diff --git a/configs/fire-stm32v2/src/stm32_enc28j60.c b/configs/fire-stm32v2/src/stm32_enc28j60.c
index 9ac4040e4b..89625b6eb7 100644
--- a/configs/fire-stm32v2/src/stm32_enc28j60.c
+++ b/configs/fire-stm32v2/src/stm32_enc28j60.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * configs/fire-stm32v2/src/stm32_enc28j60.c
  *
- *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2012, 2017 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -106,13 +106,15 @@ struct stm32_lower_s
 {
   const struct enc_lower_s lower;    /* Low-level MCU interface */
   xcpt_t                   handler;  /* ENC28J60 interrupt handler */
+  FAR void                *arg;      /* Argument that accompanies the interrupt */
 };
 
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
 
-static int  up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler);
+static int  up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
+                      FAR void *arg);
 static void up_enable(FAR const struct enc_lower_s *lower);
 static void up_disable(FAR const struct enc_lower_s *lower);
 
@@ -134,6 +136,7 @@ static struct stm32_lower_s g_enclower =
     .disable = up_disable
   },
   .handler = NULL,
+  .arg     = NULL
 };
 
 /****************************************************************************
@@ -144,13 +147,15 @@ static struct stm32_lower_s g_enclower =
  * Name: struct enc_lower_s methods
  ****************************************************************************/
 
-static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler)
+static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
+                     FAR void *arg)
 {
   FAR struct stm32_lower_s *priv = (FAR struct stm32_lower_s *)lower;
 
   /* Just save the handler for use when the interrupt is enabled */
 
   priv->handler = handler;
+  priv->arg     = arg;
   return OK;
 }
 
@@ -160,9 +165,14 @@ static void up_enable(FAR const struct enc_lower_s *lower)
 
   DEBUGASSERT(priv->handler);
   (void)stm32_gpiosetevent(GPIO_ENC28J60_INTR, false, true, true,
-                           priv->handler, NULL);
+                           priv->handler, priv->arg);
 }
 
+/* REVISIT:  Since the interrupt is completely torn down, not just disabled,
+ * in interrupt requests that occurs while the interrupt is disabled will be
+ * lost.
+ */
+
 static void up_disable(FAR const struct enc_lower_s *lower)
 {
   (void)stm32_gpiosetevent(GPIO_ENC28J60_INTR, false, true, true,
diff --git a/configs/olimex-strp711/src/str71_enc28j60.c b/configs/olimex-strp711/src/str71_enc28j60.c
index 5b40eb1357..d45b392c7f 100644
--- a/configs/olimex-strp711/src/str71_enc28j60.c
+++ b/configs/olimex-strp711/src/str71_enc28j60.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * configs/olimex-strp711/src/str71_enc28j60.c
  *
- *   Copyright (C) 2010, 2012 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010, 2012, 2017 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -154,7 +154,8 @@
  * Private Function Prototypes
  ****************************************************************************/
 
-static int  up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler);
+static int  up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
+                      FAR void *arg);
 static void up_enable(FAR const struct enc_lower_s *lower);
 static void up_disable(FAR const struct enc_lower_s *lower);
 
@@ -182,9 +183,10 @@ static const struct enc_lower_s g_enclower =
  * Name: struct enc_lower_s methods
  ****************************************************************************/
 
-static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler)
+static int up_attach(FAR const struct enc_lower_s *lower, xcpt_t handler,
+                     FAR void *arg)
 {
-  return irq_attach(ENC28J60_IRQ, handler, NULL);
+  return irq_attach(ENC28J60_IRQ, handler, arg);
 }
 
 static void up_enable(FAR const struct enc_lower_s *lower)
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index a719f43d7a..23c4c77067 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -1833,7 +1833,10 @@ static void enc_irqworker(FAR void *arg)
 
 static int enc_interrupt(int irq, FAR void *context, FAR void *arg)
 {
-  register FAR struct enc_driver_s *priv = &g_enc28j60[0];
+  FAR struct enc_driver_s *priv;
+
+  DEBUGASSERT(arg != NULL);
+  priv = (FAR struct enc_driver_s *)arg;
 
   /* In complex environments, we cannot do SPI transfers from the interrupt
    * handler because semaphores are probably used to lock the SPI bus.  In
@@ -2648,7 +2651,7 @@ int enc_initialize(FAR struct spi_dev_s *spi,
 
   /* Attach the interrupt to the driver (but don't enable it yet) */
 
-  if (lower->attach(lower, enc_interrupt))
+  if (lower->attach(lower, enc_interrupt, priv) < 0)
     {
       /* We could not attach the ISR to the interrupt */
 
diff --git a/drivers/net/encx24j600.c b/drivers/net/encx24j600.c
index 58633d307a..5c2b590e2e 100644
--- a/drivers/net/encx24j600.c
+++ b/drivers/net/encx24j600.c
@@ -1,6 +1,7 @@
 /****************************************************************************
  * drivers/net/encx24j600.c
  *
+ *   Copyright (C) 2017 Gregory Nutt. All rights reserved.
  *   Copyright (C) 2013-2014 UVC Ingenieure. All rights reserved.
  *   Author: Max Holtzberg <mh@uvc.de>
  *
@@ -1976,7 +1977,7 @@ static void enc_irqworker(FAR void *arg)
 
 static int enc_interrupt(int irq, FAR void *context, FAR void *arg)
 {
-  FAR struct enc_driver_s *priv = &g_encx24j600[0];
+  FAR struct enc_driver_s *priv;
 
   DEBUGASSERT(arg != NULL);
   priv = (FAR struct enc_driver_s *)arg;
diff --git a/include/nuttx/net/enc28j60.h b/include/nuttx/net/enc28j60.h
index 78b394ec9f..f2fed8052d 100644
--- a/include/nuttx/net/enc28j60.h
+++ b/include/nuttx/net/enc28j60.h
@@ -1,7 +1,7 @@
 /****************************************************************************
  * include/nuttx/net/enc28j60.h
  *
- *   Copyright (C) 2010, 2012, 2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010, 2012, 2015, 2017 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -86,7 +86,8 @@
 
 struct enc_lower_s
 {
-  int  (*attach)(FAR const struct enc_lower_s *lower, xcpt_t handler);
+  int  (*attach)(FAR const struct enc_lower_s *lower, xcpt_t handler,
+                 FAR void *arg);
   void (*enable)(FAR const struct enc_lower_s *lower);
   void (*disable)(FAR const struct enc_lower_s *lower);
 };
diff --git a/include/nuttx/net/encx24j600.h b/include/nuttx/net/encx24j600.h
index 2d1b055005..16b9de747f 100644
--- a/include/nuttx/net/encx24j600.h
+++ b/include/nuttx/net/encx24j600.h
@@ -1,7 +1,7 @@
 /****************************************************************************
  * include/nuttx/net/encx24j600.h
  *
- *   Copyright (C) 2013, 2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2013, 2015, 2017 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without