diff options
author | Marc Zyngier <marc.zyngier@arm.com> | 2017-11-02 15:53:54 +0000 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-11-02 15:54:58 +0000 |
commit | 05f3647359f8bf44e000122cee6a848f5129e2e3 (patch) | |
tree | 072631bead382da3152ffa5b7c5767f683ddca16 /drivers/infiniband/hw/mlx5/mem.c | |
parent | 7bdeb7f52b1b193bb50fc6d01c6110ba50bafb5b (diff) | |
parent | 9e66317d3c92ddaab330c125dfe9d06eee268aff (diff) |
Merge tag 'v4.14-rc3' into irq/irqchip-4.15
Required merge to get mainline irqchip updates.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mem.c')
-rw-r--r-- | drivers/infiniband/hw/mlx5/mem.c | 47 |
1 files changed, 17 insertions, 30 deletions
diff --git a/drivers/infiniband/hw/mlx5/mem.c b/drivers/infiniband/hw/mlx5/mem.c index 914f212e7ef6..f3dbd75a0a96 100644 --- a/drivers/infiniband/hw/mlx5/mem.c +++ b/drivers/infiniband/hw/mlx5/mem.c @@ -50,13 +50,9 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, { unsigned long tmp; unsigned long m; - int i, k; - u64 base = 0; - int p = 0; - int skip; - int mask; - u64 len; - u64 pfn; + u64 base = ~0, p = 0; + u64 len, pfn; + int i = 0; struct scatterlist *sg; int entry; unsigned long page_shift = umem->page_shift; @@ -76,33 +72,24 @@ void mlx5_ib_cont_pages(struct ib_umem *umem, u64 addr, m = find_first_bit(&tmp, BITS_PER_LONG); if (max_page_shift) m = min_t(unsigned long, max_page_shift - page_shift, m); - skip = 1 << m; - mask = skip - 1; - i = 0; + for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) { len = sg_dma_len(sg) >> page_shift; pfn = sg_dma_address(sg) >> page_shift; - for (k = 0; k < len; k++) { - if (!(i & mask)) { - tmp = (unsigned long)pfn; - m = min_t(unsigned long, m, find_first_bit(&tmp, BITS_PER_LONG)); - skip = 1 << m; - mask = skip - 1; - base = pfn; - p = 0; - } else { - if (base + p != pfn) { - tmp = (unsigned long)p; - m = find_first_bit(&tmp, BITS_PER_LONG); - skip = 1 << m; - mask = skip - 1; - base = pfn; - p = 0; - } - } - p++; - i++; + if (base + p != pfn) { + /* If either the offset or the new + * base are unaligned update m + */ + tmp = (unsigned long)(pfn | p); + if (!IS_ALIGNED(tmp, 1 << m)) + m = find_first_bit(&tmp, BITS_PER_LONG); + + base = pfn; + p = 0; } + + p += len; + i += len; } if (i) { |