From 45e01e8de10f92ab0ae02baf23cbed93b7dae48a Mon Sep 17 00:00:00 2001
From: Jonathan Toppins <jtoppins@redhat.com>
Date: Wed, 2 Oct 2019 18:23:01 -0400
Subject: [PATCH 46/96] [netdrv] bnxt_en: Set TPA GRO mode flags on 57500 chips
 properly

Message-id: <6382b11d2a91ab884bfc45379b12c9f5d23bc48b.1570027456.git.jtoppins@redhat.com>
Patchwork-id: 276464
O-Subject: [RHEL-8.2 PATCH 39/78] bnxt_en: Set TPA GRO mode flags on 57500 chips properly.
Bugzilla: 1724766
RH-Acked-by: John Linville <linville@redhat.com>
RH-Acked-by: Jarod Wilson <jarod@redhat.com>

On 57500 chips, hardware GRO mode cannot be determined from the TPA
end, so we need to check bp->flags to determine if we are in hardware
GRO mode or not.  Modify bnxt_set_features so that the TPA flags
in bp->flags don't change until the device is closed.  This will ensure
that the fast path can safely rely on bp->flags to determine the
TPA mode.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit f45b7b78c619cd73c7ca25b68c6ba9653b8e4a0a)
Bugzilla: 1724766
Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=23809532
Tested: build, boot, basic ping
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Signed-off-by: Bruno Meneguele <bmeneg@redhat.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

Index: src/drivers/net/ethernet/broadcom/bnxt/bnxt.c
===================================================================
--- src.orig/drivers/net/ethernet/broadcom/bnxt/bnxt.c	2020-02-06 16:23:16.376507039 +0100
+++ src/drivers/net/ethernet/broadcom/bnxt/bnxt.c	2020-02-06 16:23:16.499505910 +0100
@@ -9364,7 +9364,8 @@
 	if (changes & BNXT_FLAG_TPA) {
 		update_tpa = true;
 		if ((bp->flags & BNXT_FLAG_TPA) == 0 ||
-		    (flags & BNXT_FLAG_TPA) == 0)
+		    (flags & BNXT_FLAG_TPA) == 0 ||
+		    (bp->flags & BNXT_FLAG_CHIP_P5))
 			re_init = true;
 	}
 
@@ -9374,9 +9375,8 @@
 	if (flags != bp->flags) {
 		u32 old_flags = bp->flags;
 
-		bp->flags = flags;
-
 		if (!test_bit(BNXT_STATE_OPEN, &bp->state)) {
+			bp->flags = flags;
 			if (update_tpa)
 				bnxt_set_ring_params(bp);
 			return rc;
@@ -9384,12 +9384,14 @@
 
 		if (re_init) {
 			bnxt_close_nic(bp, false, false);
+			bp->flags = flags;
 			if (update_tpa)
 				bnxt_set_ring_params(bp);
 
 			return bnxt_open_nic(bp, false, false);
 		}
 		if (update_tpa) {
+			bp->flags = flags;
 			rc = bnxt_set_tpa(bp,
 					  (flags & BNXT_FLAG_TPA) ?
 					  true : false);