From: Hyunchul Lee <hyc.lee@gmail.com>
Date: Mon, 30 Aug 2021 04:27:43 +0000 (+0900)
Subject: ksmbd: smbd: fix dma mapping error in smb_direct_post_send_data
X-Git-Tag: v5.15-rc1~34^2~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=72d6cbb533d4309734606027fe083c4edb0aa7aa;p=thirdparty%2Fkernel%2Flinux.git

ksmbd: smbd: fix dma mapping error in smb_direct_post_send_data

Becase smb direct header is mapped and msg->num_sge
already is incremented, the decrement should be
removed from the condition.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---

diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index 58f530056ac01..52b2556e76b1b 100644
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -1168,7 +1168,7 @@ static int smb_direct_post_send_data(struct smb_direct_transport *t,
 			pr_err("failed to map buffer\n");
 			ret = -ENOMEM;
 			goto err;
-		} else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES - 1) {
+		} else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES) {
 			pr_err("buffer not fitted into sges\n");
 			ret = -E2BIG;
 			ib_dma_unmap_sg(t->cm_id->device, sg, sg_cnt,