From 9cf70c52253ccadc137d40eb0de2c0f25a127334 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 15 Mar 2016 19:34:31 +0100 Subject: [PATCH] ivshmem: Fix harmless misuse of Error MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We reuse errp after passing it host_memory_backend_get_memory(). If both host_memory_backend_get_memory() and the reuse set an error, the reuse will fail the assertion in error_setv(). Fortunately, host_memory_backend_get_memory() can't fail. Pass it &error_abort to make our assumption explicit, and to get the assertion failure in the right place should it become invalid. Signed-off-by: Markus Armbruster Reviewed-by: Marc-André Lureau Message-Id: <1458066895-20632-17-git-send-email-armbru@redhat.com> --- hw/misc/ivshmem.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index 0ac0238c7f..299cf5bda2 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -842,7 +842,7 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp) g_warning("size argument ignored with hostmem"); } - mr = host_memory_backend_get_memory(s->hostmem, errp); + mr = host_memory_backend_get_memory(s->hostmem, &error_abort); s->ivshmem_size = memory_region_size(mr); } else if (s->sizearg == NULL) { s->ivshmem_size = 4 << 20; /* 4 MB default */ @@ -907,7 +907,8 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp) IVSHMEM_DPRINTF("using hostmem\n"); - mr = host_memory_backend_get_memory(MEMORY_BACKEND(s->hostmem), errp); + mr = host_memory_backend_get_memory(MEMORY_BACKEND(s->hostmem), + &error_abort); vmstate_register_ram(mr, DEVICE(s)); memory_region_add_subregion(&s->bar, 0, mr); pci_register_bar(PCI_DEVICE(s), 2, attr, &s->bar); @@ -1134,7 +1135,7 @@ static void ivshmem_check_memdev_is_busy(Object *obj, const char *name, { MemoryRegion *mr; - mr = host_memory_backend_get_memory(MEMORY_BACKEND(val), errp); + mr = host_memory_backend_get_memory(MEMORY_BACKEND(val), &error_abort); if (memory_region_is_mapped(mr)) { char *path = object_get_canonical_path_component(val); error_setg(errp, "can't use already busy memdev: %s", path);