summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/sg.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/sg.c')
-rw-r--r--drivers/scsi/sg.c52
1 files changed, 24 insertions, 28 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index f6f5fc7d0ce..f1871ea0404 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1165,11 +1165,11 @@ sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type)
sg = rsv_schp->buffer;
sa = vma->vm_start;
for (k = 0; (k < rsv_schp->k_use_sg) && (sa < vma->vm_end);
- ++k, ++sg) {
+ ++k, sg = sg_next(sg)) {
len = vma->vm_end - sa;
len = (len < sg->length) ? len : sg->length;
if (offset < len) {
- page = virt_to_page(page_address(sg->page) + offset);
+ page = virt_to_page(page_address(sg_page(sg)) + offset);
get_page(page); /* increment page count */
break;
}
@@ -1209,7 +1209,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
sa = vma->vm_start;
sg = rsv_schp->buffer;
for (k = 0; (k < rsv_schp->k_use_sg) && (sa < vma->vm_end);
- ++k, ++sg) {
+ ++k, sg = sg_next(sg)) {
len = vma->vm_end - sa;
len = (len < sg->length) ? len : sg->length;
sa += len;
@@ -1652,6 +1652,7 @@ sg_build_sgat(Sg_scatter_hold * schp, const Sg_fd * sfp, int tablesize)
schp->buffer = kzalloc(sg_bufflen, gfp_flags);
if (!schp->buffer)
return -ENOMEM;
+ sg_init_table(schp->buffer, tablesize);
schp->sglist_len = sg_bufflen;
return tablesize; /* number of scat_gath elements allocated */
}
@@ -1717,16 +1718,12 @@ st_map_user_pages(struct scatterlist *sgl, const unsigned int max_pages,
goto out_unlock; */
}
- sgl[0].page = 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++) {
- sgl[i].page = 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;
@@ -1754,7 +1751,7 @@ st_unmap_user_pages(struct scatterlist *sgl, const unsigned int nr_pages,
int i;
for (i=0; i < nr_pages; i++) {
- struct page *page = sgl[i].page;
+ struct page *page = sg_page(&sgl[i]);
if (dirtied)
SetPageDirty(page);
@@ -1840,7 +1837,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
}
for (k = 0, sg = schp->buffer, rem_sz = blk_size;
(rem_sz > 0) && (k < mx_sc_elems);
- ++k, rem_sz -= ret_sz, ++sg) {
+ ++k, rem_sz -= ret_sz, sg = sg_next(sg)) {
num = (rem_sz > scatter_elem_sz_prev) ?
scatter_elem_sz_prev : rem_sz;
@@ -1854,8 +1851,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
scatter_elem_sz_prev = ret_sz;
}
}
- sg->page = 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));
@@ -1907,14 +1903,14 @@ sg_write_xfer(Sg_request * srp)
onum = 1;
ksglen = sg->length;
- p = page_address(sg->page);
+ p = page_address(sg_page(sg));
for (j = 0, k = 0; j < onum; ++j) {
res = sg_u_iovec(hp, iovec_count, j, 1, &usglen, &up);
if (res)
return res;
- for (; p; ++sg, ksglen = sg->length,
- p = page_address(sg->page)) {
+ for (; p; sg = sg_next(sg), ksglen = sg->length,
+ p = page_address(sg_page(sg))) {
if (usglen <= 0)
break;
if (ksglen > usglen) {
@@ -1991,12 +1987,12 @@ sg_remove_scat(Sg_scatter_hold * schp)
} else {
int k;
- for (k = 0; (k < schp->k_use_sg) && sg->page;
- ++k, ++sg) {
+ for (k = 0; (k < schp->k_use_sg) && sg_page(sg);
+ ++k, sg = sg_next(sg)) {
SCSI_LOG_TIMEOUT(5, printk(
"sg_remove_scat: k=%d, pg=0x%p, len=%d\n",
- k, sg->page, sg->length));
- sg_page_free(sg->page, sg->length);
+ k, sg_page(sg), sg->length));
+ sg_page_free(sg_page(sg), sg->length);
}
}
kfree(schp->buffer);
@@ -2038,15 +2034,15 @@ sg_read_xfer(Sg_request * srp)
} else
onum = 1;
- p = page_address(sg->page);
+ p = page_address(sg_page(sg));
ksglen = sg->length;
for (j = 0, k = 0; j < onum; ++j) {
res = sg_u_iovec(hp, iovec_count, j, 0, &usglen, &up);
if (res)
return res;
- for (; p; ++sg, ksglen = sg->length,
- p = page_address(sg->page)) {
+ for (; p; sg = sg_next(sg), ksglen = sg->length,
+ p = page_address(sg_page(sg))) {
if (usglen <= 0)
break;
if (ksglen > usglen) {
@@ -2092,15 +2088,15 @@ sg_read_oxfer(Sg_request * srp, char __user *outp, int num_read_xfer)
if ((!outp) || (num_read_xfer <= 0))
return 0;
- for (k = 0; (k < schp->k_use_sg) && sg->page; ++k, ++sg) {
+ for (k = 0; (k < schp->k_use_sg) && sg_page(sg); ++k, sg = sg_next(sg)) {
num = sg->length;
if (num > num_read_xfer) {
- if (__copy_to_user(outp, page_address(sg->page),
+ if (__copy_to_user(outp, page_address(sg_page(sg)),
num_read_xfer))
return -EFAULT;
break;
} else {
- if (__copy_to_user(outp, page_address(sg->page),
+ if (__copy_to_user(outp, page_address(sg_page(sg)),
num))
return -EFAULT;
num_read_xfer -= num;
@@ -2142,7 +2138,7 @@ sg_link_reserve(Sg_fd * sfp, Sg_request * srp, int size)
SCSI_LOG_TIMEOUT(4, printk("sg_link_reserve: size=%d\n", size));
rem = size;
- for (k = 0; k < rsv_schp->k_use_sg; ++k, ++sg) {
+ for (k = 0; k < rsv_schp->k_use_sg; ++k, sg = sg_next(sg)) {
num = sg->length;
if (rem <= num) {
sfp->save_scat_len = num;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-08 16:03:44 +0000