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Commit 361c9c8b authored by Johannes Berg's avatar Johannes Berg
Browse files

regulatory: use IS_ERR macro family for freq_reg_info 



Instead of returning an error and filling a pointer
return the pointer and an ERR_PTR value in error cases.

Acked-by: default avatarLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c492db37

drivers/net/wireless/ath/regd.c

+6 −10
Original line number Diff line number Diff line
@@ -195,7 +195,6 @@ ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 
	const struct ieee80211_reg_rule *reg_rule;

	struct ieee80211_channel *ch;

	unsigned int i;

	int r;



	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
@@ -213,10 +212,8 @@ ath_reg_apply_beaconing_flags(struct wiphy *wiphy, 
				continue;



			if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {

				r = freq_reg_info(wiphy,

						  ch->center_freq,

						  &reg_rule);

				if (r)

				reg_rule = freq_reg_info(wiphy, ch->center_freq);

				if (IS_ERR(reg_rule))

					continue;

				/*

				 * If 11d had a rule for this channel ensure
@@ -252,7 +249,6 @@ ath_reg_apply_active_scan_flags(struct wiphy *wiphy, 
	struct ieee80211_supported_band *sband;

	struct ieee80211_channel *ch;

	const struct ieee80211_reg_rule *reg_rule;

	int r;



	sband = wiphy->bands[IEEE80211_BAND_2GHZ];

	if (!sband)
@@ -280,16 +276,16 @@ ath_reg_apply_active_scan_flags(struct wiphy *wiphy, 
	 */



	ch = &sband->channels[11]; /* CH 12 */

	r = freq_reg_info(wiphy, ch->center_freq, &reg_rule);

	if (!r) {

	reg_rule = freq_reg_info(wiphy, ch->center_freq);

	if (!IS_ERR(reg_rule)) {

		if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))

			if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)

				ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;

	}



	ch = &sband->channels[12]; /* CH 13 */

	r = freq_reg_info(wiphy, ch->center_freq, &reg_rule);

	if (!r) {

	reg_rule = freq_reg_info(wiphy, ch->center_freq);

	if (!IS_ERR(reg_rule)) {

		if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))

			if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)

				ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;

drivers/net/wireless/brcm80211/brcmsmac/channel.c

+3 −4
Original line number Diff line number Diff line
@@ -670,7 +670,7 @@ brcms_reg_apply_beaconing_flags(struct wiphy *wiphy, 
	struct ieee80211_supported_band *sband;

	struct ieee80211_channel *ch;

	const struct ieee80211_reg_rule *rule;

	int band, i, ret;

	int band, i;



	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

		sband = wiphy->bands[band];
@@ -685,9 +685,8 @@ brcms_reg_apply_beaconing_flags(struct wiphy *wiphy, 
				continue;



			if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {

				ret = freq_reg_info(wiphy, ch->center_freq,

						    &rule);

				if (ret)

				rule = freq_reg_info(wiphy, ch->center_freq);

				if (IS_ERR(rule))

					continue;



				if (!(rule->flags & NL80211_RRF_NO_IBSS))

drivers/net/wireless/rtlwifi/regd.c

+6 −8
Original line number Diff line number Diff line
@@ -158,7 +158,6 @@ static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy, 
	const struct ieee80211_reg_rule *reg_rule;

	struct ieee80211_channel *ch;

	unsigned int i;

	int r;



	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
@@ -173,8 +172,8 @@ static void _rtl_reg_apply_beaconing_flags(struct wiphy *wiphy, 
			    (ch->flags & IEEE80211_CHAN_RADAR))

				continue;

			if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {

				r = freq_reg_info(wiphy, ch->center_freq, &reg_rule);

				if (r)

				reg_rule = freq_reg_info(wiphy, ch->center_freq);

				if (IS_ERR(reg_rule))

					continue;



				/*
@@ -209,7 +208,6 @@ static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy, 
	struct ieee80211_supported_band *sband;

	struct ieee80211_channel *ch;

	const struct ieee80211_reg_rule *reg_rule;

	int r;



	if (!wiphy->bands[IEEE80211_BAND_2GHZ])

		return;
@@ -237,16 +235,16 @@ static void _rtl_reg_apply_active_scan_flags(struct wiphy *wiphy, 
	 */



	ch = &sband->channels[11];	/* CH 12 */

	r = freq_reg_info(wiphy, ch->center_freq, &reg_rule);

	if (!r) {

	reg_rule = freq_reg_info(wiphy, ch->center_freq);

	if (!IS_ERR(reg_rule)) {

		if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))

			if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)

				ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;

	}



	ch = &sband->channels[12];	/* CH 13 */

	r = freq_reg_info(wiphy, ch->center_freq, &reg_rule);

	if (!r) {

	reg_rule = freq_reg_info(wiphy, ch->center_freq);

	if (!IS_ERR(reg_rule)) {

		if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))

			if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)

				ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;

include/net/cfg80211.h

+9 −9
Original line number Diff line number Diff line
@@ -2938,22 +2938,22 @@ extern void wiphy_apply_custom_regulatory( 
 * freq_reg_info - get regulatory information for the given frequency

 * @wiphy: the wiphy for which we want to process this rule for

 * @center_freq: Frequency in KHz for which we want regulatory information for

 * @reg_rule: the regulatory rule which we have for this frequency

 *

 * Use this function to get the regulatory rule for a specific frequency on

 * a given wireless device. If the device has a specific regulatory domain

 * it wants to follow we respect that unless a country IE has been received

 * and processed already.

