patch 'common/cpt: fix build with GCC 12' has been queued to stable release 21.11.2

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/27/22. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/978835ed87a361a24e0c4424f1a352d13fb7bfac

Thanks.

Kevin

---
>From 978835ed87a361a24e0c4424f1a352d13fb7bfac Mon Sep 17 00:00:00 2001
From: Ankur Dwivedi <adwivedi at marvell.com>
Date: Fri, 17 Jun 2022 19:09:29 +0530
Subject: [PATCH] common/cpt: fix build with GCC 12
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

[ upstream commit 3aa16821ab3e0a21052880fbf4dcb76801380c31 ]

The following warning is observed with GCC 12 compilation:

In function ‘fill_sg_comp_from_iov’,
    inlined from ‘cpt_zuc_snow3g_enc_prep’ at
        ../drivers/common/cpt/cpt_ucode.h:1672:9,
    inlined from ‘cpt_fc_enc_hmac_prep’ at
        ../drivers/common/cpt/cpt_ucode.h:2472:3,
    inlined from ‘fill_digest_params’ at
        ../drivers/common/cpt/cpt_ucode.h:3548:14,
    inlined from ‘otx_cpt_enq_single_sym’ at
        ../drivers/crypto/octeontx/otx_cryptodev_ops.c:541:9,
    inlined from ‘otx_cpt_enq_single_sym_sessless’ at
        ../drivers/crypto/octeontx/otx_cryptodev_ops.c:584:8,
    inlined from ‘otx_cpt_enq_single’ at
        ../drivers/crypto/octeontx/otx_cryptodev_ops.c:611:11,
    inlined from ‘otx_cpt_pkt_enqueue’ at
        ../drivers/crypto/octeontx/otx_cryptodev_ops.c:643:9,
    inlined from ‘otx_cpt_enqueue_sym’ at
        ../drivers/crypto/octeontx/otx_cryptodev_ops.c:668:9:
../drivers/common/cpt/cpt_ucode.h:415:36: warning: array subscript 0 is
outside array bounds of ‘buf_ptr_t[0]’ {aka ‘struct buf_ptr[]’}
[-Warray-bounds]
  415 |                         e_dma_addr = bufs[j].dma_addr;
      |                         ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
../drivers/common/cpt/cpt_ucode.h:416:48: warning: array subscript 0 is
outside array bounds of ‘buf_ptr_t[0]’ {aka ‘struct buf_ptr[]’}
[-Warray-bounds]
  416 |                         e_len = (size > bufs[j].size) ?
      |                                         ~~~~~~~^~~~~

This patch resolves the warning.

Bugzilla ID: 861
Fixes: 9be415daf469 ("common/cpt: add common defines for microcode")
Fixes: b74652f3a91f ("common/cpt: add microcode interface for encryption")

Signed-off-by: Ankur Dwivedi <adwivedi at marvell.com>
Reviewed-by: Anoob Joseph <anoobj at marvell.com>
Reviewed-by: Jerin Jacob <jerinj at marvell.com>
Tested-by: David Marchand <david.marchand at redhat.com>
---
 drivers/common/cpt/cpt_mcode_defines.h |  2 +-
 drivers/common/cpt/cpt_ucode.h         | 21 ++++++++++-----------
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/common/cpt/cpt_mcode_defines.h b/drivers/common/cpt/cpt_mcode_defines.h
index f16ee44297..e6dcb7674c 100644
--- a/drivers/common/cpt/cpt_mcode_defines.h
+++ b/drivers/common/cpt/cpt_mcode_defines.h
@@ -388,5 +388,5 @@ typedef struct buf_ptr {
 typedef struct{
 	int buf_cnt;
-	buf_ptr_t bufs[0];
+	buf_ptr_t bufs[];
 } iov_ptr_t;
 
diff --git a/drivers/common/cpt/cpt_ucode.h b/drivers/common/cpt/cpt_ucode.h
index e1f2f6005d..22aabab6ac 100644
--- a/drivers/common/cpt/cpt_ucode.h
+++ b/drivers/common/cpt/cpt_ucode.h
@@ -395,25 +395,24 @@ fill_sg_comp_from_iov(sg_comp_t *list,
 	uint32_t extra_len = extra_buf ? extra_buf->size : 0;
 	uint32_t size = *psize;
-	buf_ptr_t *bufs;
 
-	bufs = from->bufs;
 	for (j = 0; (j < from->buf_cnt) && size; j++) {
+		phys_addr_t dma_addr = from->bufs[j].dma_addr;
+		uint32_t buf_sz = from->bufs[j].size;
+		sg_comp_t *to = &list[i >> 2];
 		phys_addr_t e_dma_addr;
 		uint32_t e_len;
-		sg_comp_t *to = &list[i >> 2];
 
 		if (unlikely(from_offset)) {
-			if (from_offset >= bufs[j].size) {
-				from_offset -= bufs[j].size;
+			if (from_offset >= buf_sz) {
+				from_offset -= buf_sz;
 				continue;
 			}
-			e_dma_addr = bufs[j].dma_addr + from_offset;
-			e_len = (size > (bufs[j].size - from_offset)) ?
-				(bufs[j].size - from_offset) : size;
+			e_dma_addr = dma_addr + from_offset;
+			e_len = (size > (buf_sz - from_offset)) ?
+				(buf_sz - from_offset) : size;
 			from_offset = 0;
 		} else {
-			e_dma_addr = bufs[j].dma_addr;
-			e_len = (size > bufs[j].size) ?
-				bufs[j].size : size;
+			e_dma_addr = dma_addr;
+			e_len = (size > buf_sz) ? buf_sz : size;
 		}
 
-- 
2.34.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-06-24 15:51:09.300692427 +0100
+++ 0011-common-cpt-fix-build-with-GCC-12.patch	2022-06-24 15:51:08.855984039 +0100
@@ -1 +1 @@
-From 3aa16821ab3e0a21052880fbf4dcb76801380c31 Mon Sep 17 00:00:00 2001
+From 978835ed87a361a24e0c4424f1a352d13fb7bfac Mon Sep 17 00:00:00 2001
@@ -8,0 +9,2 @@
+[ upstream commit 3aa16821ab3e0a21052880fbf4dcb76801380c31 ]
+
@@ -44 +45,0 @@
-Cc: stable at dpdk.org