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authorInaky Perez-Gonzalez <inaky@linux.intel.com>2009-05-05 21:05:16 -0700
committerInaky Perez-Gonzalez <inaky@linux.intel.com>2009-05-28 18:02:04 -0700
commit52a8d9630890f2289354d03e8751bf0eba2b3376 (patch)
treeabac1de1d3eab2e1bbbced60cc304ed1337a0a7d /net/wimax
parent052991d7ac7f7b2c0319e6ccd2e8a48a71f2bd58 (diff)
downloadlinux-stericsson-52a8d9630890f2289354d03e8751bf0eba2b3376.tar.gz
wimax: document why wimax_msg_*() operations can be used in any state
Funcion documentation for wimax_msg_alloc() and wimax_msg_send() needs to clarify that they can be used in the very early stages of a wimax_dev lifecycle. Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Diffstat (limited to 'net/wimax')
-rw-r--r--net/wimax/op-msg.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/net/wimax/op-msg.c b/net/wimax/op-msg.c
index 9ad4d893a566..d631a17186bc 100644
--- a/net/wimax/op-msg.c
+++ b/net/wimax/op-msg.c
@@ -108,6 +108,12 @@
* Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
* wimax_msg_send() depends on skb->data being placed at the
* beginning of the user message.
+ *
+ * Unlike other WiMAX stack calls, this call can be used way early,
+ * even before wimax_dev_add() is called, as long as the
+ * wimax_dev->net_dev pointer is set to point to a proper
+ * net_dev. This is so that drivers can use it early in case they need
+ * to send stuff around or communicate with user space.
*/
struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
const char *pipe_name,
@@ -115,7 +121,7 @@ struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
gfp_t gfp_flags)
{
int result;
- struct device *dev = wimax_dev->net_dev->dev.parent;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
size_t msg_size;
void *genl_msg;
struct sk_buff *skb;
@@ -161,7 +167,6 @@ error_genlmsg_put:
error_new:
nlmsg_free(skb);
return ERR_PTR(result);
-
}
EXPORT_SYMBOL_GPL(wimax_msg_alloc);
@@ -256,10 +261,16 @@ EXPORT_SYMBOL_GPL(wimax_msg_len);
* Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
* wimax_msg_send() depends on skb->data being placed at the
* beginning of the user message.
+ *
+ * Unlike other WiMAX stack calls, this call can be used way early,
+ * even before wimax_dev_add() is called, as long as the
+ * wimax_dev->net_dev pointer is set to point to a proper
+ * net_dev. This is so that drivers can use it early in case they need
+ * to send stuff around or communicate with user space.
*/
int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
{
- struct device *dev = wimax_dev->net_dev->dev.parent;
+ struct device *dev = wimax_dev_to_dev(wimax_dev);
void *msg = skb->data;
size_t size = skb->len;
might_sleep();