 *

 * Returns 0 if it was able to find a valid regulatory rule which does

 * apply to the given center_freq otherwise it returns non-zero. It will

 * also return -ERANGE if we determine the given center_freq does not even have

 * a regulatory rule for a frequency range in the center_freq's band. See

 * freq_in_rule_band() for our current definition of a band -- this is purely

 * subjective and right now its 802.11 specific.

 * When an error occurs, for example if no rule can be found, the return value

 * is encoded using ERR_PTR(). Use IS_ERR() to check and PTR_ERR() to obtain

 * the numeric return value. The numeric return value will be -ERANGE if we

 * determine the given center_freq does not even have a regulatory rule for a

 * frequency range in the center_freq's band. See freq_in_rule_band() for our

 * current definition of a band -- this is purely subjective and right now it's

 * 802.11 specific.

 */

extern int freq_reg_info(struct wiphy *wiphy, u32 center_freq,

			 const struct ieee80211_reg_rule **reg_rule);

const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,

					       u32 center_freq);



/*

 * callbacks for asynchronous cfg80211 methods, notification

net/wireless/reg.c

+17 −21
Original line number Diff line number Diff line
@@ -710,8 +710,8 @@ static u32 map_regdom_flags(u32 rd_flags) 
	return channel_flags;

}



static int freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,

			      const struct ieee80211_reg_rule **reg_rule,

static const struct ieee80211_reg_rule *

freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,

		   const struct ieee80211_regdomain *regd)

{

	int i;
@@ -719,7 +719,7 @@ static int freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 
	bool bw_fits = false;



	if (!regd)

		return -EINVAL;

		return ERR_PTR(-EINVAL);



	for (i = 0; i < regd->n_reg_rules; i++) {

		const struct ieee80211_reg_rule *rr;
@@ -738,20 +738,18 @@ static int freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 


		bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20));



		if (band_rule_found && bw_fits) {

			*reg_rule = rr;

			return 0;

		}

		if (band_rule_found && bw_fits)

			return rr;

	}



	if (!band_rule_found)

		return -ERANGE;

		return ERR_PTR(-ERANGE);



	return -EINVAL;

	return ERR_PTR(-EINVAL);

}



int freq_reg_info(struct wiphy *wiphy, u32 center_freq,

		  const struct ieee80211_reg_rule **reg_rule)

const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,

					       u32 center_freq)

{

	const struct ieee80211_regdomain *regd;

	struct regulatory_request *lr = get_last_request();
@@ -767,7 +765,7 @@ int freq_reg_info(struct wiphy *wiphy, u32 center_freq, 
	else

		regd = get_cfg80211_regdom();



	return freq_reg_info_regd(wiphy, center_freq, reg_rule, regd);

	return freq_reg_info_regd(wiphy, center_freq, regd);

}

EXPORT_SYMBOL(freq_reg_info);
@@ -829,7 +827,6 @@ static void handle_channel(struct wiphy *wiphy, 
			   enum nl80211_reg_initiator initiator,

			   struct ieee80211_channel *chan)

{

	int r;

	u32 flags, bw_flags = 0;

	const struct ieee80211_reg_rule *reg_rule = NULL;

	const struct ieee80211_power_rule *power_rule = NULL;
@@ -841,8 +838,8 @@ static void handle_channel(struct wiphy *wiphy, 


	flags = chan->orig_flags;



	r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), &reg_rule);

	if (r) {

	reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));

	if (IS_ERR(reg_rule)) {

		/*

		 * We will disable all channels that do not match our

		 * received regulatory rule unless the hint is coming
@@ -854,7 +851,7 @@ static void handle_channel(struct wiphy *wiphy, 
		 * while 5 GHz is still supported.

		 */

		if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&

		    r == -ERANGE)

		    PTR_ERR(reg_rule) == -ERANGE)

			return;



		REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq);
@@ -1239,16 +1236,15 @@ static void handle_channel_custom(struct wiphy *wiphy, 
				  struct ieee80211_channel *chan,

				  const struct ieee80211_regdomain *regd)

{

	int r;

	u32 bw_flags = 0;

	const struct ieee80211_reg_rule *reg_rule = NULL;

	const struct ieee80211_power_rule *power_rule = NULL;

	const struct ieee80211_freq_range *freq_range = NULL;



	r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),

			       &reg_rule, regd);

	reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),

				      regd);



	if (r) {

	if (IS_ERR(reg_rule)) {

		REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",

			      chan->center_freq);

		chan->flags = IEEE80211_CHAN_DISABLED;