NTB: Fix Sparse Warnings

Address the sparse warnings and resulting fallout

Signed-off-by: Jon Mason <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/ntb/ntb_hw.c

···
  * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
  */
 int ntb_register_event_callback(struct ntb_device *ndev,
-				void (*func)(void *handle, unsigned int event))
+			    void (*func)(void *handle, enum ntb_hw_event event))
 {
 	if (ndev->event_cb)
 		return -EINVAL;
···
  *
  * RETURNS: pointer to virtual address, or NULL on error.
  */
-void *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw)
+void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw)
 {
 	if (mw > NTB_NUM_MW)
 		return NULL;

drivers/ntb/ntb_hw.h

···
 void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx);
 int ntb_register_event_callback(struct ntb_device *ndev,
 				void (*event_cb_func) (void *handle,
-						       unsigned int event));
+						      enum ntb_hw_event event));
 void ntb_unregister_event_callback(struct ntb_device *ndev);
 int ntb_get_max_spads(struct ntb_device *ndev);
 int ntb_write_local_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
 int ntb_read_local_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
 int ntb_write_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
 int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
-void *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
+void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
 resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw);
 void ntb_ring_sdb(struct ntb_device *ndev, unsigned int idx);
 void *ntb_find_transport(struct pci_dev *pdev);

drivers/ntb/ntb_transport.c

···
 #include <linux/ntb.h>
 #include "ntb_hw.h"
 
-#define NTB_TRANSPORT_VERSION	1
+#define NTB_TRANSPORT_VERSION	2
 
 static unsigned int transport_mtu = 0x401E;
 module_param(transport_mtu, uint, 0644);
···
 	bool qp_link;
 	u8 qp_num;	/* Only 64 QP's are allowed.  0-63 */
 
-	struct ntb_rx_info *rx_info;
+	struct ntb_rx_info __iomem *rx_info;
 	struct ntb_rx_info *remote_rx_info;
 
 	void (*tx_handler) (struct ntb_transport_qp *qp, void *qp_data,
 			    void *data, int len);
 	struct list_head tx_free_q;
 	spinlock_t ntb_tx_free_q_lock;
-	void *tx_mw;
+	void __iomem *tx_mw;
 	unsigned int tx_index;
 	unsigned int tx_max_entry;
 	unsigned int tx_max_frame;
···
 };
 
 struct ntb_payload_header {
-	u64 ver;
+	unsigned int ver;
 	unsigned int len;
 	unsigned int flags;
 };
···
 	u8 mw_num = QP_TO_MW(qp_num);
 	unsigned int i;
 
-	WARN_ON(nt->mw[mw_num].virt_addr == 0);
+	WARN_ON(nt->mw[mw_num].virt_addr == NULL);
 
 	if (nt->max_qps % NTB_NUM_MW && mw_num < nt->max_qps % NTB_NUM_MW)
 		num_qps_mw = nt->max_qps / NTB_NUM_MW + 1;
···
 	entry = ntb_list_rm(&qp->ntb_rx_pend_q_lock, &qp->rx_pend_q);
 	if (!entry) {
 		dev_dbg(&ntb_query_pdev(qp->ndev)->dev,
-			"no buffer - HDR ver %llu, len %d, flags %x\n",
+			"no buffer - HDR ver %u, len %d, flags %x\n",
 			hdr->ver, hdr->len, hdr->flags);
 		qp->rx_err_no_buf++;
 		return -ENOMEM;
···
 		return -EAGAIN;
 	}
 
-	if (hdr->ver != qp->rx_pkts) {
+	if (hdr->ver != (u32) qp->rx_pkts) {
 		dev_dbg(&ntb_query_pdev(qp->ndev)->dev,
-			"qp %d: version mismatch, expected %llu - got %llu\n",
+			"qp %d: version mismatch, expected %llu - got %u\n",
 			qp->qp_num, qp->rx_pkts, hdr->ver);
 		ntb_list_add(&qp->ntb_rx_pend_q_lock, &entry->entry,
 			     &qp->rx_pend_q);
···
 	}
 
 	dev_dbg(&ntb_query_pdev(qp->ndev)->dev,
-		"rx offset %u, ver %llu - %d payload received, buf size %d\n",
+		"rx offset %u, ver %u - %d payload received, buf size %d\n",
 		qp->rx_index, hdr->ver, hdr->len, entry->len);
 
 	if (hdr->len <= entry->len) {
···
 	/* Ensure that the data is fully copied out before clearing the flag */
 	wmb();
 	hdr->flags = 0;
-	qp->rx_info->entry = qp->rx_index;
+	iowrite32(qp->rx_index, &qp->rx_info->entry);
 
 	qp->rx_index++;
 	qp->rx_index %= qp->rx_max_entry;
···
 
 static void ntb_tx_copy_task(struct ntb_transport_qp *qp,
 			     struct ntb_queue_entry *entry,
-			     void *offset)
+			     void __iomem *offset)
 {
-	struct ntb_payload_header *hdr;
+	struct ntb_payload_header __iomem *hdr;
 
 	memcpy_toio(offset, entry->buf, entry->len);
 
 	hdr = offset + qp->tx_max_frame - sizeof(struct ntb_payload_header);
-	hdr->len = entry->len;
-	hdr->ver = qp->tx_pkts;
+	iowrite32(entry->len, &hdr->len);
+	iowrite32((u32) qp->tx_pkts, &hdr->ver);
 
 	/* Ensure that the data is fully copied out before setting the flag */
 	wmb();
-	hdr->flags = entry->flags | DESC_DONE_FLAG;
+	iowrite32(entry->flags | DESC_DONE_FLAG, &hdr->flags);
 
 	ntb_ring_sdb(qp->ndev, qp->qp_num);
 
···
 static int ntb_process_tx(struct ntb_transport_qp *qp,
 			  struct ntb_queue_entry *entry)
 {
-	void *offset;
+	void __iomem *offset;
 
 	offset = qp->tx_mw + qp->tx_max_frame * qp->tx_index;