diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2016-09-16 14:25:09 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-09-21 07:57:32 -0600 |
| commit | 1e3aeae4ea710023dda2a6b780183ee371d1a796 (patch) | |
| tree | fef9caecf2ae190102f2c2c9a5b8e49d111d3a8f | |
| parent | 40267efddc296190d50c61d96daf277151447cf6 (diff) | |
lightnvm: propagate device_add() error code
device_add() may fail, and all callers are supposed to check the
return value, but one new user in lightnvm doesn't:
drivers/lightnvm/sysfs.c: In function 'nvm_sysfs_register_dev':
drivers/lightnvm/sysfs.c:184:2: error: ignoring return value of 'device_add',
declared with attribute warn_unused_result [-Werror=unused-result]
This changes the caller to propagate any error codes, which avoids
the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 38c9e260b9f9 ("lightnvm: expose device geometry through sysfs")
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/lightnvm/lightnvm.h | 2 | ||||
| -rw-r--r-- | drivers/lightnvm/sysfs.c | 9 |
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/lightnvm/lightnvm.h b/drivers/lightnvm/lightnvm.h index 93f1aacc9f02..305c181509a6 100644 --- a/drivers/lightnvm/lightnvm.h +++ b/drivers/lightnvm/lightnvm.h @@ -24,7 +24,7 @@ #include <linux/lightnvm.h> /* core -> sysfs.c */ -int nvm_sysfs_register_dev(struct nvm_dev *); +int __must_check nvm_sysfs_register_dev(struct nvm_dev *); void nvm_sysfs_unregister_dev(struct nvm_dev *); int nvm_sysfs_register(void); void nvm_sysfs_unregister(void); diff --git a/drivers/lightnvm/sysfs.c b/drivers/lightnvm/sysfs.c index 72ad089c0269..0338c27ab95a 100644 --- a/drivers/lightnvm/sysfs.c +++ b/drivers/lightnvm/sysfs.c @@ -174,6 +174,8 @@ static struct device_type nvm_type = { int nvm_sysfs_register_dev(struct nvm_dev *dev) { + int ret; + if (!dev->parent_dev) return 0; @@ -181,11 +183,12 @@ int nvm_sysfs_register_dev(struct nvm_dev *dev) dev_set_name(&dev->dev, "%s", dev->name); dev->dev.type = &nvm_type; device_initialize(&dev->dev); - device_add(&dev->dev); + ret = device_add(&dev->dev); - blk_mq_register_dev(&dev->dev, dev->q); + if (!ret) + blk_mq_register_dev(&dev->dev, dev->q); - return 0; + return ret; } void nvm_sysfs_unregister_dev(struct nvm_dev *dev) |