Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754128AbbLFK0P (ORCPT ); Sun, 6 Dec 2015 05:26:15 -0500 Received: from mail-wm0-f44.google.com ([74.125.82.44]:36828 "EHLO mail-wm0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753879AbbLFK0K (ORCPT ); Sun, 6 Dec 2015 05:26:10 -0500 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, axboe@fb.com Cc: =?UTF-8?q?Matias=20Bj=C3=B8rling?= Subject: [PATCH 4/9] lightnvm: check mm before use Date: Sun, 6 Dec 2015 11:25:46 +0100 Message-Id: <1449397551-16525-5-git-send-email-m@bjorling.me> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1449397551-16525-1-git-send-email-m@bjorling.me> References: <1449397551-16525-1-git-send-email-m@bjorling.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1082 Lines: 30 The core can may issue I/Os before a media manager is registered with the lightnvm subsystem. Make sure that we don't call the media manager ->end_io prematurely with a null pointer. Signed-off-by: Matias Bjørling --- drivers/nvme/host/lightnvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index 06c3364..762c9a7 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -455,7 +455,7 @@ static void nvme_nvm_end_io(struct request *rq, int error) struct nvm_rq *rqd = rq->end_io_data; struct nvm_dev *dev = rqd->dev; - if (dev->mt->end_io(rqd, error)) + if (dev->mt && dev->mt->end_io(rqd, error)) pr_err("nvme: err status: %x result: %lx\n", rq->errors, (unsigned long)rq->special); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/