Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

15 files changed, 351 insertions, 46 deletions

diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig
index 783a38f1a626..1f3523019509 100644
--- a/drivers/net/wireless/ath/ath9k/Kconfig
+++ b/drivers/net/wireless/ath/ath9k/Kconfig
@@ -61,13 +61,12 @@ config ATH9K_DEBUGFS
 	depends on ATH9K && DEBUG_FS
 	select MAC80211_DEBUGFS
 	select ATH9K_COMMON_DEBUG
-	select RELAY
 	---help---
 	  Say Y, if you need access to ath9k's statistics for
 	  interrupts, rate control, etc.
 
-	  Also required for changing debug message flags at run time.
-	  As well as access to the FFT/spectral data and TX99.
+	  Also required for changing debug message flags at run time and for
+	  TX99.
 
 config ATH9K_STATION_STATISTICS
 	bool "Detailed station statistics"
@@ -177,7 +176,6 @@ config ATH9K_HTC_DEBUGFS
 	bool "Atheros ath9k_htc debugging"
 	depends on ATH9K_HTC && DEBUG_FS
 	select ATH9K_COMMON_DEBUG
-	select RELAY
 	---help---
 	  Say Y, if you need access to ath9k_htc's statistics.
 	  As well as access to the FFT/spectral data.
@@ -192,3 +190,11 @@ config ATH9K_HWRNG
 
 	  Say Y, feeds the entropy directly from the WiFi driver to the input
 	  pool.
+
+config ATH9K_COMMON_SPECTRAL
+	bool "Atheros ath9k/ath9k_htc spectral scan support"
+	depends on ATH9K_DEBUGFS || ATH9K_HTC_DEBUGFS
+	select RELAY
+	default n
+	---help---
+	  Say Y to enable access to the FFT/spectral data via debugfs.
diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile
index d804ce7391a0..f71b2ad8275c 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -62,8 +62,8 @@ ath9k_common-y:=	common.o \
 			common-init.o \
 			common-beacon.o \
 
-ath9k_common-$(CONFIG_ATH9K_COMMON_DEBUG) += common-debug.o \
-					     common-spectral.o
+ath9k_common-$(CONFIG_ATH9K_COMMON_DEBUG) += common-debug.o
+ath9k_common-$(CONFIG_ATH9K_COMMON_SPECTRAL) += common-spectral.o
 
 ath9k_htc-y +=	htc_hst.o \
 		hif_usb.o \
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index c2e210c0a770..f019a20e5a1f 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3310,6 +3310,12 @@ static int ar9300_eeprom_restore_internal(struct ath_hw *ah,
 	if (ar9300_check_eeprom_header(ah, read, cptr))
 		goto found;
 
+	cptr = AR9300_BASE_ADDR_4K;
+	ath_dbg(common, EEPROM, "Trying EEPROM access at Address 0x%04x\n",
+		cptr);
+	if (ar9300_check_eeprom_header(ah, read, cptr))
+		goto found;
+
 	cptr = AR9300_BASE_ADDR_512;
 	ath_dbg(common, EEPROM, "Trying EEPROM access at Address 0x%04x\n",
 		cptr);
@@ -3430,6 +3436,60 @@ static u32 ar9003_dump_modal_eeprom(char *buf, u32 len, u32 size,
 	return len;
 }
 
