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nvme-pci: don't fall back to a 32-bit DMA mask 

Since Linux 5.0 drivers can safely set the largest DMA mask supported
by the device, and don't need fallbacks to work around the dma mapping
implementations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
Christoph Hellwig 2019-06-28 09:17:48 +02:00
parent 2177422232
commit 4fe06923f5
1 changed files with 1 additions and 2 deletions
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3
drivers/nvme/host/pci.c
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@ -2289,8 +2289,7 @@ static int nvme_pci_enable(struct nvme_dev *dev)
pci_set_master(pdev);
if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)) &&
dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(32)))
if (dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64)))
goto disable;
if (readl(dev->bar + NVME_REG_CSTS) == -1) {