---
 drivers/net/niu.c |   61 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 60 insertions(+), 1 deletions(-)

diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index 2b17453..a40653e 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -4210,26 +4210,85 @@ static void __niu_fastpath_interrupt(struct niu *np, int ldg, u64 v0)
 			continue;
 
 		nw64(LD_IM0(ldn), LD_IM0_MASK);
 		if (tx_vec & (1 << rp->tx_channel))
 			niu_txchan_intr(np, rp, ldn);
 	}
 }
 
+// HHP
+static void niu_dump_ldg_irq(struct niu *np, int ldg, u64 v0)
+{
+	static DEFINE_PER_CPU(unsigned long, spurious_count) = { 4 };
+
+	struct niu_parent *parent = np->parent;
+	u64 ld_im0_reg, ldg_imgmt_reg;
+	u32 rx_vec, tx_vec;
+	int ldn, i;
+
+	if (!__get_cpu_var(spurious_count))
+		return;
+
+	__get_cpu_var(spurious_count)--;
+	printk(KERN_DEBUG "NIU: %s CPU=%i LDG=%i: interrupt received while NAPI is in progress\n",
+	       np->dev->name, smp_processor_id(), ldg);
+
+	tx_vec = (v0 >> 32);
+	rx_vec = (v0 & 0xffffffff);
+
+	for (i = 0; i < np->num_rx_rings; i++) {
+		struct rx_ring_info *rp = &np->rx_rings[i];
+
+		ldn = LDN_RXDMA(rp->rx_channel);
+		if (parent->ldg_map[ldn] != ldg)
+			continue;
+
+		ld_im0_reg    = LD_IM0(ldn);
+		ldg_imgmt_reg = LDG_IMGMT(ldn);
+		printk(KERN_DEBUG "  rx_vec=0x%04x LD_IM0[ldf_mask]=0x%02lx\n",
+		       rx_vec,
+		       (unsigned long)(ld_im0_reg & LD_IM0_MASK)),
+		printk(KERN_DEBUG "  LDG_IMGMT=0x%016lx [arm=0x%02lx timer=0x%02lx]\n",
+		       (unsigned long)ldg_imgmt_reg,
+		       (unsigned long)((ldg_imgmt_reg & LDG_IMGMT_ARM) >> 31),
+		       (unsigned long)(ldg_imgmt_reg & LDG_IMGMT_TIMER));
+	}
+
+	/* Spurious TX interrupts should not happen */
+	for (i = 0; i < np->num_tx_rings; i++) {
+		struct tx_ring_info *rp = &np->tx_rings[i];
+		ldn = LDN_TXDMA(rp->tx_channel);
+
+		if (parent->ldg_map[ldn] != ldg)
+			continue;
+
+		ld_im0_reg    = LD_IM0(ldn);
+		ldg_imgmt_reg = LDG_IMGMT(ldn);
+		printk(KERN_DEBUG "  tx_vec=0x%04x LD_IM0[ldf_mask]=0x%02lx\n",
+		       tx_vec,
+		       (unsigned long)(ld_im0_reg & LD_IM0_MASK)),
+		printk(KERN_DEBUG "  LDG_IMGMT=0x%016lx [arm=0x%02lx timer=0x%02lx]\n",
+		       (unsigned long)ldg_imgmt_reg,
+		       (unsigned long)((ldg_imgmt_reg & LDG_IMGMT_ARM) >> 31),
+		       (unsigned long)(ldg_imgmt_reg & LDG_IMGMT_TIMER));
+	}
+}
+
 static void niu_schedule_napi(struct niu *np, struct niu_ldg *lp,
 			      u64 v0, u64 v1, u64 v2)
 {
 	if (likely(napi_schedule_prep(&lp->napi))) {
 		lp->v0 = v0;
 		lp->v1 = v1;
 		lp->v2 = v2;
 		__niu_fastpath_interrupt(np, lp->ldg_num, v0);
 		__napi_schedule(&lp->napi);
-	}
+	} else
+		niu_dump_ldg_irq(np, lp->ldg_num, v0);
 }
 
 static irqreturn_t niu_interrupt(int irq, void *dev_id)
 {
 	struct niu_ldg *lp = dev_id;
 	struct niu *np = lp->np;
 	int ldg = lp->ldg_num;
 	unsigned long flags;