+static u32 ar9003_dump_cal_data(struct ath_hw *ah, char *buf, u32 len, u32 size,
+				bool is_2g)
+{
+	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+	struct ar9300_base_eep_hdr *pBase;
+	struct ar9300_cal_data_per_freq_op_loop *cal_pier;
+	int cal_pier_nr;
+	int freq;
+	int i, j;
+
+	pBase = &eep->baseEepHeader;
+
+	if (is_2g)
+		cal_pier_nr = AR9300_NUM_2G_CAL_PIERS;
+	else
+		cal_pier_nr = AR9300_NUM_5G_CAL_PIERS;
+
+	for (i = 0; i < AR9300_MAX_CHAINS; i++) {
+		if (!((pBase->txrxMask >> i) & 1))
+			continue;
+
+		len += snprintf(buf + len, size - len, "Chain %d\n", i);
+
+		len += snprintf(buf + len, size - len,
+			"Freq\t ref\tvolt\ttemp\tnf_cal\tnf_pow\trx_temp\n");
+
+		for (j = 0; j < cal_pier_nr; j++) {
+			if (is_2g) {
+				cal_pier = &eep->calPierData2G[i][j];
+				freq = 2300 + eep->calFreqPier2G[j];
+			} else {
+				cal_pier = &eep->calPierData5G[i][j];
+				freq = 4800 + eep->calFreqPier5G[j] * 5;
+			}
+
+			len += snprintf(buf + len, size - len,
+				"%d\t", freq);
+
+			len += snprintf(buf + len, size - len,
+				"%d\t%d\t%d\t%d\t%d\t%d\n",
+				cal_pier->refPower,
+				cal_pier->voltMeas,
+				cal_pier->tempMeas,
+				cal_pier->rxTempMeas ?
+				N2DBM(cal_pier->rxNoisefloorCal) : 0,
+				cal_pier->rxTempMeas ?
+				N2DBM(cal_pier->rxNoisefloorPower) : 0,
+				cal_pier->rxTempMeas);
+		}
+	}
+
+	return len;
+}
+
 static u32 ath9k_hw_ar9003_dump_eeprom(struct ath_hw *ah, bool dump_base_hdr,
 				       u8 *buf, u32 len, u32 size)
 {
@@ -3441,10 +3501,18 @@ static u32 ath9k_hw_ar9003_dump_eeprom(struct ath_hw *ah, bool dump_base_hdr,
 				 "%20s :\n", "2GHz modal Header");
 		len = ar9003_dump_modal_eeprom(buf, len, size,
 						&eep->modalHeader2G);
-		len += scnprintf(buf + len, size - len,
+
+		len += scnprintf(buf + len, size - len, "Calibration data\n");
+		len = ar9003_dump_cal_data(ah, buf, len, size, true);
+
+		len +=  snprintf(buf + len, size - len,
 				 "%20s :\n", "5GHz modal Header");
 		len = ar9003_dump_modal_eeprom(buf, len, size,
 						&eep->modalHeader5G);
+
+		len += snprintf(buf + len, size - len, "Calibration data\n");
+		len = ar9003_dump_cal_data(ah, buf, len, size, false);
+
 		goto out;
 	}
 
@@ -4683,7 +4751,8 @@ static int ar9003_hw_cal_pier_get(struct ath_hw *ah,
 				  int ichain,
 				  int *pfrequency,
 				  int *pcorrection,
-				  int *ptemperature, int *pvoltage)
+				  int *ptemperature, int *pvoltage,
+				  int *pnf_cal, int *pnf_power)
 {
 	u8 *pCalPier;
 	struct ar9300_cal_data_per_freq_op_loop *pCalPierStruct;
@@ -4725,6 +4794,10 @@ static int ar9003_hw_cal_pier_get(struct ath_hw *ah,
 	*pcorrection = pCalPierStruct->refPower;
 	*ptemperature = pCalPierStruct->tempMeas;
 	*pvoltage = pCalPierStruct->voltMeas;
+	*pnf_cal = pCalPierStruct->rxTempMeas ?
+			N2DBM(pCalPierStruct->rxNoisefloorCal) : 0;
+	*pnf_power = pCalPierStruct->rxTempMeas ?
+			N2DBM(pCalPierStruct->rxNoisefloorPower) : 0;
 
 	return 0;
 }
@@ -4889,14 +4962,18 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 	int mode;
 	int lfrequency[AR9300_MAX_CHAINS],
 	    lcorrection[AR9300_MAX_CHAINS],
-	    ltemperature[AR9300_MAX_CHAINS], lvoltage[AR9300_MAX_CHAINS];
+	    ltemperature[AR9300_MAX_CHAINS], lvoltage[AR9300_MAX_CHAINS],
+	    lnf_cal[AR9300_MAX_CHAINS], lnf_pwr[AR9300_MAX_CHAINS];
 	int hfrequency[AR9300_MAX_CHAINS],
 	    hcorrection[AR9300_MAX_CHAINS],
-	    htemperature[AR9300_MAX_CHAINS], hvoltage[AR9300_MAX_CHAINS];
+	    htemperature[AR9300_MAX_CHAINS], hvoltage[AR9300_MAX_CHAINS],
+	    hnf_cal[AR9300_MAX_CHAINS], hnf_pwr[AR9300_MAX_CHAINS];
 	int fdiff;
 	int correction[AR9300_MAX_CHAINS],
-	    voltage[AR9300_MAX_CHAINS], temperature[AR9300_MAX_CHAINS];
-	int pfrequency, pcorrection, ptemperature, pvoltage;
+	    voltage[AR9300_MAX_CHAINS], temperature[AR9300_MAX_CHAINS],
+	    nf_cal[AR9300_MAX_CHAINS], nf_pwr[AR9300_MAX_CHAINS];
+	int pfrequency, pcorrection, ptemperature, pvoltage,
+	    pnf_cal, pnf_pwr;
 	struct ath_common *common = ath9k_hw_common(ah);
 
