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nvme-pci: fix page size checks 

[ Upstream commit 841734234a ]

The size allocated out of the dma pool is at most NVME_CTRL_PAGE_SIZE,
which may be smaller than the PAGE_SIZE.

Fixes: c61b82c7b7 ("nvme-pci: fix PRP pool size")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Keith Busch 2022-12-19 13:54:55 -08:00 committed by Greg Kroah-Hartman
parent e1777b4286
commit e255206af0
1 changed files with 4 additions and 4 deletions
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8
drivers/nvme/host/pci.c
View File

@ -35,7 +35,7 @@
#define SQ_SIZE(q) ((q)->q_depth << (q)->sqes)
#define CQ_SIZE(q) ((q)->q_depth * sizeof(struct nvme_completion))
#define SGES_PER_PAGE (PAGE_SIZE / sizeof(struct nvme_sgl_desc))
#define SGES_PER_PAGE (NVME_CTRL_PAGE_SIZE / sizeof(struct nvme_sgl_desc))
/*
* These can be higher, but we need to ensure that any command doesn't
@ -380,7 +380,7 @@ static int nvme_pci_npages_prp(void)
{
unsigned max_bytes = (NVME_MAX_KB_SZ * 1024) + NVME_CTRL_PAGE_SIZE;
unsigned nprps = DIV_ROUND_UP(max_bytes, NVME_CTRL_PAGE_SIZE);
return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8);
return DIV_ROUND_UP(8 * nprps, NVME_CTRL_PAGE_SIZE - 8);
}
/*
@ -390,7 +390,7 @@ static int nvme_pci_npages_prp(void)
static int nvme_pci_npages_sgl(void)
{
return DIV_ROUND_UP(NVME_MAX_SEGS * sizeof(struct nvme_sgl_desc),
PAGE_SIZE);
NVME_CTRL_PAGE_SIZE);
}
static size_t nvme_pci_iod_alloc_size(void)
@ -721,7 +721,7 @@ static void nvme_pci_sgl_set_seg(struct nvme_sgl_desc *sge,
sge->length = cpu_to_le32(entries * sizeof(*sge));
sge->type = NVME_SGL_FMT_LAST_SEG_DESC << 4;
} else {
sge->length = cpu_to_le32(PAGE_SIZE);
sge->length = cpu_to_le32(NVME_CTRL_PAGE_SIZE);
sge->type = NVME_SGL_FMT_SEG_DESC << 4;
}
}