This is a note to let you know that I've just added the patch titled
drm/virtio: Set segment size for virtio_gpu device
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-virtio-set-segment-size-for-virtio_gpu-device.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9c64e749cebd9c2d3d55261530a98bcccb83b950 Mon Sep 17 00:00:00 2001
From: Sebastian Ott <sebott@xxxxxxxxxx>
Date: Tue, 23 Jan 2024 19:14:14 +0100
Subject: drm/virtio: Set segment size for virtio_gpu device
From: Sebastian Ott <sebott@xxxxxxxxxx>
commit 9c64e749cebd9c2d3d55261530a98bcccb83b950 upstream.
Set the segment size of the virtio_gpu device to the value
used by the drm helpers when allocating sg lists to fix the
following complaint from DMA_API debug code:
DMA-API: virtio-pci 0000:07:00.0: mapping sg segment longer than
device claims to support [len=262144] [max=65536]
Cc: stable@xxxxxxxxxxxxxxx
Tested-by: Zhenyu Zhang <zhenyzha@xxxxxxxxxx>
Acked-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Signed-off-by: Sebastian Ott <sebott@xxxxxxxxxx>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/7258a4cc-da16-5c34-a042-2a23ee396d56@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/virtio/virtgpu_drv.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -94,6 +94,7 @@ static int virtio_gpu_probe(struct virti
goto err_free;
}
+ dma_set_max_seg_size(dev->dev, dma_max_mapping_size(dev->dev) ?: UINT_MAX);
ret = virtio_gpu_init(vdev, dev);
if (ret)
goto err_free;
Patches currently in stable-queue which might be from sebott@xxxxxxxxxx are
queue-6.6/drm-virtio-set-segment-size-for-virtio_gpu-device.patch