 	mode = (frequency >= 4000);
@@ -4914,7 +4991,8 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 		for (ipier = 0; ipier < npier; ipier++) {
 			if (!ar9003_hw_cal_pier_get(ah, mode, ipier, ichain,
 						    &pfrequency, &pcorrection,
-						    &ptemperature, &pvoltage)) {
+						    &ptemperature, &pvoltage,
+						    &pnf_cal, &pnf_pwr)) {
 				fdiff = frequency - pfrequency;
 
 				/*
@@ -4936,6 +5014,8 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 						htemperature[ichain] =
 						    ptemperature;
 						hvoltage[ichain] = pvoltage;
+						hnf_cal[ichain] = pnf_cal;
+						hnf_pwr[ichain] = pnf_pwr;
 					}
 				}
 				if (fdiff >= 0) {
@@ -4952,6 +5032,8 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 						ltemperature[ichain] =
 						    ptemperature;
 						lvoltage[ichain] = pvoltage;
+						lnf_cal[ichain] = pnf_cal;
+						lnf_pwr[ichain] = pnf_pwr;
 					}
 				}
 			}
@@ -4960,15 +5042,20 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 
 	/* interpolate  */
 	for (ichain = 0; ichain < AR9300_MAX_CHAINS; ichain++) {
-		ath_dbg(common, EEPROM, "ch=%d f=%d low=%d %d h=%d %d\n",
+		ath_dbg(common, EEPROM,
+			"ch=%d f=%d low=%d %d h=%d %d n=%d %d p=%d %d\n",
 			ichain, frequency, lfrequency[ichain],
 			lcorrection[ichain], hfrequency[ichain],
-			hcorrection[ichain]);
+			hcorrection[ichain], lnf_cal[ichain],
+			hnf_cal[ichain], lnf_pwr[ichain],
+			hnf_pwr[ichain]);
 		/* they're the same, so just pick one */
 		if (hfrequency[ichain] == lfrequency[ichain]) {
 			correction[ichain] = lcorrection[ichain];
 			voltage[ichain] = lvoltage[ichain];
 			temperature[ichain] = ltemperature[ichain];
+			nf_cal[ichain] = lnf_cal[ichain];
+			nf_pwr[ichain] = lnf_pwr[ichain];
 		}
 		/* the low frequency is good */
 		else if (frequency - lfrequency[ichain] < 1000) {
@@ -4992,12 +5079,26 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 						hfrequency[ichain],
 						lvoltage[ichain],
 						hvoltage[ichain]);
+
+				nf_cal[ichain] = interpolate(frequency,
+						lfrequency[ichain],
+						hfrequency[ichain],
+						lnf_cal[ichain],
+						hnf_cal[ichain]);
+
+				nf_pwr[ichain] = interpolate(frequency,
+						lfrequency[ichain],
+						hfrequency[ichain],
+						lnf_pwr[ichain],
+						hnf_pwr[ichain]);
 			}
 			/* only low is good, use it */
 			else {
 				correction[ichain] = lcorrection[ichain];
 				temperature[ichain] = ltemperature[ichain];
 				voltage[ichain] = lvoltage[ichain];
+				nf_cal[ichain] = lnf_cal[ichain];
+				nf_pwr[ichain] = lnf_pwr[ichain];
 			}
 		}
 		/* only high is good, use it */
@@ -5005,10 +5106,14 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 			correction[ichain] = hcorrection[ichain];
 			temperature[ichain] = htemperature[ichain];
 			voltage[ichain] = hvoltage[ichain];
+			nf_cal[ichain] = hnf_cal[ichain];
+			nf_pwr[ichain] = hnf_pwr[ichain];
 		} else {	/* nothing is good, presume 0???? */
 			correction[ichain] = 0;
 			temperature[ichain] = 0;
 			voltage[ichain] = 0;
+			nf_cal[ichain] = 0;
+			nf_pwr[ichain] = 0;
 		}
 	}
 
