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

Pull networking fixes and more updates from David Miller:

 1) Tunneling fixes from Tom Herbert and Alexander Duyck.

 2) AF_UNIX updates some struct sock bit fields with the socket lock,
    whereas setsockopt() sets overlapping ones with locking.  Seperate
    out the synchronized vs.  the AF_UNIX unsynchronized ones to avoid
    corruption.  From Andrey Ryabinin.

 3) Mount BPF filesystem with mount_nodev rather than mount_ns, from
    Eric Biederman.

 4) A couple kmemdup conversions, from Muhammad Falak R Wani.

 5) BPF verifier fixes from Alexei Starovoitov.

 6) Don't let tunneled UDP packets get stuck in socket queues, if
    something goes wrong during the encapsulation just drop the packet
    rather than signalling an error up the call stack.  From Hannes
    Frederic Sowa.

 7) SKB ref after free in batman-adv, from Florian Westphal.

 8) TCP iSCSI, ocfs2, rds, and tipc have to disable BH in it's TCP
    callbacks since the TCP stack runs pre-emptibly now.  From Eric
    Dumazet.

 9) Fix crash in fixed_phy_add, from Rabin Vincent.

10) Fix length checks in xen-netback, from Paul Durrant.

11) Fix mixup in KEY vs KEYID macsec attributes, from Sabrina Dubroca.

12) RDS connection spamming bug fixes from Sowmini Varadhan

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (152 commits)
  net: suppress warnings on dev_alloc_skb
  uapi glibc compat: fix compilation when !__USE_MISC in glibc
  udp: prevent skbs lingering in tunnel socket queues
  bpf: teach verifier to recognize imm += ptr pattern
  bpf: support decreasing order in direct packet access
  net: usb: ch9200: use kmemdup
  ps3_gelic: use kmemdup
  net:liquidio: use kmemdup
  bpf: Use mount_nodev not mount_ns to mount the bpf filesystem
  net: cdc_ncm: update datagram size after changing mtu
  tuntap: correctly wake up process during uninit
  intel: Add support for IPv6 IP-in-IP offload
  ip6_gre: Do not allow segmentation offloads GRE_CSUM is enabled with FOU/GUE
  RDS: TCP: Avoid rds connection churn from rogue SYNs
  RDS: TCP: rds_tcp_accept_worker() must exit gracefully when terminating rds-tcp
  net: sock: move ->sk_shutdown out of bitfields.
  ipv6: Don't reset inner headers in ip6_tnl_xmit
  ip4ip6: Support for GSO/GRO
  ip6ip6: Support for GSO/GRO
  ipv6: Set features for IPv6 tunnels
  ...

1 files changed, 72 insertions, 21 deletions

diff --git a/drivers/net/wireless/ath/wil6210/interrupt.c b/drivers/net/wireless/ath/wil6210/interrupt.c
index fe66b2b646f0..011e7412dcc0 100644
--- a/drivers/net/wireless/ath/wil6210/interrupt.c
+++ b/drivers/net/wireless/ath/wil6210/interrupt.c
@@ -35,15 +35,19 @@
  *
  */
 
-#define WIL6210_IRQ_DISABLE	(0xFFFFFFFFUL)
+#define WIL6210_IRQ_DISABLE		(0xFFFFFFFFUL)
+#define WIL6210_IRQ_DISABLE_NO_HALP	(0xF7FFFFFFUL)
 #define WIL6210_IMC_RX		(BIT_DMA_EP_RX_ICR_RX_DONE | \
 				 BIT_DMA_EP_RX_ICR_RX_HTRSH)
+#define WIL6210_IMC_RX_NO_RX_HTRSH (WIL6210_IMC_RX & \
+				    (~(BIT_DMA_EP_RX_ICR_RX_HTRSH)))
 #define WIL6210_IMC_TX		(BIT_DMA_EP_TX_ICR_TX_DONE | \
 				BIT_DMA_EP_TX_ICR_TX_DONE_N(0))
-#define WIL6210_IMC_MISC	(ISR_MISC_FW_READY | \
-				 ISR_MISC_MBOX_EVT | \
-				 ISR_MISC_FW_ERROR)
-
+#define WIL6210_IMC_MISC_NO_HALP	(ISR_MISC_FW_READY | \
+					 ISR_MISC_MBOX_EVT | \
+					 ISR_MISC_FW_ERROR)
+#define WIL6210_IMC_MISC		(WIL6210_IMC_MISC_NO_HALP | \
+					 BIT_DMA_EP_MISC_ICR_HALP)
 #define WIL6210_IRQ_PSEUDO_MASK (u32)(~(BIT_DMA_PSEUDO_CAUSE_RX | \
 					BIT_DMA_PSEUDO_CAUSE_TX | \
 					BIT_DMA_PSEUDO_CAUSE_MISC))
@@ -51,6 +55,7 @@
 #if defined(CONFIG_WIL6210_ISR_COR)
 /* configure to Clear-On-Read mode */
 #define WIL_ICR_ICC_VALUE	(0xFFFFFFFFUL)
+#define WIL_ICR_ICC_MISC_VALUE	(0xF7FFFFFFUL)
 
