mac80211: add vht cap decode to debugfs

static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,

				 size_t count, loff_t *ppos)

{

	char buf[128], *p = buf;

	char buf[512], *p = buf;

	struct sta_info *sta = file->private_data;

	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;

	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",

			vhtc->vht_supported ? "" : "not ");

	if (vhtc->vht_supported) {

		p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);

		p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",

			       vhtc->cap);

#define PFLAG(a, b)							\

		do {							\

			if (vhtc->cap & IEEE80211_VHT_CAP_ ## a)	\

				p += scnprintf(p, sizeof(buf) + buf - p, \

					       "\t\t%s\n", b);		\

		} while (0)

		switch (vhtc->cap & 0x3) {

		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\tMAX-MPDU-3895\n");

			break;

		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\tMAX-MPDU-7991\n");

			break;

		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\tMAX-MPDU-11454\n");

			break;

		default:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\tMAX-MPDU-UNKNOWN\n");

		};

		switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {

		case 0:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\t80Mhz\n");

			break;

		case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\t160Mhz\n");

			break;

		case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\t80+80Mhz\n");

			break;

		default:

			p += scnprintf(p, sizeof(buf) + buf - p,

				       "\t\tUNKNOWN-MHZ: 0x%x\n",

				       (vhtc->cap >> 2) & 0x3);

		};

		PFLAG(RXLDPC, "RXLDPC");

		PFLAG(SHORT_GI_80, "SHORT-GI-80");

		PFLAG(SHORT_GI_160, "SHORT-GI-160");

		PFLAG(TXSTBC, "TXSTBC");

		p += scnprintf(p, sizeof(buf) + buf - p,

			       "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);

		PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");

		PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");

		p += scnprintf(p, sizeof(buf) + buf - p,

			"\t\tBEAMFORMEE-STS: 0x%x\n",

			(vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>

			IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);

		p += scnprintf(p, sizeof(buf) + buf - p,

			"\t\tSOUNDING-DIMENSIONS: 0x%x\n",

			(vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)

			>> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);

		PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");

		PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");

		PFLAG(VHT_TXOP_PS, "TXOP-PS");

		PFLAG(HTC_VHT, "HTC-VHT");

		p += scnprintf(p, sizeof(buf) + buf - p,

			"\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",

			(vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>

			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);

		PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,

		      "LINK-ADAPTATION-VHT-UNSOL-MFB");

		p += scnprintf(p, sizeof(buf) + buf - p,

			"\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",

			(vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);

		PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");

		PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");

		p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",

			       le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));