@@ -5019,6 +5124,16 @@ static int ar9003_hw_calibration_apply(struct ath_hw *ah, int frequency)
 		"for frequency=%d, calibration correction = %d %d %d\n",
 		frequency, correction[0], correction[1], correction[2]);
 
+	/* Store calibrated noise floor values */
+	for (ichain = 0; ichain < AR5416_MAX_CHAINS; ichain++)
+		if (mode) {
+			ah->nf_5g.cal[ichain] = nf_cal[ichain];
+			ah->nf_5g.pwr[ichain] = nf_pwr[ichain];
+		} else {
+			ah->nf_2g.cal[ichain] = nf_cal[ichain];
+			ah->nf_2g.pwr[ichain] = nf_pwr[ichain];
+		}
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
index bd2269c7de6b..e8fda54acfe3 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
@@ -62,6 +62,16 @@
  */
 #define AR9300_PWR_TABLE_OFFSET  0
 
+/* Noise power data definitions
+ * units are: 4 x dBm - NOISE_PWR_DATA_OFFSET
+ * (e.g. -25 = (-25/4 - 90) = -96.25 dBm)
+ * range (for 6 signed bits) is (-32 to 31) + offset => -122dBm to -59dBm
+ * resolution (2 bits) is 0.25dBm
+ */
+#define NOISE_PWR_DATA_OFFSET	-90
+#define NOISE_PWR_DBM_2_INT(_p)	((((_p) + 3) >> 2) + NOISE_PWR_DATA_OFFSET)
+#define N2DBM(_p)		NOISE_PWR_DBM_2_INT(_p)
+
 /* byte addressable */
 #define AR9300_EEPROM_SIZE (16*1024)
 
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 13ab6bc46775..3d9447e21025 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -58,19 +58,25 @@ static struct ath_nf_limits *ath9k_hw_get_nf_limits(struct ath_hw *ah,
 }
 
 static s16 ath9k_hw_get_default_nf(struct ath_hw *ah,
-				   struct ath9k_channel *chan)
+				   struct ath9k_channel *chan,
+				   int chain)
 {
-	return ath9k_hw_get_nf_limits(ah, chan)->nominal;
+	s16 calib_nf = ath9k_hw_get_nf_limits(ah, chan)->cal[chain];
+
+	if (calib_nf)
+		return calib_nf;
+	else
+		return ath9k_hw_get_nf_limits(ah, chan)->nominal;
 }
 
 s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan,
 			   s16 nf)
 {
-	s8 noise = ATH_DEFAULT_NOISE_FLOOR;
+	s8 noise = ath9k_hw_get_default_nf(ah, chan, 0);
 
 	if (nf) {
 		s8 delta = nf - ATH9K_NF_CAL_NOISE_THRESH -
-			   ath9k_hw_get_default_nf(ah, chan);
+			   ath9k_hw_get_default_nf(ah, chan, 0);
 		if (delta > 0)
 			noise += delta;
 	}
@@ -240,7 +246,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
 	unsigned i, j;
 	u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
 	struct ath_common *common = ath9k_hw_common(ah);
-	s16 default_nf = ath9k_hw_get_default_nf(ah, chan);
+	s16 default_nf = ath9k_hw_get_nf_limits(ah, chan)->nominal;
 	u32 bb_agc_ctl = REG_READ(ah, AR_PHY_AGC_CONTROL);
 
 	if (ah->caldata)
@@ -258,8 +264,13 @@ int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
 				nfval = ah->nf_override;
 			else if (h)
 				nfval = h[i].privNF;
-			else
-				nfval = default_nf;
+			else {
+				/* Try to get calibrated noise floor value */
+				nfval =
+				    ath9k_hw_get_nf_limits(ah, chan)->cal[i];
+				if (nfval > -60 || nfval < -127)
+					nfval = default_nf;
+			}
 
