[PATCH v2 10/21] RDS: Make use of the new sg_map helper function

[Logan Gunthorpe]

Straightforward conversion except there's no error path, so we
make use of SG_MAP_MUST_NOT_FAIL which may BUG_ON in certain cases
in the future.

Signed-off-by: Logan Gunthorpe <log...@deltatee.com>
Cc: Santosh Shilimkar <santosh.shilim...@oracle.com>
Cc: "David S. Miller" <da...@davemloft.net>
---
 net/rds/ib_recv.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index e10624a..c665689 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -800,10 +800,10 @@ static void rds_ib_cong_recv(struct rds_connection *conn,
 
                to_copy = min(RDS_FRAG_SIZE - frag_off, PAGE_SIZE - map_off);
                BUG_ON(to_copy & 7); /* Must be 64bit aligned. */
+               addr = sg_map(&frag->f_sg, 0,
+                             SG_KMAP_ATOMIC | SG_MAP_MUST_NOT_FAIL);
 
-               addr = kmap_atomic(sg_page(&frag->f_sg));
-
-               src = addr + frag->f_sg.offset + frag_off;
+               src = addr + frag_off;
                dst = (void *)map->m_page_addrs[map_page] + map_off;
                for (k = 0; k < to_copy; k += 8) {
                        /* Record ports that became uncongested, ie
@@ -811,7 +811,7 @@ static void rds_ib_cong_recv(struct rds_connection *conn,
                        uncongested |= ~(*src) & *dst;
                        *dst++ = *src++;
                }
-               kunmap_atomic(addr);
+               sg_unmap(&frag->f_sg, addr, 0, SG_KMAP_ATOMIC);
 
                copied += to_copy;
 
-- 
2.1.4