From patchwork Fri Jul 19 01:58:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhijian Li (Fujitsu)" X-Patchwork-Id: 13736817 Received: from esa11.hc1455-7.c3s2.iphmx.com (esa11.hc1455-7.c3s2.iphmx.com [207.54.90.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3FF615D1 for ; Fri, 19 Jul 2024 01:58:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.54.90.137 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721354343; cv=none; b=qV9uu9DTA77sG2/6GxoO+6wtbgLSuYb+V5/h0WMocoFnW2ZHYnAQIss0A/X9xsnEGSnYyvkfB9bN8LV90DQ55weddfWBzATRoUtKwP2gt998WBZ5+uP9A7ekluMMO5TJBfpH79Va7c3kPc85UzJx0Y5ieXGA57y7YIA6inrigY0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721354343; c=relaxed/simple; bh=cGDvTByA6KTed0UxScYm3+Rd0JNJ+VCZM7hXObyA1MA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PVT/fa6MKKkFrHPkmWk84M/o3lw3DIbJ9kZhKu/DsouKtF46gK8jLmtRxR21UrQb0e6aU+VDaUWvxFEZyfR6h8H2A/YHhF6fCJd2gGOYj99054U0+J5X8LZ7724WY2vmp/Wl2RFouseTDop2R8tWXspF1u9lJ6gFA305tYjFzlo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fujitsu.com; spf=pass smtp.mailfrom=fujitsu.com; dkim=pass (2048-bit key) header.d=fujitsu.com header.i=@fujitsu.com header.b=bJ1BOdqr; arc=none smtp.client-ip=207.54.90.137 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fujitsu.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fujitsu.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fujitsu.com header.i=@fujitsu.com header.b="bJ1BOdqr" DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=fujitsu.com; i=@fujitsu.com; q=dns/txt; s=fj2; t=1721354341; x=1752890341; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cGDvTByA6KTed0UxScYm3+Rd0JNJ+VCZM7hXObyA1MA=; b=bJ1BOdqrhfOGjJzakrkze9Z98QE6X8rwVGQJ+CQmeL45ZjyXa745Wcek xrfGgoVYCR1ePP9jtEUETdG0S8IXvBR8wfB4x7OzoJKQ5SEFl4sRmBjzr dWMkKTOzpizuiZ+IhOpASMePUObBC/p96P/4cdS2wHcJ91KQq4XziCuhw vc2uSjsy8p/QsNJMI7j3HLy8GrSGa4Tqxl1VVHni08eU1SY/HoWwcVUDz +PzpJwbdNWmKpGZuHDsveJWwK5F7BaTL2mzZDzLiuUygxOas8K9hvjfcX KemtcJpvhRp18RwdUsmpBmxBhZ8108sHZPSNrTTvu1dTX0+G0PFXgEzld Q==; X-IronPort-AV: E=McAfee;i="6700,10204,11137"; a="147249308" X-IronPort-AV: E=Sophos;i="6.09,219,1716217200"; d="scan'208";a="147249308" Received: from unknown (HELO yto-r1.gw.nic.fujitsu.com) ([218.44.52.217]) by esa11.hc1455-7.c3s2.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jul 2024 10:58:52 +0900 Received: from yto-m1.gw.nic.fujitsu.com (yto-nat-yto-m1.gw.nic.fujitsu.com [192.168.83.64]) by yto-r1.gw.nic.fujitsu.com (Postfix) with ESMTP id 21379DB3CD for ; Fri, 19 Jul 2024 10:58:49 +0900 (JST) Received: from kws-ab4.gw.nic.fujitsu.com (kws-ab4.gw.nic.fujitsu.com [192.51.206.22]) by yto-m1.gw.nic.fujitsu.com (Postfix) with ESMTP id 61AD2D1988 for ; Fri, 19 Jul 2024 10:58:48 +0900 (JST) Received: from edo.cn.fujitsu.com (edo.cn.fujitsu.com [10.167.33.5]) by kws-ab4.gw.nic.fujitsu.com (Postfix) with ESMTP id EF1C9224979 for ; Fri, 19 Jul 2024 10:58:47 +0900 (JST) Received: from localhost.localdomain (unknown [10.167.226.45]) by edo.cn.fujitsu.com (Postfix) with ESMTP id 736D31A000C; Fri, 19 Jul 2024 09:58:47 +0800 (CST) From: Li Zhijian To: nvdimm@lists.linux.dev Cc: dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, linux-kernel@vger.kernel.org, Li Zhijian Subject: [PATCH v2 2/2] nvdimm: Remove dead code for ENODEV checking in scan_labels() Date: Fri, 19 Jul 2024 09:58:36 +0800 Message-Id: <20240719015836.1060677-2-lizhijian@fujitsu.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240719015836.1060677-1-lizhijian@fujitsu.com> References: <20240719015836.1060677-1-lizhijian@fujitsu.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-TM-AS-Product-Ver: IMSS-9.1.0.1417-9.0.0.1002-28538.002 X-TM-AS-User-Approved-Sender: Yes X-TMASE-Version: IMSS-9.1.0.1417-9.0.1002-28538.002 X-TMASE-Result: 10--6.042500-10.000000 X-TMASE-MatchedRID: wJuAbHRzrYfH3ZCJRIiNpAXGi/7cli9jG3SoAWcU42VD0XHWdCmZPCXj tnu2lwmLkPI1/ZdqoS0pVSN22QMNpsyvuTCA7wzlolVO7uyOCDXBOVz0Jwcxl6vCrG0TnfVUIb5 NpqK++5qbpZ8QUEHE+lcnoO4Nx+lojejKCMx4rt64u3nS+3EEDpki3iIBA3o/vy9ABIQaa1mjxY yRBa/qJcFwgTvxipFa9xS3mVzWUuA4wHSyGpeEeiw2x397pFEmTHLkTUFitAOaKHuLVl3J1P0zo l91xrHXEgajmqqPXvQ= X-TMASE-SNAP-Result: 1.821001.0001-0-1-22:0,33:0,34:0-0 The only way create_namespace_pmem() returns an ENODEV code is if select_pmem_id(nd_region, &uuid) returns ENODEV when its 2nd parameter is a null pointer. However, this is impossible because &uuid is always valid. Furthermore, create_namespace_pmem() is the only user of select_pmem_id(), it's safe to remove the 'return -ENODEV' branch. Signed-off-by: Li Zhijian --- V2: new patch. It's found when I'm Reviewing/tracing the return values of create_namespace_pmem() --- drivers/nvdimm/namespace_devs.c | 9 --------- 1 file changed, 9 deletions(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 28c9afc01dca..21020cd16117 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1612,9 +1612,6 @@ static int select_pmem_id(struct nd_region *nd_region, const uuid_t *pmem_id) { int i; - if (!pmem_id) - return -ENODEV; - for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); @@ -1790,9 +1787,6 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region, case -EINVAL: dev_dbg(&nd_region->dev, "invalid label(s)\n"); break; - case -ENODEV: - dev_dbg(&nd_region->dev, "label not found\n"); - break; default: dev_dbg(&nd_region->dev, "unexpected err: %d\n", rc); break; @@ -1974,9 +1968,6 @@ static struct device **scan_labels(struct nd_region *nd_region) case -EAGAIN: /* skip invalid labels */ continue; - case -ENODEV: - /* fallthrough to seed creation */ - break; default: goto err; }