 			REG_RMW(ah, ah->nf_regs[i],
 				(((u32) nfval << 1) & 0x1ff), 0x1ff);
@@ -429,20 +440,19 @@ void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
 				  struct ath9k_channel *chan)
 {
 	struct ath9k_nfcal_hist *h;
-	s16 default_nf;
-	int i, j;
+	int i, j, k = 0;
 
 	ah->caldata->channel = chan->channel;
 	ah->caldata->channelFlags = chan->channelFlags;
 	h = ah->caldata->nfCalHist;
-	default_nf = ath9k_hw_get_default_nf(ah, chan);
 	for (i = 0; i < NUM_NF_READINGS; i++) {
 		h[i].currIndex = 0;
-		h[i].privNF = default_nf;
+		h[i].privNF = ath9k_hw_get_default_nf(ah, chan, k);
 		h[i].invalidNFcount = AR_PHY_CCA_FILTERWINDOW_LENGTH;
-		for (j = 0; j < ATH9K_NF_CAL_HIST_MAX; j++) {
-			h[i].nfCalBuffer[j] = default_nf;
-		}
+		for (j = 0; j < ATH9K_NF_CAL_HIST_MAX; j++)
+			h[i].nfCalBuffer[j] = h[i].privNF;
+		if (++k >= AR5416_MAX_CHAINS)
+			k = 0;
 	}
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/common-spectral.h b/drivers/net/wireless/ath/ath9k/common-spectral.h
index 5d1a51d83aa6..303ab470ce34 100644
--- a/drivers/net/wireless/ath/ath9k/common-spectral.h
+++ b/drivers/net/wireless/ath/ath9k/common-spectral.h
@@ -151,7 +151,7 @@ static inline u8 spectral_bitmap_weight(u8 *bins)
 	return bins[0] & 0x3f;
 }
 
-#ifdef CONFIG_ATH9K_COMMON_DEBUG
+#ifdef CONFIG_ATH9K_COMMON_SPECTRAL
 void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, struct dentry *debugfs_phy);
 void ath9k_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv);
 
@@ -183,6 +183,6 @@ static inline int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv,
 {
 	return 0;
 }
-#endif /* CONFIG_ATH9K_COMMON_DEBUG */
+#endif /* CONFIG_ATH9K_COMMON_SPECTRAL */
 
 #endif /* SPECTRAL_H */
diff --git a/drivers/net/wireless/ath/ath9k/dfs.c b/drivers/net/wireless/ath/ath9k/dfs.c
index 40a397fd0e0e..6fee9a464cce 100644
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -123,11 +123,9 @@ static bool ath9k_check_chirping(struct ath_softc *sc, u8 *data,
 			fft = (struct ath9k_dfs_fft_40 *) (data + 2);
 			ath_dbg(common, DFS, "fixing datalen by 2\n");
 		}
-		if (IS_CHAN_HT40MINUS(ah->curchan)) {
-			int temp = is_ctl;
-			is_ctl = is_ext;
-			is_ext = temp;
-		}
+		if (IS_CHAN_HT40MINUS(ah->curchan))
+			swap(is_ctl, is_ext);
+
 		for (i = 0; i < FFT_NUM_SAMPLES; i++)
 			max_bin[i] = ath9k_get_max_index_ht40(fft + i, is_ctl,
 							      is_ext);
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index f808e5833d7e..a82ad739ab80 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -1683,6 +1683,10 @@ static int ath9k_htc_ampdu_action(struct ieee80211_hw *hw,
 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 		break;
 	case IEEE80211_AMPDU_TX_OPERATIONAL:
+		if (tid >= ATH9K_HTC_MAX_TID) {
+			ret = -EINVAL;
+			break;
+		}
 		ista = (struct ath9k_htc_sta *) sta->drv_priv;
 		spin_lock_bh(&priv->tx.tx_lock);
 		ista->tid_state[tid] = AGGR_OPERATIONAL;
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 8c5c2dd8fa7f..cd0f023ccf77 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -922,6 +922,7 @@ static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah,
 		AR_IMR_RXERR |
 		AR_IMR_RXORN |
 		AR_IMR_BCNMISC;
+	u32 msi_cfg = 0;
 
 	if (AR_SREV_9340(ah) || AR_SREV_9550(ah) || AR_SREV_9531(ah) ||
 	    AR_SREV_9561(ah))
@@ -929,22 +930,30 @@ static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah,
 
