diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2022-08-25 14:38:57 -0700 |
|---|---|---|
| committer | Leon Romanovsky <leonro@nvidia.com> | 2022-08-28 13:02:04 +0300 |
| commit | c8e4c23976554fb9dda1658bd1a3914b202815cd (patch) | |
| tree | f803350df7c4823125c1e7033b56f7e8a50b29d2 | |
| parent | 3d67e7e236adb4965ff9834bb7125686ecf9654a (diff) | |
| download | linux-c8e4c23976554fb9dda1658bd1a3914b202815cd.tar.gz | |
RDMA/srp: Rework the srp_add_port() error path
device_register() always calls device_initialize() so calling device_del() is safe even if device_register() fails. Implement the following advice from the comment block above device_register(): "NOTE: _Never_ directly free @dev after calling this function, even if it returned an error! Always use put_device() to give up the reference initialized in this function instead." Keep the kfree() call in the error path since srp_release_dev() does not free the host. Link: https://lore.kernel.org/r/20220825213900.864587-2-bvanassche@acm.org Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 7720ea270ed8..8fd6a88f7a9c 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -3909,20 +3909,19 @@ static struct srp_host *srp_add_port(struct srp_device *device, u8 port) port); if (device_register(&host->dev)) - goto free_host; + goto put_host; if (device_create_file(&host->dev, &dev_attr_add_target)) - goto err_class; + goto put_host; if (device_create_file(&host->dev, &dev_attr_ibdev)) - goto err_class; + goto put_host; if (device_create_file(&host->dev, &dev_attr_port)) - goto err_class; + goto put_host; return host; -err_class: - device_unregister(&host->dev); - -free_host: +put_host: + device_del(&host->dev); + put_device(&host->dev); kfree(host); return NULL; |