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From 29e3a6aebf124a88b26fd49a2dd0a99c38f918aa Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Thu, 4 Jul 2019 10:32:07 +0200
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Subject: [PATCH 4/4] virtio-gpu: fix unmap in error path
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: <20190704103207.29158-4-kraxel@redhat.com>
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Patchwork-id: 89373
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O-Subject: [RHEL-8.1.0 qemu-kvm PATCH v2 3/3] virtio-gpu: fix unmap in error path
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Bugzilla: 1531543
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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We land here in case not everything we've asked for could be mapped.
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So unmap only the bytes which have actually been mapped.
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Also we didn't access anything, so acces_len can be 0.
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Reported-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Li Qiang <liq3ea@gmail.com>
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Message-id: 20190628072357.31782-1-kraxel@redhat.com
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(cherry picked from commit a7f85e03b94ffaca75332cddf06426fc85ac611a)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/display/virtio-gpu.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
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index 327c2be..07712d0 100644
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--- a/hw/display/virtio-gpu.c
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+++ b/hw/display/virtio-gpu.c
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@@ -1158,9 +1158,9 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
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if (res->iov[i].iov_base) {
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dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
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res->iov[i].iov_base,
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- res->iov[i].iov_len,
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+ len,
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DMA_DIRECTION_TO_DEVICE,
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- res->iov[i].iov_len);
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+ 0);
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}
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/* ...and the mappings for previous loop iterations */
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res->iov_cnt = i;
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--
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1.8.3.1
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