patch 'common/cnxk: reset stale values on error debug registers' has been queued to stable release 21.11.1

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/26/22. 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/cfcdf00068b3c0740908af4ae1e5f7af8fc8a90e

Thanks.

Kevin

---
>From cfcdf00068b3c0740908af4ae1e5f7af8fc8a90e Mon Sep 17 00:00:00 2001
From: Harman Kalra <hkalra at marvell.com>
Date: Fri, 21 Jan 2022 17:34:18 +0530
Subject: [PATCH] common/cnxk: reset stale values on error debug registers

[ upstream commit 9b7198ea6d2c9b141b92e11c296f156678e1a781 ]

LF's error debug registers like NIX_LF_SQ_OP_ERR_DBG,
NIX_LF_MNQ_ERR_DBG, NIX_LF_SEND_ERR_DBG captures debug
info for an error detected during LMT operation or meta
enqueue or after meta enqueue granted respectively. HW
sets a valid bit when info is captured and SW is expected
to clear this valid bit by writing 1, else these registers
will show stale values of first interrupt when occurred and
will never update with subsequent interrupts.

Fixes: f6d567b03d28 ("common/cnxk: support NIX IRQ")

Signed-off-by: Harman Kalra <hkalra at marvell.com>
Acked-by: Jerin Jacob <jerinj at marvell.com>
---
 drivers/common/cnxk/roc_nix_irq.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/common/cnxk/roc_nix_irq.c b/drivers/common/cnxk/roc_nix_irq.c
index a5cd9d4b02..7dcd533ea9 100644
--- a/drivers/common/cnxk/roc_nix_irq.c
+++ b/drivers/common/cnxk/roc_nix_irq.c
@@ -203,7 +203,10 @@ nix_lf_sq_debug_reg(struct nix *nix, uint32_t off)
 
 	reg = plt_read64(nix->base + off);
-	if (reg & BIT_ULL(44))
+	if (reg & BIT_ULL(44)) {
 		plt_err("SQ=%d err_code=0x%x", (int)((reg >> 8) & 0xfffff),
 			(uint8_t)(reg & 0xff));
+		/* Clear valid bit */
+		plt_write64(BIT_ULL(44), nix->base + off);
+	}
 }
 
-- 
2.34.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-21 15:22:46.455044239 +0000
+++ 0084-common-cnxk-reset-stale-values-on-error-debug-regist.patch	2022-02-21 15:22:44.174704312 +0000
@@ -1 +1 @@
-From 9b7198ea6d2c9b141b92e11c296f156678e1a781 Mon Sep 17 00:00:00 2001
+From cfcdf00068b3c0740908af4ae1e5f7af8fc8a90e Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 9b7198ea6d2c9b141b92e11c296f156678e1a781 ]
+
@@ -16 +17,0 @@
-Cc: stable at dpdk.org