From: Felix Kuehling Date: Tue, 15 Aug 2017 23:00:11 -0400 Subject: drm/amdkfd: Allocate gtt_sa_bitmap in long units Git-commit: 8625ff9c0ba7db32ce4eb25f6032638c1f88c82f Patch-mainline: v4.14-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 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 Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/amdkfd/kfd_device.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- 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 *k 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_de 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;