From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 688A5212DD37D for ; Fri, 9 Aug 2019 00:48:10 -0700 (PDT) From: "Aneesh Kumar K.V" Subject: [PATCH v5 1/4] nvdimm: Consider probe return -EOPNOTSUPP as success Date: Fri, 9 Aug 2019 13:15:17 +0530 Message-Id: <20190809074520.27115-2-aneesh.kumar@linux.ibm.com> In-Reply-To: <20190809074520.27115-1-aneesh.kumar@linux.ibm.com> References: <20190809074520.27115-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: dan.j.williams@intel.com Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" , linux-nvdimm@lists.01.org List-ID: This patch add -EOPNOTSUPP as return from probe callback to indicate we were not able to initialize a namespace due to pfn superblock feature/version mismatch. We want to consider this a probe success so that we can create new namesapce seed and there by avoid marking the failed namespace as the seed namespace. Signed-off-by: Aneesh Kumar K.V --- drivers/nvdimm/bus.c | 2 +- drivers/nvdimm/pmem.c | 26 ++++++++++++++++++++++---- 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 798c5c4aea9c..16c35e6446a7 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -95,7 +95,7 @@ static int nvdimm_bus_probe(struct device *dev) rc = nd_drv->probe(dev); debug_nvdimm_unlock(dev); - if (rc == 0) + if (rc == 0 || rc == -EOPNOTSUPP) nd_region_probe_success(nvdimm_bus, dev); else nd_region_disable(nvdimm_bus, dev); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4c121dd03dd9..3f498881dd28 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -490,6 +490,7 @@ static int pmem_attach_disk(struct device *dev, static int nd_pmem_probe(struct device *dev) { + int ret; struct nd_namespace_common *ndns; ndns = nvdimm_namespace_common_probe(dev); @@ -505,12 +506,29 @@ static int nd_pmem_probe(struct device *dev) if (is_nd_pfn(dev)) return pmem_attach_disk(dev, ndns); - /* if we find a valid info-block we'll come back as that personality */ - if (nd_btt_probe(dev, ndns) == 0 || nd_pfn_probe(dev, ndns) == 0 - || nd_dax_probe(dev, ndns) == 0) + ret = nd_btt_probe(dev, ndns); + if (ret == 0) return -ENXIO; + else if (ret == -EOPNOTSUPP) + return ret; - /* ...otherwise we're just a raw pmem device */ + ret = nd_pfn_probe(dev, ndns); + if (ret == 0) + return -ENXIO; + else if (ret == -EOPNOTSUPP) + return ret; + + ret = nd_dax_probe(dev, ndns); + if (ret == 0) + return -ENXIO; + else if (ret == -EOPNOTSUPP) + return ret; + /* + * We have two failure conditions here, there is no + * info reserver block or we found a valid info reserve block + * but failed to initialize the pfn superblock. + * Don't create a raw pmem disk for the second case. + */ return pmem_attach_disk(dev, ndns); } -- 2.21.0 _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm