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[76.23.2.87]) by smtp.googlemail.com with ESMTPSA id s15sm5196974wrb.22.2021.09.12.11.55.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Sep 2021 11:55:16 -0700 (PDT) From: Anton Eidelman X-Google-Original-From: Anton Eidelman To: linux-nvme@lists.infradead.org, hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, axboe@fb.com Cc: Anton Eidelman Subject: [PATCH 1/3] nvme/multipath: fix failure to update ns ana state Date: Sun, 12 Sep 2021 12:54:57 -0600 Message-Id: <20210912185459.13496-2-anton@lightbitslabs.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210912185459.13496-1-anton@lightbitslabs.com> References: <20210912185459.13496-1-anton@lightbitslabs.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210912_115519_068511_92C3B32F X-CRM114-Status: GOOD ( 12.75 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org nvme_update_ana_state() has a deficiency that results in failure to update the ana state for a namespace in the following case: nsid's in ctrl->namespaces: 1, 3, 4 nsid's in desc->nsids: 1, 2, 3, 4 Loop iteration 0: ns index = 0, n = 0, ns->head->ns_id = 1, nsid = 1, MATCH. Loop iteration 1: ns index = 1, n = 1, ns->head->ns_id = 3, nsid = 2, NO MATCH. Loop iteration 2: ns index = 2, n = 2, ns->head->ns_id = 4, nsid = 4, MATCH. Result: missed nsid=3 and did not update its ana state. Solution: when ns->head->ns_id is higher than nsid, increment n and RETRY with the SAME ns. Signed-off-by: Anton Eidelman --- drivers/nvme/host/multipath.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 5d7bc58a27bd..e8ccdd398f78 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -600,14 +600,17 @@ static int nvme_update_ana_state(struct nvme_ctrl *ctrl, down_read(&ctrl->namespaces_rwsem); list_for_each_entry(ns, &ctrl->namespaces, list) { - unsigned nsid = le32_to_cpu(desc->nsids[n]); - + unsigned nsid; +again: + nsid = le32_to_cpu(desc->nsids[n]); if (ns->head->ns_id < nsid) continue; if (ns->head->ns_id == nsid) nvme_update_ns_ana_state(desc, ns); if (++n == nr_nsids) break; + if (ns->head->ns_id > nsid) + goto again; } up_read(&ctrl->namespaces_rwsem); return 0; -- 2.25.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme