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Re: [PATCH v2] libertas: Use lbs_is_cmd_allowed() check in command handling routines.

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On Tue, 2009-10-06 at 19:20 -0700, Bing Zhao wrote:
> From: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
> 
> lbs_is_cmd_allowed() check is added in __lbs_cmd_async() and
> lbs_prepare_and_send_command(). The check is removed from other places.
> 
> Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
> Signed-off-by: Bing Zhao <bzhao@xxxxxxxxxxx>

Acked-by: Dan Williams <dcbw@xxxxxxxxxx>

> ---
>  drivers/net/wireless/libertas/cmd.c     |   34 ++++++++
>  drivers/net/wireless/libertas/debugfs.c |   46 -----------
>  drivers/net/wireless/libertas/decl.h    |    1 -
>  drivers/net/wireless/libertas/scan.c    |   11 ---
>  drivers/net/wireless/libertas/wext.c    |  133 -------------------------------
>  5 files changed, 34 insertions(+), 191 deletions(-)
> 
> diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
> index 3a3e894..0fb3125 100644
> --- a/drivers/net/wireless/libertas/cmd.c
> +++ b/drivers/net/wireless/libertas/cmd.c
> @@ -75,6 +75,30 @@ static u8 is_command_allowed_in_ps(u16 cmd)
>  }
>  
>  /**
> + *  @brief This function checks if the command is allowed.
> + *
> + *  @param priv         A pointer to lbs_private structure
> + *  @return             allowed or not allowed.
> + */
> +
> +static int lbs_is_cmd_allowed(struct lbs_private *priv)
> +{
> +	int ret = 1;
> +
> +	lbs_deb_enter(LBS_DEB_CMD);
> +
> +	if (!priv->is_auto_deep_sleep_enabled) {
> +		if (priv->is_deep_sleep) {
> +			lbs_deb_cmd("command not allowed in deep sleep\n");
> +			ret = 0;
> +		}
> +	}
> +
> +	lbs_deb_leave(LBS_DEB_CMD);
> +	return ret;
> +}
> +
> +/**
>   *  @brief Updates the hardware details like MAC address and regulatory region
>   *
>   *  @param priv    	A pointer to struct lbs_private structure
> @@ -1452,6 +1476,11 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
>  		goto done;
>  	}
>  
> +	if (!lbs_is_cmd_allowed(priv)) {
> +		ret = -EBUSY;
> +		goto done;
> +	}
> +
>  	cmdnode = lbs_get_cmd_ctrl_node(priv);
>  
>  	if (cmdnode == NULL) {
> @@ -2104,6 +2133,11 @@ static struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
>  		goto done;
>  	}
>  
> +	if (!lbs_is_cmd_allowed(priv)) {
> +		cmdnode = ERR_PTR(-EBUSY);
> +		goto done;
> +	}
> +
>  	cmdnode = lbs_get_cmd_ctrl_node(priv);
>  	if (cmdnode == NULL) {
>  		lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
> diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
> index 8a7e931..893a55c 100644
> --- a/drivers/net/wireless/libertas/debugfs.c
> +++ b/drivers/net/wireless/libertas/debugfs.c
> @@ -117,11 +117,6 @@ static ssize_t lbs_sleepparams_write(struct file *file,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out_unlock;
> -	}
> -
>  	buf_size = min(count, len - 1);
>  	if (copy_from_user(buf, user_buf, buf_size)) {
>  		ret = -EFAULT;
> @@ -162,11 +157,6 @@ static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out_unlock;
> -	}
> -
>  	ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp);
>  	if (ret)
>  		goto out_unlock;
> @@ -233,9 +223,6 @@ static ssize_t lbs_threshold_read(uint16_t tlv_type, uint16_t event_mask,
>  	u8 freq;
>  	int events = 0;
>  
> -	if (!lbs_is_cmd_allowed(priv))
> -		return -EBUSY;
> -
>  	buf = (char *)get_zeroed_page(GFP_KERNEL);
>  	if (!buf)
>  		return -ENOMEM;
> @@ -288,9 +275,6 @@ static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask,
>  	char *buf;
>  	int ret;
>  
> -	if (!lbs_is_cmd_allowed(priv))
> -		return -EBUSY;
> -
>  	buf = (char *)get_zeroed_page(GFP_KERNEL);
>  	if (!buf)
>  		return -ENOMEM;
> @@ -460,11 +444,6 @@ static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		free_page(addr);
> -		return -EBUSY;
> -	}
> -
>  	offval.offset = priv->mac_offset;
>  	offval.value = 0;
>  
> @@ -517,11 +496,6 @@ static ssize_t lbs_wrmac_write(struct file *file,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		res = -EBUSY;
> -		goto out_unlock;
> -	}
> -
>  	buf_size = min(count, len - 1);
>  	if (copy_from_user(buf, userbuf, buf_size)) {
>  		res = -EFAULT;
> @@ -558,11 +532,6 @@ static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		free_page(addr);
> -		return -EBUSY;
> -	}
> -
>  	offval.offset = priv->bbp_offset;
>  	offval.value = 0;
>  
> @@ -616,11 +585,6 @@ static ssize_t lbs_wrbbp_write(struct file *file,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		res = -EBUSY;
> -		goto out_unlock;
> -	}
> -
>  	buf_size = min(count, len - 1);
>  	if (copy_from_user(buf, userbuf, buf_size)) {
>  		res = -EFAULT;
> @@ -657,11 +621,6 @@ static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		free_page(addr);
> -		return -EBUSY;
> -	}
> -
>  	offval.offset = priv->rf_offset;
>  	offval.value = 0;
>  
> @@ -715,11 +674,6 @@ static ssize_t lbs_wrrf_write(struct file *file,
>  	if (!buf)
>  		return -ENOMEM;
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		res = -EBUSY;
> -		goto out_unlock;
> -	}
> -
>  	buf_size = min(count, len - 1);
>  	if (copy_from_user(buf, userbuf, buf_size)) {
>  		res = -EFAULT;
> diff --git a/drivers/net/wireless/libertas/decl.h b/drivers/net/wireless/libertas/decl.h
> index 44f0b24..fb91c36 100644
> --- a/drivers/net/wireless/libertas/decl.h
> +++ b/drivers/net/wireless/libertas/decl.h
> @@ -34,7 +34,6 @@ int lbs_process_event(struct lbs_private *priv, u32 event);
>  void lbs_queue_event(struct lbs_private *priv, u32 event);
>  void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx);
>  int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep);
> -int lbs_is_cmd_allowed(struct lbs_private *priv);
>  int lbs_enter_auto_deep_sleep(struct lbs_private *priv);
>  int lbs_exit_auto_deep_sleep(struct lbs_private *priv);
>  
> diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
> index e468e15..6c95af3 100644
> --- a/drivers/net/wireless/libertas/scan.c
> +++ b/drivers/net/wireless/libertas/scan.c
> @@ -950,11 +950,6 @@ int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	if (!priv->radio_on) {
>  		ret = -EINVAL;
>  		goto out;
> @@ -1022,12 +1017,6 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		err = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", err);
> -		return err;
> -	}
> -
>  	/* iwlist should wait until the current scan is finished */
>  	if (priv->scan_channel)
>  		return -EAGAIN;
> diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
> index 38a451e..69dd19b 100644
> --- a/drivers/net/wireless/libertas/wext.c
> +++ b/drivers/net/wireless/libertas/wext.c
> @@ -46,32 +46,6 @@ static inline void lbs_cancel_association_work(struct lbs_private *priv)
>  }
>  
>  /**
> - *  @brief This function checks if the command is allowed.
> - *
> - *  @param priv         A pointer to lbs_private structure
> - *  @return             allowed or not allowed.
