[dpdk-stable] patch 'event/octeontx2: fix device reconfigure for single slot' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/eb30365e9ec6ee135884922052afdf8225247eaa

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From eb30365e9ec6ee135884922052afdf8225247eaa Mon Sep 17 00:00:00 2001
From: Harman Kalra <hkalra at marvell.com>
Date: Mon, 5 Apr 2021 21:54:15 +0530
Subject: [PATCH] event/octeontx2: fix device reconfigure for single slot
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit 340d22cdd14802de3f80859a940dfa178b0de7ca ]

When device is re-configured, memory allocated for work slot is freed
and new memory is allocated. Due to this we may loose some important
configurations/mappings done with initial work slot memory.

For example, whenever rte_event_eth_tx_adapter_queue_add is called
some important meta i.e. txq handle is stored in work slot structure.
If device gets reconfigured after this tx adaptor add, txq to work
slot mapping will be lost resulting in seg fault during packet
processing, as txq handle could not be retrieved from work slot.

Fixes: 67b5f4686459 ("event/octeontx2: add port config functions")

Signed-off-by: Harman Kalra <hkalra at marvell.com>
---
 drivers/event/octeontx2/otx2_evdev.c | 34 +++++++++++++---------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/event/octeontx2/otx2_evdev.c b/drivers/event/octeontx2/otx2_evdev.c
index 0fe014c24a..3afb5a30e7 100644
--- a/drivers/event/octeontx2/otx2_evdev.c
+++ b/drivers/event/octeontx2/otx2_evdev.c
@@ -883,29 +883,27 @@ sso_configure_ports(const struct rte_eventdev *event_dev)
 		struct otx2_ssogws *ws;
 		uintptr_t base;
 
-		/* Free memory prior to re-allocation if needed */
 		if (event_dev->data->ports[i] != NULL) {
 			ws = event_dev->data->ports[i];
-			rte_free(ssogws_get_cookie(ws));
-			ws = NULL;
-		}
+		} else {
+			/* Allocate event port memory */
+			ws = rte_zmalloc_socket("otx2_sso_ws",
+						sizeof(struct otx2_ssogws) +
+						RTE_CACHE_LINE_SIZE,
+						RTE_CACHE_LINE_SIZE,
+						event_dev->data->socket_id);
+			if (ws == NULL) {
+				otx2_err("Failed to alloc memory for port=%d",
+					 i);
+				rc = -ENOMEM;
+				break;
+			}
 
-		/* Allocate event port memory */
-		ws = rte_zmalloc_socket("otx2_sso_ws",
-					sizeof(struct otx2_ssogws) +
-					RTE_CACHE_LINE_SIZE,
-					RTE_CACHE_LINE_SIZE,
-					event_dev->data->socket_id);
-		if (ws == NULL) {
-			otx2_err("Failed to alloc memory for port=%d", i);
-			rc = -ENOMEM;
-			break;
+			/* First cache line is reserved for cookie */
+			ws = (struct otx2_ssogws *)
+				((uint8_t *)ws + RTE_CACHE_LINE_SIZE);
 		}
 
-		/* First cache line is reserved for cookie */
-		ws = (struct otx2_ssogws *)
-			((uint8_t *)ws + RTE_CACHE_LINE_SIZE);
-
 		ws->port = i;
 		base = dev->bar2 + (RVU_BLOCK_ADDR_SSOW << 20 | i << 12);
 		sso_set_port_ops(ws, base);
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:30.929227500 +0800
+++ 0168-event-octeontx2-fix-device-reconfigure-for-single-sl.patch	2021-05-10 23:59:26.610000000 +0800
@@ -1 +1 @@
-From 340d22cdd14802de3f80859a940dfa178b0de7ca Mon Sep 17 00:00:00 2001
+From eb30365e9ec6ee135884922052afdf8225247eaa Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit 340d22cdd14802de3f80859a940dfa178b0de7ca ]
@@ -17 +19,0 @@
-Cc: stable at dpdk.org
@@ -25 +27 @@
-index 770a801c4e..cdadbb2b21 100644
+index 0fe014c24a..3afb5a30e7 100644
@@ -28 +30 @@
-@@ -885,29 +885,27 @@ sso_configure_ports(const struct rte_eventdev *event_dev)
+@@ -883,29 +883,27 @@ sso_configure_ports(const struct rte_eventdev *event_dev)