This is a note to let you know that I've just added the patch titled
vdpa_sim: reset must not run
to the 6.8-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:
vdpa_sim-reset-must-not-run.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e6ce0be3dbd7b7829107baecaf483de076f1397f
Author: Steve Sistare <steven.sistare@xxxxxxxxxx>
Date: Fri Feb 9 14:30:07 2024 -0800
vdpa_sim: reset must not run
[ Upstream commit 9588e7fc511f9c55b9835f14916e90ab940061b7 ]
vdpasim_do_reset sets running to true, which is wrong, as it allows
vdpasim_kick_vq to post work requests before the device has been
configured. To fix, do not set running until VIRTIO_CONFIG_S_DRIVER_OK
is set.
Fixes: 0c89e2a3a9d0 ("vdpa_sim: Implement suspend vdpa op")
Signed-off-by: Steve Sistare <steven.sistare@xxxxxxxxxx>
Reviewed-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Message-Id: <1707517807-137331-1-git-send-email-steven.sistare@xxxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index be2925d0d2836..18584ce70bf07 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -160,7 +160,7 @@ static void vdpasim_do_reset(struct vdpasim *vdpasim, u32 flags)
}
}
- vdpasim->running = true;
+ vdpasim->running = false;
spin_unlock(&vdpasim->iommu_lock);
vdpasim->features = 0;
@@ -483,6 +483,7 @@ static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
mutex_lock(&vdpasim->mutex);
vdpasim->status = status;
+ vdpasim->running = (status & VIRTIO_CONFIG_S_DRIVER_OK) != 0;
mutex_unlock(&vdpasim->mutex);
}
