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author | Ming Lin <ming.l@ssi.samsung.com> | 2016-04-04 14:48:10 -0700 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-04-15 16:53:14 -0400 |
commit | 65e8617fba17732b4c68d3369a621725838b6f28 (patch) | |
tree | e9adae8498a721ad58c7917283076e3bdbd73a2b /drivers/scsi/scsi_lib.c | |
parent | 001d63be61c3b5a0413a46bacafbfc60c353951a (diff) | |
download | linux-65e8617fba17732b4c68d3369a621725838b6f28.tar.gz linux-65e8617fba17732b4c68d3369a621725838b6f28.tar.bz2 linux-65e8617fba17732b4c68d3369a621725838b6f28.zip |
scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTS
Rename SCSI_MAX_SG_SEGMENTS to SG_CHUNK_SIZE, which means the amount
we fit into a single scatterlist chunk.
Rename SCSI_MAX_SG_CHAIN_SEGMENTS to SG_MAX_SEGMENTS.
Will move these 2 generic definitions to scatterlist.h later.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bart Van Assche <bart.vanassche@sandisk.com> (for ib_srp changes)
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r-- | drivers/scsi/scsi_lib.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 08134f621450..8f776f1e95ce 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -51,25 +51,25 @@ struct sg_pool { }; #define SP(x) { .size = x, "sgpool-" __stringify(x) } -#if (SCSI_MAX_SG_SEGMENTS < 32) -#error SCSI_MAX_SG_SEGMENTS is too small (must be 32 or greater) +#if (SG_CHUNK_SIZE < 32) +#error SG_CHUNK_SIZE is too small (must be 32 or greater) #endif static struct sg_pool sg_pools[] = { SP(8), SP(16), -#if (SCSI_MAX_SG_SEGMENTS > 32) +#if (SG_CHUNK_SIZE > 32) SP(32), -#if (SCSI_MAX_SG_SEGMENTS > 64) +#if (SG_CHUNK_SIZE > 64) SP(64), -#if (SCSI_MAX_SG_SEGMENTS > 128) +#if (SG_CHUNK_SIZE > 128) SP(128), -#if (SCSI_MAX_SG_SEGMENTS > 256) -#error SCSI_MAX_SG_SEGMENTS is too large (256 MAX) +#if (SG_CHUNK_SIZE > 256) +#error SG_CHUNK_SIZE is too large (256 MAX) #endif #endif #endif #endif - SP(SCSI_MAX_SG_SEGMENTS) + SP(SG_CHUNK_SIZE) }; #undef SP @@ -557,7 +557,7 @@ static inline unsigned int sg_pool_index(unsigned short nents) { unsigned int index; - BUG_ON(nents > SCSI_MAX_SG_SEGMENTS); + BUG_ON(nents > SG_CHUNK_SIZE); if (nents <= 8) index = 0; @@ -585,9 +585,9 @@ static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask) static void sg_free_table_chained(struct sg_table *table, bool first_chunk) { - if (first_chunk && table->orig_nents <= SCSI_MAX_SG_SEGMENTS) + if (first_chunk && table->orig_nents <= SG_CHUNK_SIZE) return; - __sg_free_table(table, SCSI_MAX_SG_SEGMENTS, first_chunk, sg_pool_free); + __sg_free_table(table, SG_CHUNK_SIZE, first_chunk, sg_pool_free); } static int sg_alloc_table_chained(struct sg_table *table, int nents, @@ -598,14 +598,14 @@ static int sg_alloc_table_chained(struct sg_table *table, int nents, BUG_ON(!nents); if (first_chunk) { - if (nents <= SCSI_MAX_SG_SEGMENTS) { + if (nents <= SG_CHUNK_SIZE) { table->nents = table->orig_nents = nents; sg_init_table(table->sgl, nents); return 0; } } - ret = __sg_alloc_table(table, nents, SCSI_MAX_SG_SEGMENTS, + ret = __sg_alloc_table(table, nents, SG_CHUNK_SIZE, first_chunk, GFP_ATOMIC, sg_pool_alloc); if (unlikely(ret)) sg_free_table_chained(table, (bool)first_chunk); @@ -1937,7 +1937,7 @@ static int scsi_mq_prep_fn(struct request *req) if (scsi_host_get_prot(shost)) { cmd->prot_sdb = (void *)sg + min_t(unsigned int, - shost->sg_tablesize, SCSI_MAX_SG_SEGMENTS) * + shost->sg_tablesize, SG_CHUNK_SIZE) * sizeof(struct scatterlist); memset(cmd->prot_sdb, 0, sizeof(struct scsi_data_buffer)); @@ -2110,7 +2110,7 @@ static void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q) * this limit is imposed by hardware restrictions */ blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize, - SCSI_MAX_SG_CHAIN_SEGMENTS)); + SG_MAX_SEGMENTS)); if (scsi_host_prot_dma(shost)) { shost->sg_prot_tablesize = @@ -2192,8 +2192,8 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost) unsigned int cmd_size, sgl_size, tbl_size; tbl_size = shost->sg_tablesize; - if (tbl_size > SCSI_MAX_SG_SEGMENTS) - tbl_size = SCSI_MAX_SG_SEGMENTS; + if (tbl_size > SG_CHUNK_SIZE) + tbl_size = SG_CHUNK_SIZE; sgl_size = tbl_size * sizeof(struct scatterlist); cmd_size = sizeof(struct scsi_cmnd) + shost->hostt->cmd_size + sgl_size; if (scsi_host_get_prot(shost)) |