intelfb delousing

ring_head is offset in card memory, not iomem pointer.  Fixed, removed
fuckloads of amazingly bogus casts somebody had sprinkled all over the
place.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/video/intelfb/intelfb.h

@@ -237,7 +237,7 @@ struct intelfb_info {
 	u32 fb_start;
 
 	/* ring buffer */
-	u8 __iomem *ring_head;
+	u32 ring_head;
 	u32 ring_tail;
 	u32 ring_tail_mask;
 	u32 ring_space;

drivers/video/intelfb/intelfbdrv.c

@@ -707,7 +707,7 @@ intelfb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
 			+ (dinfo->ring.offset << 12);
 		dinfo->ring.virtual  = dinfo->aperture.virtual
 			+ (dinfo->ring.offset << 12);
-		dinfo->ring_head = dinfo->ring.virtual;
+		dinfo->ring_head = 0;
 	}
 	if (dinfo->hwcursor) {
 		agp_memtype = dinfo->mobile ? AGP_PHYSICAL_MEMORY
@@ -766,18 +766,18 @@ intelfb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (mtrr)
 		set_mtrr(dinfo);
 
-	DBG_MSG("fb: 0x%x(+ 0x%x)/0x%x (0x%x)\n",
+	DBG_MSG("fb: 0x%x(+ 0x%x)/0x%x (0x%p)\n",
 		dinfo->fb.physical, dinfo->fb.offset, dinfo->fb.size,
-		(u32 __iomem ) dinfo->fb.virtual);
-	DBG_MSG("MMIO: 0x%x/0x%x (0x%x)\n",
+		dinfo->fb.virtual);
+	DBG_MSG("MMIO: 0x%x/0x%x (0x%p)\n",
 		dinfo->mmio_base_phys, INTEL_REG_SIZE,
-		(u32 __iomem) dinfo->mmio_base);
-	DBG_MSG("ring buffer: 0x%x/0x%x (0x%x)\n",
+		dinfo->mmio_base);
+	DBG_MSG("ring buffer: 0x%x/0x%x (0x%p)\n",
 		dinfo->ring.physical, dinfo->ring.size,
-		(u32 __iomem ) dinfo->ring.virtual);
-	DBG_MSG("HW cursor: 0x%x/0x%x (0x%x) (offset 0x%x) (phys 0x%x)\n",
+		dinfo->ring.virtual);
+	DBG_MSG("HW cursor: 0x%x/0x%x (0x%p) (offset 0x%x) (phys 0x%x)\n",
 		dinfo->cursor.physical, dinfo->cursor.size,
-		(u32 __iomem ) dinfo->cursor.virtual, dinfo->cursor.offset,
+		dinfo->cursor.virtual, dinfo->cursor.offset,
 		dinfo->cursor.physical);
 
 	DBG_MSG("options: vram = %d, accel = %d, hwcursor = %d, fixed = %d, "

drivers/video/intelfb/intelfbhw.c

@@ -1423,19 +1423,17 @@ wait_ring(struct intelfb_info *dinfo, int n)
 
 	end = jiffies + (HZ * 3);
 	while (dinfo->ring_space < n) {
-		dinfo->ring_head = (u8 __iomem *)(INREG(PRI_RING_HEAD) &
-						   RING_HEAD_MASK);
-		if (dinfo->ring_tail + RING_MIN_FREE <
-		    (u32 __iomem) dinfo->ring_head)
-			dinfo->ring_space = (u32 __iomem) dinfo->ring_head
+		dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
+		if (dinfo->ring_tail + RING_MIN_FREE < dinfo->ring_head)
+			dinfo->ring_space = dinfo->ring_head
 				- (dinfo->ring_tail + RING_MIN_FREE);
 		else
 			dinfo->ring_space = (dinfo->ring.size +
-					     (u32 __iomem) dinfo->ring_head)
+					     dinfo->ring_head)
 				- (dinfo->ring_tail + RING_MIN_FREE);
-		if ((u32 __iomem) dinfo->ring_head != last_head) {
+		if (dinfo->ring_head != last_head) {
 			end = jiffies + (HZ * 3);
-			last_head = (u32 __iomem) dinfo->ring_head;
+			last_head = dinfo->ring_head;
 		}
 		i++;
 		if (time_before(end, jiffies)) {
@@ -1495,15 +1493,13 @@ refresh_ring(struct intelfb_info *dinfo)
 	DBG_MSG("refresh_ring\n");
 #endif
 
-	dinfo->ring_head = (u8 __iomem *) (INREG(PRI_RING_HEAD) &
-					   RING_HEAD_MASK);
+	dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
 	dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
-	if (dinfo->ring_tail + RING_MIN_FREE < (u32 __iomem)dinfo->ring_head)
-		dinfo->ring_space = (u32 __iomem) dinfo->ring_head
+	if (dinfo->ring_tail + RING_MIN_FREE < dinfo->ring_head)
+		dinfo->ring_space = dinfo->ring_head
 			- (dinfo->ring_tail + RING_MIN_FREE);
 	else
-		dinfo->ring_space = (dinfo->ring.size +
-				     (u32 __iomem) dinfo->ring_head)
+		dinfo->ring_space = (dinfo->ring.size + dinfo->ring_head)
 			- (dinfo->ring_tail + RING_MIN_FREE);
 }