 	if (AR_SREV_9300_20_OR_LATER(ah)) {
 		imr_reg |= AR_IMR_RXOK_HP;
-		if (ah->config.rx_intr_mitigation)
+		if (ah->config.rx_intr_mitigation) {
 			imr_reg |= AR_IMR_RXINTM | AR_IMR_RXMINTR;
-		else
+			msi_cfg |= AR_INTCFG_MSI_RXINTM | AR_INTCFG_MSI_RXMINTR;
+		} else {
 			imr_reg |= AR_IMR_RXOK_LP;
-
+			msi_cfg |= AR_INTCFG_MSI_RXOK;
+		}
 	} else {
-		if (ah->config.rx_intr_mitigation)
+		if (ah->config.rx_intr_mitigation) {
 			imr_reg |= AR_IMR_RXINTM | AR_IMR_RXMINTR;
-		else
+			msi_cfg |= AR_INTCFG_MSI_RXINTM | AR_INTCFG_MSI_RXMINTR;
+		} else {
 			imr_reg |= AR_IMR_RXOK;
+			msi_cfg |= AR_INTCFG_MSI_RXOK;
+		}
 	}
 
-	if (ah->config.tx_intr_mitigation)
+	if (ah->config.tx_intr_mitigation) {
 		imr_reg |= AR_IMR_TXINTM | AR_IMR_TXMINTR;
-	else
+		msi_cfg |= AR_INTCFG_MSI_TXINTM | AR_INTCFG_MSI_TXMINTR;
+	} else {
 		imr_reg |= AR_IMR_TXOK;
+		msi_cfg |= AR_INTCFG_MSI_TXOK;
+	}
 
 	ENABLE_REGWRITE_BUFFER(ah);
 
@@ -952,6 +961,16 @@ static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah,
 	ah->imrs2_reg |= AR_IMR_S2_GTT;
 	REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
 
+	if (ah->msi_enabled) {
+		ah->msi_reg = REG_READ(ah, AR_PCIE_MSI);
+		ah->msi_reg |= AR_PCIE_MSI_HW_DBI_WR_EN;
+		ah->msi_reg &= AR_PCIE_MSI_HW_INT_PENDING_ADDR_MSI_64;
+		REG_WRITE(ah, AR_INTCFG, msi_cfg);
+		ath_dbg(ath9k_hw_common(ah), ANY,
+			"value of AR_INTCFG=0x%X, msi_cfg=0x%X\n",
+			REG_READ(ah, AR_INTCFG), msi_cfg);
+	}
+
 	if (!AR_SREV_9100(ah)) {
 		REG_WRITE(ah, AR_INTR_SYNC_CAUSE, 0xFFFFFFFF);
 		REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 4ac70827d142..9804a24a2dc0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -754,6 +754,8 @@ struct ath_nf_limits {
 	s16 max;
 	s16 min;
 	s16 nominal;
+	s16 cal[AR5416_MAX_CHAINS];
+	s16 pwr[AR5416_MAX_CHAINS];
 };
 
 enum ath_cal_list {
@@ -977,6 +979,9 @@ struct ath_hw {
 	bool tpc_enabled;
 	u8 tx_power[Ar5416RateSize];
 	u8 tx_power_stbc[Ar5416RateSize];
+	bool msi_enabled;
+	u32 msi_mask;
+	u32 msi_reg;
 };
 
 struct ath_bus_ops {
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index fa58a32227f5..e479fae5aab9 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -23,6 +23,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <linux/relay.h>
+#include <linux/dmi.h>
 #include <net/ieee80211_radiotap.h>
 
 #include "ath9k.h"
@@ -75,6 +76,10 @@ MODULE_PARM_DESC(use_chanctx, "Enable channel context for concurrency");
 
 #endif /* CONFIG_ATH9K_CHANNEL_CONTEXT */
 
+int ath9k_use_msi;
+module_param_named(use_msi, ath9k_use_msi, int, 0444);
+MODULE_PARM_DESC(use_msi, "Use MSI instead of INTx if possible");
+
 bool is_ath9k_unloaded;
 
 #ifdef CONFIG_MAC80211_LEDS
@@ -92,6 +97,56 @@ static const struct ieee80211_tpt_blink ath9k_tpt_blink[] = {
 };
 #endif
 