 static inline void wil_icr_clear(u32 x, void __iomem *addr)
 {
@@ -58,6 +63,7 @@ static inline void wil_icr_clear(u32 x, void __iomem *addr)
 #else /* defined(CONFIG_WIL6210_ISR_COR) */
 /* configure to Write-1-to-Clear mode */
 #define WIL_ICR_ICC_VALUE	(0UL)
+#define WIL_ICR_ICC_MISC_VALUE	(0UL)
 
 static inline void wil_icr_clear(u32 x, void __iomem *addr)
 {
@@ -86,10 +92,21 @@ static void wil6210_mask_irq_rx(struct wil6210_priv *wil)
 	      WIL6210_IRQ_DISABLE);
 }
 
-static void wil6210_mask_irq_misc(struct wil6210_priv *wil)
+static void wil6210_mask_irq_misc(struct wil6210_priv *wil, bool mask_halp)
 {
+	wil_dbg_irq(wil, "%s: mask_halp(%s)\n", __func__,
+		    mask_halp ? "true" : "false");
+
 	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMS),
-	      WIL6210_IRQ_DISABLE);
+	      mask_halp ? WIL6210_IRQ_DISABLE : WIL6210_IRQ_DISABLE_NO_HALP);
+}
+
+static void wil6210_mask_halp(struct wil6210_priv *wil)
+{
+	wil_dbg_irq(wil, "%s()\n", __func__);
+
+	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMS),
+	      BIT_DMA_EP_MISC_ICR_HALP);
 }
 
 static void wil6210_mask_irq_pseudo(struct wil6210_priv *wil)
@@ -109,14 +126,27 @@ void wil6210_unmask_irq_tx(struct wil6210_priv *wil)
 
 void wil6210_unmask_irq_rx(struct wil6210_priv *wil)
 {
+	bool unmask_rx_htrsh = test_bit(wil_status_fwconnected, wil->status);
+
 	wil_w(wil, RGF_DMA_EP_RX_ICR + offsetof(struct RGF_ICR, IMC),
-	      WIL6210_IMC_RX);
+	      unmask_rx_htrsh ? WIL6210_IMC_RX : WIL6210_IMC_RX_NO_RX_HTRSH);
 }
 
-static void wil6210_unmask_irq_misc(struct wil6210_priv *wil)
+static void wil6210_unmask_irq_misc(struct wil6210_priv *wil, bool unmask_halp)
 {
+	wil_dbg_irq(wil, "%s: unmask_halp(%s)\n", __func__,
+		    unmask_halp ? "true" : "false");
+
 	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMC),
-	      WIL6210_IMC_MISC);
+	      unmask_halp ? WIL6210_IMC_MISC : WIL6210_IMC_MISC_NO_HALP);
+}
+
+static void wil6210_unmask_halp(struct wil6210_priv *wil)
+{
+	wil_dbg_irq(wil, "%s()\n", __func__);
+
+	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, IMC),
+	      BIT_DMA_EP_MISC_ICR_HALP);
 }
 
 static void wil6210_unmask_irq_pseudo(struct wil6210_priv *wil)
@@ -134,7 +164,7 @@ void wil_mask_irq(struct wil6210_priv *wil)
 
 	wil6210_mask_irq_tx(wil);
 	wil6210_mask_irq_rx(wil);
-	wil6210_mask_irq_misc(wil);
+	wil6210_mask_irq_misc(wil, true);
 	wil6210_mask_irq_pseudo(wil);
 }
 
