsi_free_sgtable); - /* * Function: scsi_release_buffers() * @@ -788,7 +784,7 @@ EXPORT_SYMBOL(scsi_free_sgtable); * the scatter-gather table, and potentially any bounce * buffers. */ -static void scsi_release_buffers(struct scsi_cmnd *cmd) +void scsi_release_buffers(struct scsi_cmnd *cmd) { if (cmd->use_sg) scsi_free_sgtable(cmd); @@ -800,6 +796,7 @@ static void scsi_release_buffers(struct scsi_cmnd *cmd) cmd->request_buffer = NULL; cmd->request_bufflen = 0; } +EXPORT_SYMBOL(scsi_release_buffers); /* * Function: scsi_io_completion() @@ -1001,7 +998,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) * Returns: 0 on success * BLKPREP_DEFER if the failure is retryable */ -static int scsi_init_io(struct scsi_cmnd *cmd) +int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask) { struct request *req = cmd->request; int count; @@ -1016,7 +1013,7 @@ static int scsi_init_io(struct scsi_cmnd *cmd) /* * If sg table allocation fails, requeue request later. */ - if (unlikely(scsi_alloc_sgtable(cmd, GFP_ATOMIC))) { + if (unlikely(scsi_alloc_sgtable(cmd, gfp_mask))) { scsi_unprep_request(req); return BLKPREP_DEFER; } @@ -1036,6 +1033,7 @@ static int scsi_init_io(struct scsi_cmnd *cmd) cmd->use_sg = count; return BLKPREP_OK; } +EXPORT_SYMBOL(scsi_init_io); static struct scsi_cmnd *scsi_get_cmd_from_req(struct scsi_device *sdev, struct request *req) @@ -1081,7 +1079,7 @@ int scsi_setup_blk_pc_cmnd(struct scsi_device *sdev, struct request *req) BUG_ON(!req->nr_phys_segments); - ret = scsi_init_io(cmd); + ret = scsi_init_io(cmd, GFP_ATOMIC); if (unlikely(ret)) return ret; } else { @@ -1132,7 +1130,7 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) if (unlikely(!cmd)) return BLKPREP_DEFER; - return scsi_init_io(cmd); + return scsi_init_io(cmd, GFP_ATOMIC); } EXPORT_SYMBOL(scsi_setup_fs_cmnd); -- cgit v1.2.3