X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=drivers%2Fvirtio%2Fvirtio_mem.c;h=dee46865bae2b0cbccad96e68af7faa022c916f8;hb=347202dc04a110bdab8d4e1c38ceccd7758fe13e;hp=181e2f18beae5b3603c9c239dd9e589767078ae2;hpb=672f8871261597894d46454b8fa1660d6c952af6;p=linux-2.6-microblaze.git

diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 181e2f18beae..dee46865bae2 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -70,7 +70,7 @@ struct virtio_mem {
 
 	/* The device block size (for communicating with the device). */
 	uint64_t device_block_size;
-	/* The translated node id. NUMA_NO_NODE in case not specified. */
+	/* The determined node id for all memory of the device. */
 	int nid;
 	/* Physical start address of the memory region. */
 	uint64_t addr;
@@ -257,10 +257,8 @@ static enum virtio_mem_mb_state virtio_mem_mb_get_state(struct virtio_mem *vm,
  */
 static int virtio_mem_mb_state_prepare_next_mb(struct virtio_mem *vm)
 {
-	unsigned long old_bytes = vm->next_mb_id - vm->first_mb_id + 1;
-	unsigned long new_bytes = vm->next_mb_id - vm->first_mb_id + 2;
-	int old_pages = PFN_UP(old_bytes);
-	int new_pages = PFN_UP(new_bytes);
+	int old_pages = PFN_UP(vm->next_mb_id - vm->first_mb_id);
+	int new_pages = PFN_UP(vm->next_mb_id - vm->first_mb_id + 1);
 	uint8_t *new_mb_state;
 
 	if (vm->mb_state && old_pages == new_pages)
@@ -406,10 +404,6 @@ static int virtio_mem_sb_bitmap_prepare_next_mb(struct virtio_mem *vm)
 static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
 {
 	const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
-	int nid = vm->nid;
-
-	if (nid == NUMA_NO_NODE)
-		nid = memory_add_physaddr_to_nid(addr);
 
 	/*
 	 * When force-unloading the driver and we still have memory added to
@@ -423,7 +417,8 @@ static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
 	}
 
 	dev_dbg(&vm->vdev->dev, "adding memory block: %lu\n", mb_id);
-	return add_memory_driver_managed(nid, addr, memory_block_size_bytes(),
+	return add_memory_driver_managed(vm->nid, addr,
+					 memory_block_size_bytes(),
 					 vm->resource_name,
 					 MEMHP_MERGE_RESOURCE);
 }
@@ -440,13 +435,9 @@ static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
 static int virtio_mem_mb_remove(struct virtio_mem *vm, unsigned long mb_id)
 {
 	const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
-	int nid = vm->nid;
-
-	if (nid == NUMA_NO_NODE)
-		nid = memory_add_physaddr_to_nid(addr);
 
 	dev_dbg(&vm->vdev->dev, "removing memory block: %lu\n", mb_id);
-	return remove_memory(nid, addr, memory_block_size_bytes());
+	return remove_memory(vm->nid, addr, memory_block_size_bytes());
 }
 
 /*
@@ -461,14 +452,11 @@ static int virtio_mem_mb_offline_and_remove(struct virtio_mem *vm,
 					    unsigned long mb_id)
 {
 	const uint64_t addr = virtio_mem_mb_id_to_phys(mb_id);
-	int nid = vm->nid;
-
-	if (nid == NUMA_NO_NODE)
-		nid = memory_add_physaddr_to_nid(addr);
 
 	dev_dbg(&vm->vdev->dev, "offlining and removing memory block: %lu\n",
 		mb_id);
-	return offline_and_remove_memory(nid, addr, memory_block_size_bytes());
+	return offline_and_remove_memory(vm->nid, addr,
+					 memory_block_size_bytes());
 }
 
 /*
@@ -1659,6 +1647,10 @@ static int virtio_mem_init(struct virtio_mem *vm)
 	virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size,
 			&vm->region_size);
 
+	/* Determine the nid for the device based on the lowest address. */
+	if (vm->nid == NUMA_NO_NODE)
+		vm->nid = memory_add_physaddr_to_nid(vm->addr);
+
 	/*
 	 * We always hotplug memory in memory block granularity. This way,
 	 * we have to wait for exactly one memory block to online.
@@ -1707,7 +1699,7 @@ static int virtio_mem_init(struct virtio_mem *vm)
 		 memory_block_size_bytes());
 	dev_info(&vm->vdev->dev, "subblock size: 0x%llx",
 		 (unsigned long long)vm->subblock_size);
-	if (vm->nid != NUMA_NO_NODE)
+	if (vm->nid != NUMA_NO_NODE && IS_ENABLED(CONFIG_NUMA))
 		dev_info(&vm->vdev->dev, "nid: %d", vm->nid);
 
 	return 0;