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| author | Sasha Levin <sasha.levin@oracle.com> | 2014-12-03 15:26:25 +0100 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@amd.com> | 2014-12-03 15:26:25 +0100 |
| commit | aeda036c371c58d3a6dcb3e5ac3c1503e7ffc4cf (patch) | |
| tree | 3db5a04dbed1edae44c3375c1a06c8717c6b381c /drivers | |
| parent | Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux int... (diff) | |
| download | linux-aeda036c371c58d3a6dcb3e5ac3c1503e7ffc4cf.tar.xz linux-aeda036c371c58d3a6dcb3e5ac3c1503e7ffc4cf.zip | |
amdkfd: use sizeof(long) granularity for the pasid bitmask
All the bit operations (such as find_first_zero_bit()) read sizeof(long) bytes
at a time. If we allocated less than sizeof(long) bytes for the bitmask we
would be accessing invalid memory when working with the bitmask.
Change the allocator to allocate sizeof(long) multiples for the bitmask.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_pasid.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c index 2458ab7c0c6e..71699ad97d74 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_pasid.c @@ -32,8 +32,7 @@ int kfd_pasid_init(void) { pasid_limit = max_num_of_processes; - pasid_bitmap = kzalloc(DIV_ROUND_UP(pasid_limit, BITS_PER_BYTE), - GFP_KERNEL); + pasid_bitmap = kzalloc(BITS_TO_LONGS(pasid_limit), GFP_KERNEL); if (!pasid_bitmap) return -ENOMEM; |