Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d08ca2...
Commit: d08ca26ceec4dfbcfdbada4ad728db742ccaecd1
Parent: 856b5925047d73a85557203d124d62c5eea1fbd3
Author: Steve Wise <swise@opengridcomputing.com>
AuthorDate: Mon Jan 21 14:42:11 2008 -0600
Committer: Roland Dreier <rolandd@cisco.com>
CommitDate: Fri Jan 25 14:17:45 2008 -0800
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 <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
drivers/infiniband/hw/cxgb3/iwch_mem.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb3/iwch_mem.c b/drivers/infiniband/hw/cxgb3/iwch_mem.c
index a6c2c4b..73bfd16 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)
-
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