ath9k: remove the virtual wiphy debugfs interface

It does not make much sense to keep the current virtual wiphy implementation
any longer - it adds significant complexity, has very few users and is still
very experimental. At some point in time, it will be replaced by a proper
implementation in mac80211.

By making the code easier to read and maintain, removing virtual wiphy support
helps with fixing the remaining driver issues and adding further improvements.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/debug.c

@@ -381,41 +381,21 @@ static const struct file_operations fops_interrupt = {
 	.llseek = default_llseek,
 };
 
-static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
-{
-	switch (state) {
-	case ATH_WIPHY_INACTIVE:
-		return "INACTIVE";
-	case ATH_WIPHY_ACTIVE:
-		return "ACTIVE";
-	case ATH_WIPHY_PAUSING:
-		return "PAUSING";
-	case ATH_WIPHY_PAUSED:
-		return "PAUSED";
-	case ATH_WIPHY_SCAN:
-		return "SCAN";
-	}
-	return "?";
-}
-
 static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
 			       size_t count, loff_t *ppos)
 {
 	struct ath_softc *sc = file->private_data;
-	struct ath_wiphy *aphy = sc->pri_wiphy;
-	struct ieee80211_channel *chan = aphy->hw->conf.channel;
+	struct ieee80211_channel *chan = sc->hw->conf.channel;
 	char buf[512];
 	unsigned int len = 0;
-	int i;
 	u8 addr[ETH_ALEN];
 	u32 tmp;
 
 	len += snprintf(buf + len, sizeof(buf) - len,
-			"primary: %s (%s chan=%d ht=%d)\n",
-			wiphy_name(sc->pri_wiphy->hw->wiphy),
-			ath_wiphy_state_str(sc->pri_wiphy->state),
+			"%s (chan=%d ht=%d)\n",
+			wiphy_name(sc->hw->wiphy),
 			ieee80211_frequency_to_channel(chan->center_freq),
-			aphy->chan_is_ht);
+			conf_is_ht(&sc->hw->conf));
 
 	put_unaligned_le32(REG_READ_D(sc->sc_ah, AR_STA_ID0), addr);
 	put_unaligned_le16(REG_READ_D(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
@@ -457,123 +437,14 @@ static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
 	else
 		len += snprintf(buf + len, sizeof(buf) - len, "\n");
 
-	/* Put variable-length stuff down here, and check for overflows. */
-	for (i = 0; i < sc->num_sec_wiphy; i++) {
-		struct ath_wiphy *aphy_tmp = sc->sec_wiphy[i];
-		if (aphy_tmp == NULL)
-			continue;
-		chan = aphy_tmp->hw->conf.channel;
-		len += snprintf(buf + len, sizeof(buf) - len,
-			"secondary: %s (%s chan=%d ht=%d)\n",
-			wiphy_name(aphy_tmp->hw->wiphy),
-			ath_wiphy_state_str(aphy_tmp->state),
-			ieee80211_frequency_to_channel(chan->center_freq),
-						       aphy_tmp->chan_is_ht);
-	}
 	if (len > sizeof(buf))
 		len = sizeof(buf);
 
 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
 
-static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
-{
-	int i;
-	if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
-		return sc->pri_wiphy;
-	for (i = 0; i < sc->num_sec_wiphy; i++) {
-		struct ath_wiphy *aphy = sc->sec_wiphy[i];
-		if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
-			return aphy;
-	}
-	return NULL;
-}
-
-static int del_wiphy(struct ath_softc *sc, const char *name)
-{
-	struct ath_wiphy *aphy = get_wiphy(sc, name);
-	if (!aphy)
-		return -ENOENT;
-	return ath9k_wiphy_del(aphy);
-}
-
-static int pause_wiphy(struct ath_softc *sc, const char *name)
-{
-	struct ath_wiphy *aphy = get_wiphy(sc, name);
-	if (!aphy)
-		return -ENOENT;
-	return ath9k_wiphy_pause(aphy);
-}
-
-static int unpause_wiphy(struct ath_softc *sc, const char *name)
-{
-	struct ath_wiphy *aphy = get_wiphy(sc, name);
-	if (!aphy)
-		return -ENOENT;
-	return ath9k_wiphy_unpause(aphy);
-}
-
-static int select_wiphy(struct ath_softc *sc, const char *name)
-{
-	struct ath_wiphy *aphy = get_wiphy(sc, name);
-	if (!aphy)
-		return -ENOENT;
-	return ath9k_wiphy_select(aphy);
-}
-
-static int schedule_wiphy(struct ath_softc *sc, const char *msec)
-{
-	ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
-	return 0;
-}
-
-static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
-				size_t count, loff_t *ppos)
-{
-	struct ath_softc *sc = file->private_data;
-	char buf[50];
-	size_t len;
-
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-	if (len > 0 && buf[len - 1] == '\n')
-		buf[len - 1] = '\0';
-
-	if (strncmp(buf, "add", 3) == 0) {
-		int res = ath9k_wiphy_add(sc);
-		if (res < 0)
-			return res;
-	} else if (strncmp(buf, "del=", 4) == 0) {
-		int res = del_wiphy(sc, buf + 4);
-		if (res < 0)
-			return res;
-	} else if (strncmp(buf, "pause=", 6) == 0) {
-		int res = pause_wiphy(sc, buf + 6);
-		if (res < 0)
-			return res;
-	} else if (strncmp(buf, "unpause=", 8) == 0) {
-		int res = unpause_wiphy(sc, buf + 8);
-		if (res < 0)
-			return res;
-	} else if (strncmp(buf, "select=", 7) == 0) {
-		int res = select_wiphy(sc, buf + 7);
-		if (res < 0)
-			return res;
-	} else if (strncmp(buf, "schedule=", 9) == 0) {
-		int res = schedule_wiphy(sc, buf + 9);
-		if (res < 0)
-			return res;
-	} else
-		return -EOPNOTSUPP;
-
-	return count;
-}
-
 static const struct file_operations fops_wiphy = {
 	.read = read_file_wiphy,
-	.write = write_file_wiphy,
 	.open = ath9k_debugfs_open,
 	.owner = THIS_MODULE,
 	.llseek = default_llseek,