Blame SOURCES/0020-net-virtio-fix-calculation-of-device_event-ptr.patch
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From f2e20b51ac6432390ea545e2b6247419dfcaab40 Mon Sep 17 00:00:00 2001
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From: Jens Freimann <jfreimann@redhat.com>
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Date: Mon, 16 Sep 2019 17:26:16 +0200
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Subject: [PATCH] net/virtio: fix calculation of device_event ptr
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Fix wrong pointer arithmetic. We only need to increment by 1 if we want
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to advance it by the size of the driver event area.
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Signed-off-by: Jens Freimann <jfreimann@redhat.com>
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---
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drivers/net/virtio/virtio_ring.h | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/drivers/net/virtio/virtio_ring.h b/drivers/net/virtio/virtio_ring.h
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index 1760823c6..fdc62194e 100644
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--- a/drivers/net/virtio/virtio_ring.h
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+++ b/drivers/net/virtio/virtio_ring.h
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@@ -165,8 +165,7 @@ vring_init_packed(struct vring_packed *vr, uint8_t *p, unsigned long align,
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vr->driver_event = (struct vring_packed_desc_event *)(p +
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vr->num * sizeof(struct vring_packed_desc));
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vr->device_event = (struct vring_packed_desc_event *)
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- RTE_ALIGN_CEIL((uintptr_t)(vr->driver_event +
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- sizeof(struct vring_packed_desc_event)), align);
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+ RTE_ALIGN_CEIL((uintptr_t)(vr->driver_event + 1), align);
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}
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/*
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--
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2.21.0
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