[PATCH rdma-next 4/5] RDMA/core: Implement IB device rename function
From: Leon Romanovsky <leon@kernel.org>
Date: 2018-09-20 17:05:17
Also in:
linux-rdma, linux-s390
Subsystem:
infiniband subsystem, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
From: Leon Romanovsky <redacted> Generic implementation of IB device rename function. Signed-off-by: Leon Romanovsky <redacted> --- drivers/infiniband/core/core_priv.h | 1 + drivers/infiniband/core/device.c | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+)
diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index d7399d5b1cb6..c5881756b799 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h@@ -87,6 +87,7 @@ int ib_device_register_sysfs(struct ib_device *device, int (*port_callback)(struct ib_device *, u8, struct kobject *)); void ib_device_unregister_sysfs(struct ib_device *device); +int ib_device_rename(struct ib_device *ibdev, const char *name); typedef void (*roce_netdev_callback)(struct ib_device *device, u8 port, struct net_device *idev, void *cookie);
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index a9bc2a3f490c..36b79cd6b620 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c@@ -178,6 +178,29 @@ void ib_device_get_name(struct ib_device *ibdev, char *name) } EXPORT_SYMBOL(ib_device_get_name); +int ib_device_rename(struct ib_device *ibdev, const char *name) +{ + struct ib_device *device; + int ret = 0; + + if (!strcmp(name, ibdev->name)) + return ret; + + mutex_lock(&device_mutex); + list_for_each_entry(device, &device_list, core_list) { + if (!strcmp(name, device->name)) { + ret = -EEXIST; + goto out; + } + } + + strlcpy(ibdev->name, name, IB_DEVICE_NAME_MAX); + ret = device_rename(&ibdev->dev, name); +out: + mutex_unlock(&device_mutex); + return ret; +} + static int alloc_name(char *name) { unsigned long *inuse;