> - */
> -
> -int lbs_is_cmd_allowed(struct lbs_private *priv)
> -{
> -	int         ret = 1;
> -
> -	lbs_deb_enter(LBS_DEB_WEXT);
> -
> -	if (!priv->is_auto_deep_sleep_enabled) {
> -		if (priv->is_deep_sleep) {
> -			lbs_deb_wext("IOCTLS called when station"
> -					"is in deep sleep\n");
> -			ret = 0;
> -		}
> -	}
> -
> -	lbs_deb_leave(LBS_DEB_WEXT);
> -	return ret;
> -}
> -
> -
> -/**
>   *  @brief Find the channel frequency power info with specific channel
>   *
>   *  @param priv 	A pointer to struct lbs_private structure
> @@ -193,11 +167,6 @@ static int lbs_get_freq(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		lbs_deb_leave(LBS_DEB_WEXT);
> -		return -EBUSY;
> -	}
> -
>  	cfp = lbs_find_cfp_by_band_and_channel(priv, 0,
>  					   priv->curbssparams.channel);
>  
> @@ -308,12 +277,6 @@ static int lbs_set_rts(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	if (vwrq->disabled)
>  		val = MRVDRV_RTS_MAX_VALUE;
>  
> @@ -335,11 +298,6 @@ static int lbs_get_rts(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	ret = lbs_get_snmp_mib(priv, SNMP_MIB_OID_RTS_THRESHOLD, &val);
>  	if (ret)
>  		goto out;
> @@ -362,12 +320,6 @@ static int lbs_set_frag(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	if (vwrq->disabled)
>  		val = MRVDRV_FRAG_MAX_VALUE;
>  
> @@ -389,11 +341,6 @@ static int lbs_get_frag(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	ret = lbs_get_snmp_mib(priv, SNMP_MIB_OID_FRAG_THRESHOLD, &val);
>  	if (ret)
>  		goto out;
> @@ -443,11 +390,6 @@ static int lbs_get_txpow(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	if (!priv->radio_on) {
>  		lbs_deb_wext("tx power off\n");
>  		vwrq->value = 0;
> @@ -481,11 +423,6 @@ static int lbs_set_retry(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>          if ((vwrq->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
>                  return -EOPNOTSUPP;
>  
> @@ -534,11 +471,6 @@ static int lbs_get_retry(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	vwrq->disabled = 0;
>  
>  	if (vwrq->flags & IW_RETRY_LONG) {
> @@ -907,9 +839,6 @@ static struct iw_statistics *lbs_get_wireless_stats(struct net_device *dev)
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv))
> -		return NULL;
> -
>  	priv->wstats.status = priv->mode;
>  
>  	/* If we're not associated, all quality values are meaningless */
> @@ -1010,12 +939,6 @@ static int lbs_set_freq(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	mutex_lock(&priv->lock);
>  	assoc_req = lbs_get_association_request(priv);
>  	if (!assoc_req) {
> @@ -1125,11 +1048,6 @@ static int lbs_set_rate(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	lbs_deb_wext("vwrq->value %d\n", vwrq->value);
>  	lbs_deb_wext("vwrq->fixed %d\n", vwrq->fixed);
>  
> @@ -1188,11 +1106,6 @@ static int lbs_get_rate(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		lbs_deb_leave(LBS_DEB_WEXT);
> -		return -EBUSY;
> -	}
> -
>  	if (priv->connect_status == LBS_CONNECTED) {
>  		vwrq->value = priv->cur_rate * 500000;
>  
> @@ -1219,11 +1132,6 @@ static int lbs_set_mode(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	if (   (*uwrq != IW_MODE_ADHOC)
>  	    && (*uwrq != IW_MODE_INFRA)
>  	    && (*uwrq != IW_MODE_AUTO)) {
> @@ -1465,12 +1373,6 @@ static int lbs_set_encode(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	mutex_lock(&priv->lock);
>  	assoc_req = lbs_get_association_request(priv);
>  	if (!assoc_req) {
> @@ -1654,12 +1556,6 @@ static int lbs_set_encodeext(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	mutex_lock(&priv->lock);
>  	assoc_req = lbs_get_association_request(priv);
>  	if (!assoc_req) {
> @@ -1872,12 +1768,6 @@ static int lbs_set_auth(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	mutex_lock(&priv->lock);
>  	assoc_req = lbs_get_association_request(priv);
>  	if (!assoc_req) {
> @@ -1980,12 +1870,6 @@ static int lbs_get_auth(struct net_device *dev,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	switch (dwrq->flags & IW_AUTH_INDEX) {
>  	case IW_AUTH_KEY_MGMT:
>  		dwrq->value = priv->secinfo.key_mgmt;
> @@ -2028,11 +1912,6 @@ static int lbs_set_txpow(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		goto out;
> -	}
> -
>  	if (vwrq->disabled) {
>  		lbs_set_radio(priv, RADIO_PREAMBLE_AUTO, 0);
>  		goto out;
> @@ -2152,12 +2031,6 @@ static int lbs_set_essid(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	if (!priv->radio_on) {
>  		ret = -EINVAL;
>  		goto out;
> @@ -2285,12 +2158,6 @@ static int lbs_set_wap(struct net_device *dev, struct iw_request_info *info,
>  
>  	lbs_deb_enter(LBS_DEB_WEXT);
>  
> -	if (!lbs_is_cmd_allowed(priv)) {
> -		ret = -EBUSY;
> -		lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> -		return ret;
> -	}
> -
>  	if (!priv->radio_on)
>  		return -EINVAL;
>  

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