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NTB: Remove _addr functions from ntb_hw_amd 

Kernel zero day testing warned about address space confusion.  A virtual
iomem address was used where a physical address is expected.  The
offending functions implement an optional part of the api, so they are
removed.  They can be added later, after testing.

Fixes: a1b3695820

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Acked-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Allen Hubbe 2016-03-21 04:53:14 -04:00 committed by Jon Mason
parent afc5499229
commit 4f1b50c3e3
1 changed files with 0 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/ntb/hw/amd/ntb_hw_amd.c
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@ -357,20 +357,6 @@ static int amd_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits)
return 0;
}
static int amd_ntb_peer_db_addr(struct ntb_dev *ntb,
phys_addr_t *db_addr,
resource_size_t *db_size)
{
struct amd_ntb_dev *ndev = ntb_ndev(ntb);
if (db_addr)
*db_addr = (phys_addr_t)(ndev->peer_mmio + AMD_DBREQ_OFFSET);
if (db_size)
*db_size = sizeof(u32);
return 0;
}
static int amd_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
{
struct amd_ntb_dev *ndev = ntb_ndev(ntb);
@ -415,20 +401,6 @@ static int amd_ntb_spad_write(struct ntb_dev *ntb,
return 0;
}
static int amd_ntb_peer_spad_addr(struct ntb_dev *ntb, int idx,
phys_addr_t *spad_addr)
{
struct amd_ntb_dev *ndev = ntb_ndev(ntb);
if (idx < 0 || idx >= ndev->spad_count)
return -EINVAL;
if (spad_addr)
*spad_addr = (phys_addr_t)(ndev->self_mmio + AMD_SPAD_OFFSET +
ndev->peer_spad + (idx << 2));
return 0;
}
static u32 amd_ntb_peer_spad_read(struct ntb_dev *ntb, int idx)
{
struct amd_ntb_dev *ndev = ntb_ndev(ntb);
@ -472,12 +444,10 @@ static const struct ntb_dev_ops amd_ntb_ops = {
.db_clear = amd_ntb_db_clear,
.db_set_mask = amd_ntb_db_set_mask,
.db_clear_mask = amd_ntb_db_clear_mask,
.peer_db_addr = amd_ntb_peer_db_addr,
.peer_db_set = amd_ntb_peer_db_set,
.spad_count = amd_ntb_spad_count,
.spad_read = amd_ntb_spad_read,
.spad_write = amd_ntb_spad_write,
.peer_spad_addr = amd_ntb_peer_spad_addr,
.peer_spad_read = amd_ntb_peer_spad_read,
.peer_spad_write = amd_ntb_peer_spad_write,
};