The queue buffer index starts from position 0, so the available buffer size which starts from position 0 to rptr should be "rptr" index value. While the packet_size_in_dwords == rptr, the available buffer is just good enough.
Signed-off-by: Huang Rui <[email protected]> --- drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c index bae7064..4667c8f 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c @@ -263,7 +263,7 @@ int kq_acquire_packet_buffer(struct kernel_queue *kq, /* make sure after rolling back to position 0, there is * still enough space. */ - if (packet_size_in_dwords >= rptr) + if (packet_size_in_dwords > rptr) goto err_no_space; /* fill nops, roll back and start at position 0 */ -- 2.7.4 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
