[PATCH] I2C: refactor message in i2c_detach_client

We could refactor the error message 34 different i2c drivers print if
i2c_detach_client() fails in this function itself. Saves quite a few
lines of code. Documentation is updated to reflect that change.

Note that this patch should be applied after Rudolf Marek's w83792d
patches.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 7a7837ae3114..b0bceb2fb8b1 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -449,8 +449,12 @@ int i2c_detach_client(struct i2c_client *client)
         struct i2c_adapter *adapter = client->adapter;
         int res = 0;
         
-        if ((client->flags & I2C_CLIENT_ALLOW_USE) && (client->usage_count > 0))
+        if ((client->flags & I2C_CLIENT_ALLOW_USE)
+         && (client->usage_count > 0)) {
+                dev_warn(&client->dev, "Client [%s] still busy, "
+                         "can't detach\n", client->name);
                 return -EBUSY;
+        }
 
         if (adapter->client_unregister)  {
                 res = adapter->client_unregister(client);