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NVMe: fail pci initialization if the device doesn't have any BARs

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The PCI init of NVMe doesn't check for valid bars before proceeding
to map and use BAR 0. If the device is hosed (or firmware is), then
we should catch this case and give up early.

This fixes a:

[ 1662.035778] WARNING: CPU: 0 PID: 4 at arch/x86/mm/ioremap.c:63 __ioremap_check_ram+0xa7/0xc0()

and later badness on such a device.

Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe
2014-11-14 09:50:19 -07:00
parent 2c30540b38
commit be7837e89d
1 changed files with 3 additions and 0 deletions
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drivers/block/nvme-core.c
+3
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@@ -2156,6 +2156,9 @@ static int nvme_dev_map(struct nvme_dev *dev)
dev->entry[0].vector = pdev->irq;
pci_set_master(pdev);
bars = pci_select_bars(pdev, IORESOURCE_MEM);
if (!bars)
goto disable_pci;
if (pci_request_selected_regions(pdev, bars, "nvme"))
goto disable_pci;