linux-kernel - [PATCH 04/18] lightnvm: pblk: check for failed mempool alloc.

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Message-Id: <1504695071-25928-5-git-send-email-javier@cnexlabs.com>
Date:   Wed,  6 Sep 2017 12:50:57 +0200
From:   "Javier González" <jg@...htnvm.io>
To:     mb@...htnvm.io, axboe@...com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>,
        Matias Bjørling <matias@...xlabs.com>
Subject: [PATCH 04/18] lightnvm: pblk: check for failed mempool alloc.

Check for failed mempool allocations and act accordingly.

Signed-off-by: Javier González <javier@...xlabs.com>
Signed-off-by: Matias Bjørling <matias@...xlabs.com>
---
 drivers/lightnvm/pblk-core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index e3997abdf740..11a684162a5d 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -165,6 +165,8 @@ struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw)
 	}
 
 	rqd = mempool_alloc(pool, GFP_KERNEL);
+	if (!rqd)
+		return NULL;
 	memset(rqd, 0, rq_size);
 
 	return rqd;
@@ -1478,6 +1480,8 @@ int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
 	int err;
 
 	rqd = mempool_alloc(pblk->g_rq_pool, GFP_KERNEL);
+	if (!rqd)
+		return -ENOMEM;
 	memset(rqd, 0, pblk_g_rq_size);
 
 	pblk_setup_e_rq(pblk, rqd, ppa);
-- 
2.7.4