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authorRussell King (Oracle)2022-10-12 12:46:06 +0100
committerChristoph Hellwig2022-10-19 10:36:39 +0200
commitd622f8477a8018974f8df961440dca58224f9c6b (patch)
tree463ce10fcf03e774d9395b66f60c09ab98bcf7db /drivers/nvme
parentac9b57d4e1e3ecf0122e915bbba1bd4c90ec3031 (diff)
nvme-apple: don't limit DMA segement size
NVMe uses PRPs for data transfers and has no specific limit for a single DMA segement. Limiting the size will cause problems because the block layer assumes PRP-ish devices using a virt boundary mask don't have a segment limit. And while this is true, we also really need to tell the DMA mapping layer about it, otherwise dma-debug will trip over it. Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver") Suggested-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [hch: rewrote the commit message based on the PCIe commit] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Curtin <ecurtin@redhat.com> Reviewed-by: Sven Peter <sven@svenpeter.dev>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/apple.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvme/host/apple.c b/drivers/nvme/host/apple.c
index 5fc5ea196b40..ff8b083dc5c6 100644
--- a/drivers/nvme/host/apple.c
+++ b/drivers/nvme/host/apple.c
@@ -1039,6 +1039,8 @@ static void apple_nvme_reset_work(struct work_struct *work)
dma_max_mapping_size(anv->dev) >> 9);
anv->ctrl.max_segments = NVME_MAX_SEGS;
+ dma_set_max_seg_size(anv->dev, 0xffffffff);
+
/*
* Enable NVMMU and linear submission queues.
* While we could keep those disabled and pretend this is slightly