@@ -147,12 +177,12 @@ void wil_unmask_irq(struct wil6210_priv *wil)
 	wil_w(wil, RGF_DMA_EP_TX_ICR + offsetof(struct RGF_ICR, ICC),
 	      WIL_ICR_ICC_VALUE);
 	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICC),
-	      WIL_ICR_ICC_VALUE);
+	      WIL_ICR_ICC_MISC_VALUE);
 
 	wil6210_unmask_irq_pseudo(wil);
 	wil6210_unmask_irq_tx(wil);
 	wil6210_unmask_irq_rx(wil);
-	wil6210_unmask_irq_misc(wil);
+	wil6210_unmask_irq_misc(wil, true);
 }
 
 void wil_configure_interrupt_moderation(struct wil6210_priv *wil)
@@ -228,11 +258,8 @@ static irqreturn_t wil6210_irq_rx(int irq, void *cookie)
 	 */
 	if (likely(isr & (BIT_DMA_EP_RX_ICR_RX_DONE |
 			  BIT_DMA_EP_RX_ICR_RX_HTRSH))) {
-		wil_dbg_irq(wil, "RX done\n");
-
-		if (unlikely(isr & BIT_DMA_EP_RX_ICR_RX_HTRSH))
-			wil_err_ratelimited(wil,
-					    "Received \"Rx buffer is in risk of overflow\" interrupt\n");
+		wil_dbg_irq(wil, "RX done / RX_HTRSH received, ISR (0x%x)\n",
+			    isr);
 
 		isr &= ~(BIT_DMA_EP_RX_ICR_RX_DONE |
 			 BIT_DMA_EP_RX_ICR_RX_HTRSH);
@@ -344,7 +371,7 @@ static irqreturn_t wil6210_irq_misc(int irq, void *cookie)
 		return IRQ_NONE;
 	}
 
-	wil6210_mask_irq_misc(wil);
+	wil6210_mask_irq_misc(wil, false);
 
 	if (isr & ISR_MISC_FW_ERROR) {
 		u32 fw_assert_code = wil_r(wil, RGF_FW_ASSERT_CODE);
@@ -372,12 +399,19 @@ static irqreturn_t wil6210_irq_misc(int irq, void *cookie)
 		isr &= ~ISR_MISC_FW_READY;
 	}
 
+	if (isr & BIT_DMA_EP_MISC_ICR_HALP) {
+		wil_dbg_irq(wil, "%s: HALP IRQ invoked\n", __func__);
+		wil6210_mask_halp(wil);
+		isr &= ~BIT_DMA_EP_MISC_ICR_HALP;
+		complete(&wil->halp.comp);
+	}
+
 	wil->isr_misc = isr;
 
 	if (isr) {
 		return IRQ_WAKE_THREAD;
 	} else {
-		wil6210_unmask_irq_misc(wil);
+		wil6210_unmask_irq_misc(wil, false);
 		return IRQ_HANDLED;
 	}
 }
@@ -414,7 +448,7 @@ static irqreturn_t wil6210_irq_misc_thread(int irq, void *cookie)
 
 	wil->isr_misc = 0;
 
-	wil6210_unmask_irq_misc(wil);
+	wil6210_unmask_irq_misc(wil, false);
 
 	return IRQ_HANDLED;
 }
@@ -556,6 +590,23 @@ void wil6210_clear_irq(struct wil6210_priv *wil)
 	wmb(); /* make sure write completed */
 }
 
+void wil6210_set_halp(struct wil6210_priv *wil)
+{
+	wil_dbg_misc(wil, "%s()\n", __func__);
+
+	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICS),
+	      BIT_DMA_EP_MISC_ICR_HALP);
+}
+
+void wil6210_clear_halp(struct wil6210_priv *wil)
+{
+	wil_dbg_misc(wil, "%s()\n", __func__);
+
+	wil_w(wil, RGF_DMA_EP_MISC_ICR + offsetof(struct RGF_ICR, ICR),
+	      BIT_DMA_EP_MISC_ICR_HALP);
+	wil6210_unmask_halp(wil);
+}
+
 int wil6210_init_irq(struct wil6210_priv *wil, int irq, bool use_msi)
 {
 	int rc;