From: "Matias Bjørling" <m@bjorling.me>
To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, axboe@fb.com
Cc: "Matias Bjørling" <m@bjorling.me>
Subject: [PATCH 4/9] lightnvm: check mm before use
Date: Sun, 6 Dec 2015 11:25:46 +0100 [thread overview]
Message-ID: <1449397551-16525-5-git-send-email-m@bjorling.me> (raw)
In-Reply-To: <1449397551-16525-1-git-send-email-m@bjorling.me>
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 <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
next prev parent reply other threads:[~2015-12-06 10:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-06 10:25 [PATCH 0/9] Fixes for LightNVM Matias Bjørling
2015-12-06 10:25 ` [PATCH 1/9] lightnvm: use flags in rrpc_get_blk Matias Bjørling
2015-12-06 10:25 ` [PATCH 2/9] lightnvm: put blks when luns configure failed Matias Bjørling
2015-12-06 10:25 ` [PATCH 3/9] lightnvm: refactor spin_unlock in gennvm_get_blk Matias Bjørling
2015-12-06 10:25 ` Matias Bjørling [this message]
2015-12-06 10:25 ` [PATCH 5/9] lightnvm: comments on constants Matias Bjørling
2015-12-06 10:25 ` [PATCH 6/9] lightnvm: replace req queue with nvmdev for lld Matias Bjørling
2015-12-06 10:25 ` [PATCH 7/9] lightnvm: fix media mgr registration Matias Bjørling
2015-12-06 10:25 ` [PATCH 8/9] lightnvm: prevent gennvm module unload on use Matias Bjørling
2015-12-06 10:25 ` [PATCH 9/9] lightnvm: do not compile in debugging by default Matias Bjørling
2015-12-07 16:11 ` [PATCH 0/9] Fixes for LightNVM Jens Axboe
2015-12-07 17:52 ` Matias Bjørling
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