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QNX: W/A for virtio-input over shmem #46

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merged 1 commit into from
Oct 9, 2024
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QNX: W/A for virtio-input over shmem #46

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7 changes: 6 additions & 1 deletion drivers/virtio/virtio_shmem.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
#include <linux/virtio_ids.h>
#include <linux/virtio_pci.h>
#include <linux/guest_shm.h>
#include <asm/hypervisor.h>

#include "virtio_shmem.h"

Expand Down Expand Up @@ -94,7 +95,11 @@ static bool vi_reg_write(struct virtio_shmem_device *vi_dev, unsigned int reg,
virt_wmb();

vi_dev->notify_peer(vi_dev, 0);

/* delay a short time for BE to update config space */
if (vi_dev->vdev.id.device == VIRTIO_ID_INPUT &&
hypervisor_is_type(X86_HYPER_QNX)) {
mdelay(1);
}
return true;
}

Expand Down