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From: "Matias Bjørling" <m@bjorling.me>
To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: "Matias Bjørling" <m@bjorling.me>
Subject: [PATCH RFC 1/3] lightnvm: check mm before use
Date: Wed,  2 Dec 2015 13:16:21 +0100	[thread overview]
Message-ID: <1449058583-27940-1-git-send-email-m@bjorling.me> (raw)

The core can initialize I/Os before a media manager is registered with
the lightnvm subsystem. Make sure that we don't call the media manager
prematurely.

Signed-off-by: Matias Bjørling <m@bjorling.me>
---
 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


             reply	other threads:[~2015-12-02 12:16 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-02 12:16 Matias Bjørling [this message]
2015-12-02 12:16 ` [PATCH RFC 2/3] lightnvm: comments on constants Matias Bjørling
2015-12-02 12:16 ` [PATCH RFC 3/3] lightnvm: fix media mgr registration Matias Bjørling
2015-12-04  8:40   ` Wenwei Tao
2015-12-04 10:46     ` Matias Bjørling
2015-12-04  8:02 ` [PATCH RFC 1/3] lightnvm: check mm before use Wenwei Tao
2015-12-04  9:51   ` Matias Bjørling

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