[PATCH 3/5] nvme-pci: iod npages fits in s8

[Keith Busch <kbusch@fb.com>]

From: Keith Busch <kbusch@kernel.org>

The largest allowed transfer is 4MB, which can use at most 1025 PRPs.
Each PRP is 8 bytes, so the maximum number of 4k nvme pages needed for
the iod_list is 3, which fits in an 's8'.

Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 drivers/nvme/host/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index a8ae043e33de..9e5bbf4e3e07 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -228,7 +228,7 @@ struct nvme_iod {
 	struct nvme_command cmd;
 	bool use_sgl;
 	bool aborted;
-	int npages;		/* In the PRP list. 0 means small pool in use */
+	s8 npages;		/* In the PRP list. 0 means small pool in use */
 	int nents;		/* Used in scatterlist */
 	dma_addr_t first_dma;
 	unsigned int dma_len;	/* length of single DMA segment mapping */
-- 
2.30.2