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authorSasha Levin <sasha.levin@oracle.com>2014-12-03 09:26:25 -0500
committerOded Gabbay <oded.gabbay@amd.com>2014-12-03 09:26:25 -0500
commitaeda036c371c58d3a6dcb3e5ac3c1503e7ffc4cf (patch)
tree3db5a04dbed1edae44c3375c1a06c8717c6b381c /drivers/gpu/drm/amd
parentd5b75dc01fa9c699aee5f82f5dbe508da438ff94 (diff)
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/gpu/drm/amd')
-rw-r--r--drivers/gpu/drm/amd/amdkfd/kfd_pasid.c3
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;