+static int __init set_use_msi(const struct dmi_system_id *dmi)
+{
+	ath9k_use_msi = 1;
+	return 1;
+}
+
+static const struct dmi_system_id ath9k_quirks[] __initconst = {
+	{
+		.callback = set_use_msi,
+		.ident = "Dell Inspiron 24-3460",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 24-3460"),
+		},
+	},
+	{
+		.callback = set_use_msi,
+		.ident = "Dell Vostro 3262",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3262"),
+		},
+	},
+	{
+		.callback = set_use_msi,
+		.ident = "Dell Inspiron 3472",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3472"),
+		},
+	},
+	{
+		.callback = set_use_msi,
+		.ident = "Dell Vostro 15-3572",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 15-3572"),
+		},
+	},
+	{
+		.callback = set_use_msi,
+		.ident = "Dell Inspiron 14-3473",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 14-3473"),
+		},
+	},
+	{}
+};
+
 static void ath9k_deinit_softc(struct ath_softc *sc);
 
 static void ath9k_op_ps_wakeup(struct ath_common *common)
@@ -1100,6 +1155,8 @@ static int __init ath9k_init(void)
 		goto err_pci_exit;
 	}
 
+	dmi_check_system(ath9k_quirks);
+
 	return 0;
 
  err_pci_exit:
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 77c94f9e7b61..58d02c19b6d0 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -832,6 +832,43 @@ static void __ath9k_hw_enable_interrupts(struct ath_hw *ah)
 	}
 	ath_dbg(common, INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
 		REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
+
+	if (ah->msi_enabled) {
+		u32 _msi_reg = 0;
+		u32 i = 0;
+		u32 msi_pend_addr_mask = AR_PCIE_MSI_HW_INT_PENDING_ADDR_MSI_64;
+
+		ath_dbg(ath9k_hw_common(ah), INTERRUPT,
+			"Enabling MSI, msi_mask=0x%X\n", ah->msi_mask);
+
+		REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, ah->msi_mask);
+		REG_WRITE(ah, AR_INTR_PRIO_ASYNC_MASK, ah->msi_mask);
+		ath_dbg(ath9k_hw_common(ah), INTERRUPT,
+			"AR_INTR_PRIO_ASYNC_ENABLE=0x%X, AR_INTR_PRIO_ASYNC_MASK=0x%X\n",
+			REG_READ(ah, AR_INTR_PRIO_ASYNC_ENABLE),
+			REG_READ(ah, AR_INTR_PRIO_ASYNC_MASK));
+
+		if (ah->msi_reg == 0)
+			ah->msi_reg = REG_READ(ah, AR_PCIE_MSI);
+
+		ath_dbg(ath9k_hw_common(ah), INTERRUPT,
+			"AR_PCIE_MSI=0x%X, ah->msi_reg = 0x%X\n",
+			AR_PCIE_MSI, ah->msi_reg);
+
+		i = 0;
+		do {
+			REG_WRITE(ah, AR_PCIE_MSI,
+				  (ah->msi_reg | AR_PCIE_MSI_ENABLE)
+				  & msi_pend_addr_mask);
+			_msi_reg = REG_READ(ah, AR_PCIE_MSI);
+			i++;
+		} while ((_msi_reg & AR_PCIE_MSI_ENABLE) == 0 && i < 200);
+
+		if (i >= 200)
+			ath_err(ath9k_hw_common(ah),
+				"%s: _msi_reg = 0x%X\n",
+				__func__, _msi_reg);
+	}
 }
 
 void ath9k_hw_resume_interrupts(struct ath_hw *ah)
@@ -878,12 +915,21 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah)
 	if (!(ints & ATH9K_INT_GLOBAL))
 		ath9k_hw_disable_interrupts(ah);
 
+	if (ah->msi_enabled) {
+		ath_dbg(common, INTERRUPT, "Clearing AR_INTR_PRIO_ASYNC_ENABLE\n");
+
+		REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, 0);
+		REG_READ(ah, AR_INTR_PRIO_ASYNC_ENABLE);
+	}
+
 	ath_dbg(common, INTERRUPT, "New interrupt mask 0x%x\n", ints);
 
 	mask = ints & ATH9K_INT_COMMON;
 	mask2 = 0;
 
+	ah->msi_mask = 0;
 	if (ints & ATH9K_INT_TX) {
+		ah->msi_mask |= AR_INTR_PRIO_TX;
 		if (ah->config.tx_intr_mitigation)
 			mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
 		else {
@@ -898,6 +944,7 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah)
 			mask |= AR_IMR_TXEOL;
 	}
 	if (ints & ATH9K_INT_RX) {
+		ah->msi_mask |= AR_INTR_PRIO_RXLP | AR_INTR_PRIO_RXHP;
 		if (AR_SREV_9300_20_OR_LATER(ah)) {
 			mask |= AR_IMR_RXERR | AR_IMR_RXOK_HP;
 			if (ah->config.rx_intr_mitigation) {
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 223606311261..645f0fbd9179 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -22,6 +22,8 @@
 #include <linux/module.h>
 #include "ath9k.h"
 
