From: Steve Wise Date: Mon, 21 Jan 2008 20:42:11 +0000 (-0600) Subject: RDMA/cxgb3: Fix page shift calculation in build_phys_page_list() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d08ca26ceec4dfbcfdbada4ad728db742ccaecd1;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git RDMA/cxgb3: Fix page shift calculation in build_phys_page_list() The existing logic incorrectly maps this buffer list: 0: addr 0x10001000, size 0x1000 1: addr 0x10002000, size 0x1000 To this bogus page list: 0: 0x10000000 1: 0x10002000 The shift calculation must also take into account the address of the first entry masked by the page_mask as well as the last address+size rounded up to the next page size. Signed-off-by: Steve Wise Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/cxgb3/iwch_mem.c b/drivers/infiniband/hw/cxgb3/iwch_mem.c index a6c2c4ba29e6..73bfd1656f86 100644 --- a/drivers/infiniband/hw/cxgb3/iwch_mem.c +++ b/drivers/infiniband/hw/cxgb3/iwch_mem.c @@ -122,6 +122,13 @@ int build_phys_page_list(struct ib_phys_buf *buffer_list, *total_size += buffer_list[i].size; if (i > 0) mask |= buffer_list[i].addr; + else + mask |= buffer_list[i].addr & PAGE_MASK; + if (i != num_phys_buf - 1) + mask |= buffer_list[i].addr + buffer_list[i].size; + else + mask |= (buffer_list[i].addr + buffer_list[i].size + + PAGE_SIZE - 1) & PAGE_MASK; } if (*total_size > 0xFFFFFFFFULL)