staging: unisys: Eliminate visor_memregion_create()

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchannel.c

@@ -57,9 +57,8 @@ visorchannel_create_guts(HOSTADDRESS physaddr, ulong channel_bytes,
 	struct visorchannel *channel;
 	int err;
 	size_t size = sizeof(struct channel_header);
-	struct memregion *memregion;
 
-	channel = kmalloc(sizeof(*channel), GFP_KERNEL|__GFP_NORETRY);
+	channel = kzalloc(sizeof(*channel), GFP_KERNEL|__GFP_NORETRY);
 	if (!channel)
 		goto cleanup;
 
@@ -67,11 +66,17 @@ visorchannel_create_guts(HOSTADDRESS physaddr, ulong channel_bytes,
 	spin_lock_init(&channel->insert_lock);
 	spin_lock_init(&channel->remove_lock);
 
-	/* prepare chan_hdr (abstraction to read/write channel memory) */
-	memregion = visor_memregion_create(&channel->memregion, physaddr, size);
+	if (!request_mem_region(physaddr, size, MYDRVNAME))
+		goto cleanup;
 
-	if (!memregion)
+	channel->memregion.mapped = ioremap_cache(physaddr, size);
+	if (!channel->memregion.mapped) {
+		release_mem_region(physaddr, size);
 		goto cleanup;
+	}
+
+	channel->memregion.physaddr = physaddr;
+	channel->memregion.nbytes = size;
 
 	err = visor_memregion_read(&channel->memregion, 0, &channel->chan_hdr,
 				   sizeof(struct channel_header));

drivers/staging/unisys/visorutil/memregion.h

@@ -29,8 +29,6 @@ struct memregion {
 	void __iomem *mapped;
 };
 
-struct memregion *visor_memregion_create(struct memregion *memregion,
-					 HOSTADDRESS physaddr, ulong nbytes);
 int visor_memregion_resize(struct memregion *memregion, ulong newsize);
 int visor_memregion_read(struct memregion *memregion,
 			 ulong offset, void *dest, ulong nbytes);

drivers/staging/unisys/visorutil/memregion_direct.c

@@ -28,28 +28,6 @@
 static int mapit(struct memregion *memregion);
 static void unmapit(struct memregion *memregion);
 
-struct memregion *
-visor_memregion_create(struct memregion *memregion,
-		       HOSTADDRESS physaddr, ulong nbytes)
-{
-	struct memregion *rc = NULL;
-
-	memregion->physaddr = physaddr;
-	memregion->nbytes = nbytes;
-	if (mapit(memregion)) {
-		rc = NULL;
-		goto cleanup;
-	}
-	rc = memregion;
-cleanup:
-	if (rc == NULL) {
-		visor_memregion_destroy(memregion);
-		memregion = NULL;
-	}
-	return rc;
-}
-EXPORT_SYMBOL_GPL(visor_memregion_create);
-
 static int
 mapit(struct memregion *memregion)
 {