From b3da551389c86ce214d5418c174134c3e1c838ab Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Fri, 16 Mar 2018 10:51:30 +0100 Subject: [PATCH] fdc: Exit if ISA controller does not support DMA A "powernv" machine type defines an ISA bus but it does not add any DMA controller to it so it is possible to hit assert(fdctrl->dma) by adding "-machine powernv -device isa-fdc". This replaces assert() with an error message. Signed-off-by: Alexey Kardashevskiy [thuth: Slightly adjusted error message and updated scripts/device-crash-test] Signed-off-by: Thomas Huth Message-Id: <1521193892-15552-3-git-send-email-thuth@redhat.com> Signed-off-by: Paolo Bonzini --- hw/block/fdc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/block/fdc.c b/hw/block/fdc.c index 7b7dd41296..cd29e27d8f 100644 --- a/hw/block/fdc.c +++ b/hw/block/fdc.c @@ -2695,7 +2695,10 @@ static void isabus_fdc_realize(DeviceState *dev, Error **errp) fdctrl->dma_chann = isa->dma; if (fdctrl->dma_chann != -1) { fdctrl->dma = isa_get_dma(isa_bus_from_device(isadev), isa->dma); - assert(fdctrl->dma); + if (!fdctrl->dma) { + error_setg(errp, "ISA controller does not support DMA"); + return; + } } qdev_set_legacy_instance_id(dev, isa->iobase, 2);