enic: Get/Set interrupt resource index for transmit and receive queues

Instead of deriving the index of a transmit/receive interrupt resource
from the transmit/receive queue index, always save and retrieve it
using an additional variable.

Signed-off-by: Christian Benvenuti <benve@cisco.com>
Signed-off-by: Danny Guo <dannguo@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David Wang <dwang2@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/enic/enic.h

@@ -32,7 +32,7 @@
 
 #define DRV_NAME		"enic"
 #define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"
-#define DRV_VERSION		"2.1.1.17"
+#define DRV_VERSION		"2.1.1.19"
 #define DRV_COPYRIGHT		"Copyright 2008-2011 Cisco Systems, Inc"
 
 #define ENIC_BARS_MAX		6

drivers/net/enic/enic_main.c

@@ -153,12 +153,12 @@ static inline unsigned int enic_legacy_notify_intr(void)
 
 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 {
-	return rq;
+	return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 }
 
 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 {
-	return enic->rq_count + wq;
+	return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 }
 
 static inline unsigned int enic_msix_err_intr(struct enic *enic)

drivers/net/enic/vnic_cq.c

@@ -74,6 +74,8 @@ void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
 	iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
 	iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
 	writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
+
+	cq->interrupt_offset = interrupt_offset;
 }
 
 void vnic_cq_clean(struct vnic_cq *cq)

drivers/net/enic/vnic_cq.h

@@ -57,6 +57,7 @@ struct vnic_cq {
 	struct vnic_dev_ring ring;
 	unsigned int to_clean;
 	unsigned int last_color;
+	unsigned int interrupt_offset;
 };
 
 static inline unsigned int vnic_cq_service(struct vnic_cq *cq,