Linux-RDMA Archive on lore.kernel.org
 help / color / Atom feed
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Israel Rukshin <israelr@mellanox.com>,
	Max Gurtovoy <maxg@mellanox.com>,
	Sagi Grimberg <sagi@grimberg.me>,
	Jason Gunthorpe <jgg@mellanox.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 123/671] IB/iser: Pass the correct number of entries for dma mapped SGL
Date: Thu, 16 Jan 2020 11:50:32 -0500
Message-ID: <20200116165940.10720-6-sashal@kernel.org> (raw)
In-Reply-To: <20200116165940.10720-1-sashal@kernel.org>

From: Israel Rukshin <israelr@mellanox.com>

[ Upstream commit 57b26497fabe1b9379b59fbc7e35e608e114df16 ]

ib_dma_map_sg() augments the SGL into a 'dma mapped SGL'. This process may
change the number of entries and the lengths of each entry.

Code that touches dma_address is iterating over the 'dma mapped SGL' and
must use dma_nents which returned from ib_dma_map_sg().

ib_sg_to_pages() and ib_map_mr_sg() are using dma_address so they must use
dma_nents.

Fixes: 39405885005a ("IB/iser: Port to new fast registration API")
Fixes: bfe066e256d5 ("IB/iser: Reuse ib_sg_to_pages")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/ulp/iser/iser_memory.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index 009be8889d71..379bc0dfc388 100644
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -240,8 +240,8 @@ int iser_fast_reg_fmr(struct iscsi_iser_task *iser_task,
 	page_vec->npages = 0;
 	page_vec->fake_mr.page_size = SIZE_4K;
 	plen = ib_sg_to_pages(&page_vec->fake_mr, mem->sg,
-			      mem->size, NULL, iser_set_page);
-	if (unlikely(plen < mem->size)) {
+			      mem->dma_nents, NULL, iser_set_page);
+	if (unlikely(plen < mem->dma_nents)) {
 		iser_err("page vec too short to hold this SG\n");
 		iser_data_buf_dump(mem, device->ib_device);
 		iser_dump_page_vec(page_vec);
@@ -451,10 +451,10 @@ static int iser_fast_reg_mr(struct iscsi_iser_task *iser_task,
 
 	ib_update_fast_reg_key(mr, ib_inc_rkey(mr->rkey));
 
-	n = ib_map_mr_sg(mr, mem->sg, mem->size, NULL, SIZE_4K);
-	if (unlikely(n != mem->size)) {
+	n = ib_map_mr_sg(mr, mem->sg, mem->dma_nents, NULL, SIZE_4K);
+	if (unlikely(n != mem->dma_nents)) {
 		iser_err("failed to map sg (%d/%d)\n",
-			 n, mem->size);
+			 n, mem->dma_nents);
 		return n < 0 ? n : -EINVAL;
 	}
 
-- 
2.20.1


       reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116165940.10720-1-sashal@kernel.org>
2020-01-16 16:50 ` Sasha Levin [this message]
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 126/671] IB/mlx5: Don't override existing ip_protocol Sasha Levin
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 133/671] net/mlx5: Take lock with IRQs disabled to avoid deadlock Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 167/671] iw_cxgb4: use tos when importing the endpoint Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 168/671] iw_cxgb4: use tos when finding ipv6 routes Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 178/671] RDMA/mlx5: Fix memory leak in case we fail to add an IB device Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 201/671] net/mlx5: Delete unused FPGA QPN variable Sasha Levin
2020-01-16 16:52 ` [PATCH AUTOSEL 4.19 243/671] net/mlx5: Fix multiple updates of steering rules in parallel Sasha Levin
2020-01-16 16:52 ` [PATCH AUTOSEL 4.19 244/671] net/mlx5e: IPoIB, Fix RX checksum statistics update Sasha Levin

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200116165940.10720-6-sashal@kernel.org \
    --to=sashal@kernel.org \
    --cc=israelr@mellanox.com \
    --cc=jgg@mellanox.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=maxg@mellanox.com \
    --cc=sagi@grimberg.me \
    --cc=stable@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-RDMA Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-rdma/0 linux-rdma/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-rdma linux-rdma/ https://lore.kernel.org/linux-rdma \
		linux-rdma@vger.kernel.org
	public-inbox-index linux-rdma

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-rdma


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git