nvme: avoid crashes when node 0 is memoryless node.

When CONFIG_NUMA is enabled and node 0 is memoryless, the system
crashes because nvme_probe() sets the device->numa_node to 0 by
set_dev_node(&pdev->dev, 0), so it tries to allocate memory from node 0.
To avoid the crash, we should change the 0 to first_memory_node.

Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 120f9b8..8083ae8 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1918,7 +1918,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
        node = dev_to_node(&pdev->dev);
        if (node == NUMA_NO_NODE)
-               set_dev_node(&pdev->dev, 0);
+               set_dev_node(&pdev->dev, first_memory_node);
 
        dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node);
        if (!dev)