+extern int ath9k_use_msi;
+
 static const struct pci_device_id ath_pci_id_table[] = {
 	{ PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
 	{ PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
@@ -889,6 +891,7 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	u32 val;
 	int ret = 0;
 	char hw_name[64];
+	int msi_enabled = 0;
 
 	if (pcim_enable_device(pdev))
 		return -EIO;
@@ -960,7 +963,20 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	sc->mem = pcim_iomap_table(pdev)[0];
 	sc->driver_data = id->driver_data;
 
-	ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
+	if (ath9k_use_msi) {
+		if (pci_enable_msi(pdev) == 0) {
+			msi_enabled = 1;
+			dev_err(&pdev->dev, "Using MSI\n");
+		} else {
+			dev_err(&pdev->dev, "Using INTx\n");
+		}
+	}
+
+	if (!msi_enabled)
+		ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
+	else
+		ret = request_irq(pdev->irq, ath_isr, 0, "ath9k", sc);
+
 	if (ret) {
 		dev_err(&pdev->dev, "request_irq failed\n");
 		goto err_irq;
@@ -974,6 +990,9 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_init;
 	}
 
+	sc->sc_ah->msi_enabled = msi_enabled;
+	sc->sc_ah->msi_reg = 0;
+
 	ath9k_hw_name(sc->sc_ah, hw_name, sizeof(hw_name));
 	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
 		   hw_name, (unsigned long)sc->mem, pdev->irq);
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 2197aee2bb72..a8ac42c96d71 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -826,9 +826,9 @@ static int ath9k_rx_skb_preprocess(struct ath_softc *sc,
 	sc->rx.discard_next = false;
 
 	/*
-	 * Discard zero-length packets.
+	 * Discard zero-length packets and packets smaller than an ACK
 	 */
-	if (!rx_stats->rs_datalen) {
+	if (rx_stats->rs_datalen < 10) {
 		RX_STAT_INC(rx_len_err);
 		goto corrupt;
 	}
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 80ff69f99229..653e79611830 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -146,6 +146,14 @@
 #define AR_MACMISC_MISC_OBS_BUS_MSB_S   15
 #define AR_MACMISC_MISC_OBS_BUS_1       1
 
+#define AR_INTCFG               0x005C
+#define AR_INTCFG_MSI_RXOK      0x00000000
+#define AR_INTCFG_MSI_RXINTM    0x00000004
+#define AR_INTCFG_MSI_RXMINTR   0x00000006
+#define AR_INTCFG_MSI_TXOK      0x00000000
+#define AR_INTCFG_MSI_TXINTM    0x00000010
+#define AR_INTCFG_MSI_TXMINTR   0x00000018
+
 #define AR_DATABUF_SIZE		0x0060
 #define AR_DATABUF_SIZE_MASK	0x00000FFF
 
@@ -1256,6 +1264,13 @@ enum {
 #define AR_PCIE_MSI                             (AR_SREV_9340(ah) ? 0x40d8 : \
 						 (AR_SREV_9300_20_OR_LATER(ah) ? 0x40a4 : 0x4094))
 #define AR_PCIE_MSI_ENABLE                       0x00000001
+#define AR_PCIE_MSI_HW_DBI_WR_EN                 0x02000000
+#define AR_PCIE_MSI_HW_INT_PENDING_ADDR          0xFFA0C1FF /* bits 8..11: value must be 0x5060 */
+#define AR_PCIE_MSI_HW_INT_PENDING_ADDR_MSI_64   0xFFA0C9FF /* bits 8..11: value must be 0x5064 */
+
+#define AR_INTR_PRIO_TX               0x00000001
+#define AR_INTR_PRIO_RXLP             0x00000002
+#define AR_INTR_PRIO_RXHP             0x00000004
 
 #define AR_INTR_PRIO_SYNC_ENABLE  (AR_SREV_9340(ah) ? 0x4088 : 0x40c4)
 #define AR_INTR_PRIO_ASYNC_MASK   (AR_SREV_9340(ah) ? 0x408c : 0x40c8)