[PATCH 2/4] hw/dma: Break the loop when loading descriptions fails

[Fea.Wang]

When calling the loading a description function, it should be noticed
that the function may return a failure value. Breaking the loop is one
of the possible ways to handle it.

Signed-off-by: Fea.Wang <fea.wang@sifive.com>
---
 hw/dma/xilinx_axidma.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
index 4b475e5484..b8ab5a423d 100644
--- a/hw/dma/xilinx_axidma.c
+++ b/hw/dma/xilinx_axidma.c
@@ -291,7 +291,9 @@ static void stream_process_mem2s(struct Stream *s, 
StreamSink *tx_data_dev,
     }
 
     while (1) {
-        stream_desc_load(s, s->regs[R_CURDESC]);
+        if (MEMTX_OK != stream_desc_load(s, s->regs[R_CURDESC])) {
+            break;
+        }
 
         if (s->desc.status & SDESC_STATUS_COMPLETE) {
             s->regs[R_DMASR] |= DMASR_HALTED;
@@ -348,7 +350,9 @@ static size_t stream_process_s2mem(struct Stream *s, 
unsigned char *buf,
     }
 
     while (len) {
-        stream_desc_load(s, s->regs[R_CURDESC]);
+        if (MEMTX_OK != stream_desc_load(s, s->regs[R_CURDESC])) {
+            break;
+        }
 
         if (s->desc.status & SDESC_STATUS_COMPLETE) {
             s->regs[R_DMASR] |= DMASR_HALTED;
-- 
2.34.1