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-rw-r--r--src/gallium/drivers/r600/r600_buffer.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/src/gallium/drivers/r600/r600_buffer.c b/src/gallium/drivers/r600/r600_buffer.c
index 0ca6ff114b4..857d860aaea 100644
--- a/src/gallium/drivers/r600/r600_buffer.c
+++ b/src/gallium/drivers/r600/r600_buffer.c
@@ -86,14 +86,13 @@ static void *r600_buffer_transfer_map(struct pipe_context *pipe,
struct r600_context *rctx = (struct r600_context*)pipe;
uint8_t *data;
- if (transfer->usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) {
- /* When mapping for read, we only need to check if the GPU is writing to it. */
- enum radeon_bo_usage rusage = transfer->usage & PIPE_TRANSFER_WRITE ?
- RADEON_USAGE_READWRITE : RADEON_USAGE_WRITE;
+ if (transfer->usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
+ !(transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
+ assert(transfer->usage & PIPE_TRANSFER_WRITE);
/* Check if mapping this buffer would cause waiting for the GPU. */
- if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, rusage) ||
- rctx->ws->buffer_is_busy(rbuffer->buf, rusage)) {
+ if (rctx->ws->cs_is_buffer_referenced(rctx->cs, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
+ rctx->ws->buffer_is_busy(rbuffer->buf, RADEON_USAGE_READWRITE)) {
unsigned i;
/* Discard the buffer. */