drm/amdkfd: Allocate gtt_sa_bitmap in long units

gtt_sa_bitmap is accessed by bitmap functions, which operate on longs.
Therefore the array should be allocated in long units. Also round up
in case the number of bits is not a multiple of BITS_PER_LONG.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index cb7ed02..416955f 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -395,7 +395,7 @@ void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
 static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
                                unsigned int chunk_size)
 {
-       unsigned int num_of_bits;
+       unsigned int num_of_longs;
 
        BUG_ON(buf_size < chunk_size);
        BUG_ON(buf_size == 0);
@@ -404,10 +404,10 @@ static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
        kfd->gtt_sa_chunk_size = chunk_size;
        kfd->gtt_sa_num_of_chunks = buf_size / chunk_size;
 
-       num_of_bits = kfd->gtt_sa_num_of_chunks / BITS_PER_BYTE;
-       BUG_ON(num_of_bits == 0);
+       num_of_longs = (kfd->gtt_sa_num_of_chunks + BITS_PER_LONG - 1) /
+               BITS_PER_LONG;
 
-       kfd->gtt_sa_bitmap = kzalloc(num_of_bits, GFP_KERNEL);
+       kfd->gtt_sa_bitmap = kcalloc(num_of_longs, sizeof(long), GFP_KERNEL);
 
        if (!kfd->gtt_sa_bitmap)
                return -ENOMEM;