[Qemu-block] [PATCH] nvme: fix copy direction in DMA reads going to CMB

[Klaus Birkelund Jensen]

`nvme_dma_read_prp` erronously used `qemu_iovec_*to*_buf` instead of
`qemu_iovec_*from*_buf` when the request involved the controller memory
buffer.

Signed-off-by: Klaus Birkelund Jensen <address@hidden>
---
 hw/block/nvme.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 7caf92532a09..63a5b58849fb 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -238,7 +238,7 @@ static uint16_t nvme_dma_read_prp(NvmeCtrl *n, uint8_t 
*ptr, uint32_t len,
         }
         qemu_sglist_destroy(&qsg);
     } else {
-        if (unlikely(qemu_iovec_to_buf(&iov, 0, ptr, len) != len)) {
+        if (unlikely(qemu_iovec_from_buf(&iov, 0, ptr, len) != len)) {
             trace_nvme_err_invalid_dma();
             status = NVME_INVALID_FIELD | NVME_DNR;
         }
-- 
2.21.0