diff options
author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-02-12 17:58:19 +0100 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-14 03:49:15 +0100 |
commit | ed4414cef2ad0ad0afb3d77a6fdde425d7f7ec4d (patch) | |
tree | d76cd830f86a373d7f3c23391d04af20725accfd /drivers/scsi/pmcraid.c | |
parent | scsi: pmcraid: Remove an unused structure member (diff) | |
download | linux-ed4414cef2ad0ad0afb3d77a6fdde425d7f7ec4d.tar.xz linux-ed4414cef2ad0ad0afb3d77a6fdde425d7f7ec4d.zip |
scsi: pmcraid: Use sgl_alloc_order() and sgl_free_order()
Use the sgl_alloc_order() and sgl_free_order() functions instead of open
coding these functions.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/pmcraid.c')
-rw-r--r-- | drivers/scsi/pmcraid.c | 43 |
1 files changed, 4 insertions, 39 deletions
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c index 9330cc5ba34d..95530393872d 100644 --- a/drivers/scsi/pmcraid.c +++ b/drivers/scsi/pmcraid.c @@ -3225,12 +3225,7 @@ static int pmcraid_build_ioadl( */ static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) { - int i; - - for (i = 0; i < sglist->num_sg; i++) - __free_pages(sg_page(&(sglist->scatterlist[i])), - sglist->order); - + sgl_free_order(sglist->scatterlist, sglist->order); kfree(sglist); } @@ -3247,50 +3242,20 @@ static void pmcraid_free_sglist(struct pmcraid_sglist *sglist) static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen) { struct pmcraid_sglist *sglist; - struct scatterlist *scatterlist; - struct page *page; - int num_elem, i, j; int sg_size; int order; - int bsize_elem; sg_size = buflen / (PMCRAID_MAX_IOADLS - 1); order = (sg_size > 0) ? get_order(sg_size) : 0; - bsize_elem = PAGE_SIZE * (1 << order); - - /* Determine the actual number of sg entries needed */ - if (buflen % bsize_elem) - num_elem = (buflen / bsize_elem) + 1; - else - num_elem = buflen / bsize_elem; /* Allocate a scatter/gather list for the DMA */ - sglist = kzalloc(sizeof(struct pmcraid_sglist) + - (sizeof(struct scatterlist) * (num_elem - 1)), - GFP_KERNEL); - + sglist = kzalloc(sizeof(struct pmcraid_sglist), GFP_KERNEL); if (sglist == NULL) return NULL; - scatterlist = sglist->scatterlist; - sg_init_table(scatterlist, num_elem); sglist->order = order; - sglist->num_sg = num_elem; - sg_size = buflen; - - for (i = 0; i < num_elem; i++) { - page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order); - if (!page) { - for (j = i - 1; j >= 0; j--) - __free_pages(sg_page(&scatterlist[j]), order); - kfree(sglist); - return NULL; - } - - sg_set_page(&scatterlist[i], page, - sg_size < bsize_elem ? sg_size : bsize_elem, 0); - sg_size -= bsize_elem; - } + sgl_alloc_order(buflen, order, false, + GFP_KERNEL | GFP_DMA | __GFP_ZERO, &sglist->num_sg); return sglist; } |