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Differential D50909

virtio_blk: Limit use of indirect descriptors
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Authored by andrew on Jun 17 2025, 3:18 PM.
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Reviewers
bryanv
harry.moulton_arm.com
Commits
rGcbc2e34613c4: virtio_blk: Limit use of indirect descriptors
Summary

Pass 0 as the number of indirect descriptors when they are not
supported.

This fixes an issue on the Arm FVP model where we don't negotiate
them, however pass a number of segments greater than
VIRTIO_MAX_INDIRECT. This leads to virtqueue_alloc failing and
virtio_blk failing to attach.

Sponsored by: Arm Ltd

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Repository
rG FreeBSD src repository
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Build Status
Buildable 64944
Build 61827: arc lint + arc unit

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PathSize
sys/
dev/
virtio/
block/
6 lines

Diff 157184

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sys/dev/virtio/block/virtio_blk.c

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