From 6b7e631b927ca1266b2695307ab71ed7764af75e Mon Sep 17 00:00:00 2001
From: Minwoo Im <minwoo.im.dev@gmail.com>
Date: Sun, 7 Apr 2019 15:28:06 +0900
Subject: [PATCH] nvmet: return a specified error it subsys_alloc fails
nvmet_subsys_alloc() returns its pointer or NULL if it fails. We can
see three different steps in this function:
1. memory allocation
2. argument check
3. memory allocation for string
But now the callers of this function do not seem to handle case 2 by
returning -ENOMEM only even if it fails with an invalid parameter.
This patch specifies error codes so that caller can pass it to its own
caller.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/nvme/target/configfs.c | 4 ++--
drivers/nvme/target/core.c | 6 +++---
drivers/nvme/target/discovery.c | 4 ++--
3 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index adb79545cdd79..08dd5af357f7c 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -898,8 +898,8 @@ static struct config_group *nvmet_subsys_make(struct config_group *group,
}
subsys = nvmet_subsys_alloc(name, NVME_NQN_NVME);
- if (!subsys)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(subsys))
+ return ERR_CAST(subsys);
config_group_init_type_name(&subsys->group, name, &nvmet_subsys_type);
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 1c1776c3e316b..24e0a36392d98 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -1367,7 +1367,7 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);
if (!subsys)
- return NULL;
+ return ERR_PTR(-ENOMEM);
subsys->ver = NVME_VS(1, 3, 0); /* NVMe 1.3.0 */
/* generate a random serial number as our controllers are ephemeral: */
@@ -1383,14 +1383,14 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
default:
pr_err("%s: Unknown Subsystem type - %d\n", __func__, type);
kfree(subsys);
- return NULL;
+ return ERR_PTR(-EINVAL);
}
subsys->type = type;
subsys->subsysnqn = kstrndup(subsysnqn, NVMF_NQN_SIZE,
GFP_KERNEL);
if (!subsys->subsysnqn) {
kfree(subsys);
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
kref_init(&subsys->ref);
diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index 33ed95e72d6b1..e8e09266bfa5f 100644
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -372,8 +372,8 @@ int __init nvmet_init_discovery(void)
{
nvmet_disc_subsys =
nvmet_subsys_alloc(NVME_DISC_SUBSYS_NAME, NVME_NQN_DISC);
- if (!nvmet_disc_subsys)
- return -ENOMEM;
+ if (IS_ERR(nvmet_disc_subsys))
+ return PTR_ERR(nvmet_disc_subsys);
return 0;
}
--
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