* [PATCH] nvme: return -EOPNOTSUPP for unsupported dma-buf I/O
@ 2026-10-30 12:03 Anuj Gupta
2026-11-03 5:37 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Anuj Gupta @ 2026-10-30 12:03 UTC (permalink / raw)
To: axboe, hch, asml.silence, kbusch; +Cc: linux-nvme, anuj20.g
From: Anuj Gupta <anuj20.g@samsung.com>
dma_buf_io_ctx_create() uses -EOPNOTSUPP when a file cannot create a
dma-buf I/O context. NVMe currently returns -EINVAL when the namespace's
transport does not implement ->init_dma_buf_io_ctx, making fabrics
namespaces report an invalid argument for an unsupported operation.
Return -EOPNOTSUPP instead.
Fixes: ce5e386c1108 ("nvme-pci: implement dma-buf backed requests")
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
---
drivers/nvme/host/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a7a4d09644c1..54d4888cdcd1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2720,7 +2720,7 @@ static int nvme_init_dma_buf_io_ctx(struct block_device *bdev,
struct nvme_ctrl *ctrl = ns->ctrl;
if (!ctrl->ops->init_dma_buf_io_ctx)
- return -EINVAL;
+ return -EOPNOTSUPP;
return ctrl->ops->init_dma_buf_io_ctx(ctrl, ctx);
}
base-commit: 70866cfa169d5ee149364267289e71d50f9a7ae9
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] nvme: return -EOPNOTSUPP for unsupported dma-buf I/O
2026-10-30 12:03 [PATCH] nvme: return -EOPNOTSUPP for unsupported dma-buf I/O Anuj Gupta
@ 2026-11-03 5:37 ` Christoph Hellwig
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2026-11-03 5:37 UTC (permalink / raw)
To: Anuj Gupta; +Cc: axboe, hch, asml.silence, kbusch, linux-nvme, anuj20.g
Looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
^ permalink raw reply [flat|nested] 2+ messages in thread
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