[PATCH 1/2] hw/nvme/ctrl: Do not ignore DMA access errors

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

dma_buf_read/dma_buf_write() return a MemTxResult type.
Do not discard it, propagate the DMA error to the caller.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/nvme/ctrl.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index fa410a179a6..604ed0aea0d 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -1147,15 +1147,16 @@ static uint16_t nvme_tx(NvmeCtrl *n, NvmeSg *sg, uint8_t *ptr, uint32_t len,
 
     if (sg->flags & NVME_SG_DMA) {
         const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
+        MemTxResult res;
         uint64_t residual;
 
         if (dir == NVME_TX_DIRECTION_TO_DEVICE) {
-            dma_buf_write(ptr, len, &residual, &sg->qsg, attrs);
+            res = dma_buf_write(ptr, len, &residual, &sg->qsg, attrs);
         } else {
-            dma_buf_read(ptr, len, &residual, &sg->qsg, attrs);
+            res = dma_buf_read(ptr, len, &residual, &sg->qsg, attrs);
         }
 
-        if (unlikely(residual)) {
+        if (unlikely(residual) || res != MEMTX_OK) {
             trace_pci_nvme_err_invalid_dma();
             return NVME_INVALID_FIELD | NVME_DNR;
         }
-- 
2.33.1