From patchwork Mon Jun 7 23:31:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 12304863 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) (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 3B5E970 for ; Mon, 7 Jun 2021 23:31:04 +0000 (UTC) IronPort-SDR: gal26PsbYsaO2A4mew/qpWHpjj8cTlvgTjD7N467r85QJTZsBiKGrGeGveze5/wkW6NuVgT54K muoprrwJ63AQ== X-IronPort-AV: E=McAfee;i="6200,9189,10008"; a="265888276" X-IronPort-AV: E=Sophos;i="5.83,256,1616482800"; d="scan'208";a="265888276" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2021 16:31:03 -0700 IronPort-SDR: W3dspCDkbCxzCDbE4kaCmB4/JnDzW5+/WmymGvff2AqghGNL1jAlcNvGlBg8Dfu9NFjHGx+iW/ LSQyds8najVA== X-IronPort-AV: E=Sophos;i="5.83,256,1616482800"; d="scan'208";a="449288977" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.25]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2021 16:31:03 -0700 Subject: [PATCH] libnvdimm/pmem: Fix blk_cleanup_disk() usage From: Dan Williams To: axboe@kernel.dk Cc: Sachin Sant , Christoph Hellwig , Ulf Hansson , nvdimm@lists.linux.dev, linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Mon, 07 Jun 2021 16:31:02 -0700 Message-ID: <162310861219.1571453.6561642225122047071.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-3-g996c X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The queue_to_disk() helper can not be used after del_gendisk() communicate @disk via the pgmap->owner. Reported-by: Sachin Sant Fixes: 87eb73b2ca7c ("nvdimm-pmem: convert to blk_alloc_disk/blk_cleanup_disk") Cc: Christoph Hellwig Cc: Ulf Hansson Cc: Jens Axboe Signed-off-by: Dan Williams --- Jens, Please take or fold this into your tree after Sachin has a chance to test it out. It's passing my tests. drivers/nvdimm/pmem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 31f3c4bd6f72..fc6b78dd2d24 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -337,8 +337,9 @@ static void pmem_pagemap_cleanup(struct dev_pagemap *pgmap) { struct request_queue *q = container_of(pgmap->ref, struct request_queue, q_usage_counter); + struct pmem_device *pmem = pgmap->owner; - blk_cleanup_disk(queue_to_disk(q)); + blk_cleanup_disk(pmem->disk); } static void pmem_release_queue(void *pgmap) @@ -427,6 +428,7 @@ static int pmem_attach_disk(struct device *dev, q = disk->queue; pmem->disk = disk; + pmem->pgmap.owner = pmem; pmem->pfn_flags = PFN_DEV; pmem->pgmap.ref = &q->q_usage_counter; if (is_nd_pfn(dev)) {