diff options
| -rw-r--r-- | dma-helpers.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/dma-helpers.c b/dma-helpers.c index 96a120cf3c..1469e34df9 100644 --- a/dma-helpers.c +++ b/dma-helpers.c @@ -70,20 +70,26 @@ static void continue_after_map_failure(void *opaque) qemu_bh_schedule(dbs->bh); } -static void dma_bdrv_cb(void *opaque, int ret) +static void dma_bdrv_unmap(DMAAIOCB *dbs) { - DMAAIOCB *dbs = (DMAAIOCB *)opaque; - target_phys_addr_t cur_addr, cur_len; - void *mem; int i; - dbs->acb = NULL; - dbs->sector_num += dbs->iov.size / 512; for (i = 0; i < dbs->iov.niov; ++i) { cpu_physical_memory_unmap(dbs->iov.iov[i].iov_base, dbs->iov.iov[i].iov_len, !dbs->is_write, dbs->iov.iov[i].iov_len); } +} + +void dma_bdrv_cb(void *opaque, int ret) +{ + DMAAIOCB *dbs = (DMAAIOCB *)opaque; + target_phys_addr_t cur_addr, cur_len; + void *mem; + + dbs->acb = NULL; + dbs->sector_num += dbs->iov.size / 512; + dma_bdrv_unmap(dbs); qemu_iovec_reset(&dbs->iov); if (dbs->sg_cur_index == dbs->sg->nsg || ret < 0) { @@ -119,6 +125,11 @@ static void dma_bdrv_cb(void *opaque, int ret) dbs->acb = bdrv_aio_readv(dbs->bs, dbs->sector_num, &dbs->iov, dbs->iov.size / 512, dma_bdrv_cb, dbs); } + if (!dbs->acb) { + dma_bdrv_unmap(dbs); + qemu_iovec_destroy(&dbs->iov); + return; + } } static BlockDriverAIOCB *dma_bdrv_io( @@ -138,6 +149,10 @@ static BlockDriverAIOCB *dma_bdrv_io( dbs->bh = NULL; qemu_iovec_init(&dbs->iov, sg->nsg); dma_bdrv_cb(dbs, 0); + if (!dbs->acb) { + qemu_aio_release(dbs); + return NULL; + } return &dbs->common; } |