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authorJens Axboe <jens.axboe@oracle.com>2007-10-24 11:20:47 +0200
committerJens Axboe <jens.axboe@oracle.com>2007-10-24 11:20:47 +0200
commit642f149031d70415d9318b919d50b71e4724adbd (patch)
treee792ad29dedffc6756d55e9d63e18ada35515b4b /drivers/scsi
parentbd6dee6f30a0f6943df190b387b5f8fe98a848f3 (diff)
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SG: Change sg_set_page() to take length and offset argument
Most drivers need to set length and offset as well, so may as well fold those three lines into one. Add sg_assign_page() for those two locations that only needed to set the page, where the offset/length is set outside of the function context. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ipr.c2
-rw-r--r--drivers/scsi/iscsi_tcp.c4
-rw-r--r--drivers/scsi/osst.c6
-rw-r--r--drivers/scsi/sg.c13
-rw-r--r--drivers/scsi/st.c14
5 files changed, 13 insertions, 26 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 439b97a..0841df0 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2890,7 +2890,7 @@ static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
return NULL;
}
- sg_set_page(&scatterlist[i], page);
+ sg_set_page(&scatterlist[i], page, 0, 0);
}
return sglist;
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 6ce4109..097a136 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -79,9 +79,7 @@ static inline void
iscsi_buf_init_sg(struct iscsi_buf *ibuf, struct scatterlist *sg)
{
sg_init_table(&ibuf->sg, 1);
- sg_set_page(&ibuf->sg, sg_page(sg));
- ibuf->sg.offset = sg->offset;
- ibuf->sg.length = sg->length;
+ sg_set_page(&ibuf->sg, sg_page(sg), sg->length, sg->offset);
/*
* Fastpath: sg element fits into single page
*/
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 1c5c4b6..4652ad2 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -5256,8 +5256,7 @@ static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma)
STbuffer->sg[0].offset = 0;
if (page != NULL) {
- sg_set_page(&STbuffer->sg[0], page);
- STbuffer->sg[0].length = b_size;
+ sg_set_page(&STbuffer->sg[0], page, b_size, 0);
STbuffer->b_data = page_address(page);
break;
}
@@ -5285,8 +5284,7 @@ static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma)
normalize_buffer(STbuffer);
return 0;
}
- sg_set_page(&STbuffer->sg[segs], page);
- STbuffer->sg[segs].length = (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - got) : b_size;
+ sg_set_page(&STbuffer->sg[segs], page, (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - got) : b_size, 0);
got += STbuffer->sg[segs].length;
STbuffer->buffer_size = got;
STbuffer->sg_segs = ++segs;
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index cc19710..b5fa4f0 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1717,16 +1717,12 @@ st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages,
goto out_unlock; */
}
- sg_set_page(sgl, pages[0]);
- sgl[0].offset = uaddr & ~PAGE_MASK;
+ sg_set_page(sgl, pages[0], 0, uaddr & ~PAGE_MASK);
if (nr_pages > 1) {
sgl[0].length = PAGE_SIZE - sgl[0].offset;
count -= sgl[0].length;
- for (i=1; i < nr_pages ; i++) {
- sg_set_page(&sgl[i], pages[i]);
- sgl[i].length = count < PAGE_SIZE ? count : PAGE_SIZE;
- count -= PAGE_SIZE;
- }
+ for (i=1; i < nr_pages ; i++)
+ sg_set_page(&sgl[i], pages[i], count < PAGE_SIZE ? count : PAGE_SIZE, 0);
}
else {
sgl[0].length = count;
@@ -1854,8 +1850,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
scatter_elem_sz_prev = ret_sz;
}
}
- sg_set_page(sg, p);
- sg->length = (ret_sz > num) ? num : ret_sz;
+ sg_set_page(sg, p, (ret_sz > num) ? num : ret_sz, 0);
SCSI_LOG_TIMEOUT(5, printk("sg_build_indirect: k=%d, num=%d, "
"ret_sz=%d\n", k, num, ret_sz));
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index ce69b9e..98dfd6e 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3797,13 +3797,11 @@ static void buf_to_sg(struct st_buffer *STbp, unsigned int length)
sg = &(STbp->sg[0]);
frp = STbp->frp;
for (i=count=0; count < length; i++) {
- sg_set_page(&sg[i], frp[i].page);
if (length - count > frp[i].length)
- sg[i].length = frp[i].length;
+ sg_set_page(&sg[i], frp[i].page, frp[i].length, 0);
else
- sg[i].length = length - count;
+ sg_set_page(&sg[i], frp[i].page, length - count, 0);
count += sg[i].length;
- sg[i].offset = 0;
}
STbp->sg_segs = i;
STbp->frp_sg_current = length;
@@ -4446,15 +4444,13 @@ static int sgl_map_user_pages(struct scatterlist *sgl, const unsigned int max_pa
}
/* Populate the scatter/gather list */
- sg_set_page(&sgl[0], pages[0]);
- sgl[0].offset = uaddr & ~PAGE_MASK;
+ sg_set_page(&sgl[0], pages[0], 0, uaddr & ~PAGE_MASK);
if (nr_pages > 1) {
sgl[0].length = PAGE_SIZE - sgl[0].offset;
count -= sgl[0].length;
for (i=1; i < nr_pages ; i++) {
- sg_set_page(&sgl[i], pages[i]);;
- sgl[i].offset = 0;
- sgl[i].length = count < PAGE_SIZE ? count : PAGE_SIZE;
+ sg_set_page(&sgl[i], pages[i],
+ count < PAGE_SIZE ? count : PAGE_SIZE, 0);;
count -= PAGE_SIZE;
}
}