linux-kernel - [PATCH 5/9] nvme/pci: add known admin effects to augument admin effects log page

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Date:   Tue, 19 Mar 2019 16:41:12 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     linux-nvme@...ts.infradead.org
Cc:     Maxim Levitsky <mlevitsk@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Jens Axboe <axboe@...com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Keith Busch <keith.busch@...el.com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Kirti Wankhede <kwankhede@...dia.com>,
        "David S . Miller" <davem@...emloft.net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        "Paul E . McKenney " <paulmck@...ux.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Liang Cunming <cunming.liang@...el.com>,
        Liu Changpeng <changpeng.liu@...el.com>,
        Fam Zheng <fam@...hon.net>, Amnon Ilan <ailan@...hat.com>,
        John Ferlan <jferlan@...hat.com>
Subject: [PATCH 5/9] nvme/pci: add known admin effects to augument admin effects log page

Add known admin effects even if hardware has known admin effects page,
since hardware can't be ever trusted to report sane values.
(on my Intel DC P3700, it reports no side effects for namespace format)

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 drivers/nvme/host/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index cf9de026cb93..e1cef428c7e9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1260,8 +1260,8 @@ static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
 
 	if (ctrl->effects)
 		effects = le32_to_cpu(ctrl->effects->acs[opcode]);
-	else
-		effects = nvme_known_admin_effects(opcode);
+
+	effects |= nvme_known_admin_effects(opcode);
 
 	/*
 	 * For simplicity, IO to all namespaces is quiesced even if the command
-- 
2.17.2