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libertas: make a handy lbs_cmd_async() command 

This uses a static lbs_cmd_async_callback function, which is a
noop. Just setting the callback argument to __lbs_cmd_async()
to NULL won't work, because then the cmdnode wouldn't be
released.

This also makes __lbs_cmd_async() a static method, which is
now only used by lbs_cmd() and lbs_cmd_async().

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Holger Schurig 2008-03-19 10:11:00 +01:00 committed by John W. Linville
parent 712b6cf57a
commit 8db4a2b986
2 changed files with 57 additions and 36 deletions
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84
drivers/net/wireless/libertas/cmd.c
View File

@ -19,6 +19,46 @@ static void lbs_set_cmd_ctrl_node(struct lbs_private *priv,
void *pdata_buf);
/**
* @brief Simple callback that copies response back into command
*
* @param priv A pointer to struct lbs_private structure
* @param extra A pointer to the original command structure for which
* 'resp' is a response
* @param resp A pointer to the command response
*
* @return 0 on success, error on failure
*/
int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
struct cmd_header *resp)
{
struct cmd_header *buf = (void *)extra;
uint16_t copy_len;
copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
memcpy(buf, resp, copy_len);
return 0;
}
EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
/**
* @brief Simple callback that ignores the result. Use this if
* you just want to send a command to the hardware, but don't
* care for the result.
*
* @param priv ignored
* @param extra ignored
* @param resp ignored
*
* @return 0 for success
*/
static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
struct cmd_header *resp)
{
return 0;
}
/**
* @brief Checks whether a command is allowed in Power Save mode
*
@ -1242,7 +1282,7 @@ void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
cmd->cmdwaitqwoken = 1;
wake_up_interruptible(&cmd->cmdwait_q);
if (!cmd->callback)
if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
__lbs_cleanup_and_insert_cmd(priv, cmd);
priv->cur_cmd = NULL;
}
@ -2018,32 +2058,10 @@ void lbs_ps_confirm_sleep(struct lbs_private *priv, u16 psmode)
}
/**
* @brief Simple callback that copies response back into command
*
* @param priv A pointer to struct lbs_private structure
* @param extra A pointer to the original command structure for which
* 'resp' is a response
* @param resp A pointer to the command response
*
* @return 0 on success, error on failure
*/
int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
struct cmd_header *resp)
{
struct cmd_header *buf = (void *)extra;
uint16_t copy_len;
copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
memcpy(buf, resp, copy_len);
return 0;
}
EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
unsigned long callback_arg)
static struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
unsigned long callback_arg)
{
struct cmd_ctrl_node *cmdnode;
@ -2080,9 +2098,6 @@ struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command
lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
/* here was the big old switch() statement, which is now obsolete,
* because the caller of lbs_cmd() sets up all of *cmd for us. */
cmdnode->cmdwaitqwoken = 0;
lbs_queue_cmd(priv, cmdnode);
wake_up_interruptible(&priv->waitq);
@ -2092,6 +2107,15 @@ struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command
return cmdnode;
}
void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size)
{
lbs_deb_enter(LBS_DEB_CMD);
__lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
lbs_cmd_async_callback, 0);
lbs_deb_leave(LBS_DEB_CMD);
}
int __lbs_cmd(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),

9
drivers/net/wireless/libertas/cmd.h
View File

@ -18,12 +18,9 @@
#define lbs_cmd_with_response(priv, cmdnr, cmd) \
lbs_cmd(priv, cmdnr, cmd, lbs_cmd_copyback, (unsigned long) (cmd))
/* __lbs_cmd() will free the cmdnode and return success/failure.
__lbs_cmd_async() requires that the callback free the cmdnode */
struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
unsigned long callback_arg);
void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size);
int __lbs_cmd(struct lbs_private *priv, uint16_t command,
struct cmd_header *in_cmd, int in_cmd_size,
int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),