From patchwork Mon Feb 12 16:30:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Desnoyers X-Patchwork-Id: 13553585 Received: from smtpout.efficios.com (smtpout.efficios.com [167.114.26.122]) (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 26971210E4; Mon, 12 Feb 2024 16:31:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=167.114.26.122 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707755466; cv=none; b=QXb/RydcfZLOUbTYnlLdXD5f4V1cFb7K2QOKBceAB6C8lbsy1ENwyi4hOVLHiaS3eh9YGBYhBotlyYSA4sY52yOL7JvzPXzgNfdImXX7DOnrMzO3p4OQCv5hnO5m8CCrmShr8yeKt3FKon4SyOGNo8CXjk+ABp7SRCd5zEdrHs4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707755466; c=relaxed/simple; bh=ecUyvilxXmAuEa6CVYKrKIA8K8l2tVUUJHjpsI0Te00=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VjBm2gKMVdaohw1TqmYNASuc22gl8KGgwZKuFukZp+BLkqYBXGd9A8cDqJOjNLgeXYod+URsCCEAa9Icaicp3itIxarBl2vkcLM0HBhwXLIxB4No6vOKnOfePFvGJYPgM2ixDK3SjXvVy5ERpAPokJMLcLJEXHEhjR/GNuBycH0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=efficios.com; spf=pass smtp.mailfrom=efficios.com; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b=oRgHB71P; arc=none smtp.client-ip=167.114.26.122 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=efficios.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=efficios.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b="oRgHB71P" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1707755464; bh=ecUyvilxXmAuEa6CVYKrKIA8K8l2tVUUJHjpsI0Te00=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oRgHB71P8SmaCX/tCeZteHX4/MQWsvX38WZLcuAntTjvfEvdxOg7QpPKiM9bQVwyf RsV+U02IEvhJ2YU1a0i36eAEEMIT4JK3BXnzDIqYi2uVGBkSzRpHZVyizYFBrY4wrv yQGWxe/GORBjLpbRChTfuyQZT32Quy4z7G01Z6CTjmK/33sZZz3v44j7hdbznfWTe8 3ZNCtjU8laXZNvJdYxHxQew/vONsjZs/fE1EWjjpmAVIBe4o0HLQ3ouDp0PAKNC/NR leOkRceGOfzokWkAdLU3lPjBl1kaJFjwlYsLTfacQdKe8jagU6YZWvacZYOmSf3Dvt SMemhEKFzt3sA== Received: from thinkos.internal.efficios.com (192-222-143-198.qc.cable.ebox.net [192.222.143.198]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4TYVMC6SRczYQx; Mon, 12 Feb 2024 11:31:03 -0500 (EST) From: Mathieu Desnoyers To: Dan Williams , Arnd Bergmann , Dave Chinner Cc: linux-kernel@vger.kernel.org, Mathieu Desnoyers , Andrew Morton , Linus Torvalds , Vishal Verma , Dave Jiang , Matthew Wilcox , Russell King , linux-arch@vger.kernel.org, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, dm-devel@lists.linux.dev, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, Alasdair Kergon , Mike Snitzer , Mikulas Patocka Subject: [PATCH v5 2/8] nvdimm/pmem: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Date: Mon, 12 Feb 2024 11:30:55 -0500 Message-Id: <20240212163101.19614-3-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240212163101.19614-1-mathieu.desnoyers@efficios.com> References: <20240212163101.19614-1-mathieu.desnoyers@efficios.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In preparation for checking whether the architecture has data cache aliasing within alloc_dax(), modify the error handling of nvdimm/pmem pmem_attach_disk() to treat alloc_dax() -EOPNOTSUPP failure as non-fatal. [ Based on commit "nvdimm/pmem: Fix leak on dax_add_host() failure". ] Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches") Signed-off-by: Mathieu Desnoyers Reviewed-by: Dan Williams Cc: Alasdair Kergon Cc: Mike Snitzer Cc: Mikulas Patocka Cc: Andrew Morton Cc: Linus Torvalds Cc: Dan Williams Cc: Vishal Verma Cc: Dave Jiang Cc: Matthew Wilcox Cc: Arnd Bergmann Cc: Russell King Cc: linux-arch@vger.kernel.org Cc: linux-cxl@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-xfs@vger.kernel.org Cc: dm-devel@lists.linux.dev Cc: nvdimm@lists.linux.dev --- drivers/nvdimm/pmem.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 9fe358090720..e9898457a7bd 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -560,17 +560,19 @@ static int pmem_attach_disk(struct device *dev, dax_dev = alloc_dax(pmem, &pmem_dax_ops); if (IS_ERR(dax_dev)) { rc = PTR_ERR(dax_dev); - goto out; + if (rc != -EOPNOTSUPP) + goto out; + } else { + set_dax_nocache(dax_dev); + set_dax_nomc(dax_dev); + if (is_nvdimm_sync(nd_region)) + set_dax_synchronous(dax_dev); + pmem->dax_dev = dax_dev; + rc = dax_add_host(dax_dev, disk); + if (rc) + goto out_cleanup_dax; + dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); } - set_dax_nocache(dax_dev); - set_dax_nomc(dax_dev); - if (is_nvdimm_sync(nd_region)) - set_dax_synchronous(dax_dev); - pmem->dax_dev = dax_dev; - rc = dax_add_host(dax_dev, disk); - if (rc) - goto out_cleanup_dax; - dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); rc = device_add_disk(dev, disk, pmem_attribute_groups); if (rc) goto out_remove_host;