4.20-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit cc667f6d5de023ee131e96bb88e5cddca23272bd ]
When using HMB the PCIe host driver allocates host_mem_desc_bufs using
dma_alloc_attrs() but frees them using dma_free_coherent(). Use the
correct dma_free_attrs() function to free the buffers.
Signed-off-by: Liviu Dudau <li...@dudau.co.uk>
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/nvme/host/pci.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index c33bb201b884..0f45868e8af9 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1748,8 +1748,9 @@ static void nvme_free_host_mem(struct nvme_dev *dev)
struct nvme_host_mem_buf_desc *desc = &dev->host_mem_descs[i];
size_t size = le32_to_cpu(desc->size) * dev->ctrl.page_size;
- dma_free_coherent(dev->dev, size, dev->host_mem_desc_bufs[i],
- le64_to_cpu(desc->addr));
+ dma_free_attrs(dev->dev, size, dev->host_mem_desc_bufs[i],
+ le64_to_cpu(desc->addr),
+ DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN);
}
kfree(dev->host_mem_desc_bufs);
@@ -1815,8 +1816,9 @@ static int __nvme_alloc_host_mem(struct nvme_dev *dev,
u64 preferred,
while (--i >= 0) {
size_t size = le32_to_cpu(descs[i].size) * dev->ctrl.page_size;
- dma_free_coherent(dev->dev, size, bufs[i],
- le64_to_cpu(descs[i].addr));
+ dma_free_attrs(dev->dev, size, bufs[i],
+ le64_to_cpu(descs[i].addr),
+ DMA_ATTR_NO_KERNEL_MAPPING | DMA_ATTR_NO_WARN);
}
kfree(bufs);
--
2.19.1
