linux-kernel - Re: [PATCH] virtio-mmio: Correct the name of the guest features selector

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Date:	Tue, 15 Nov 2011 14:25:22 +0000
From:	Pawel Moll <pawel.moll@....com>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH] virtio-mmio: Correct the name of the guest features
 selector

On Tue, 2011-11-15 at 14:17 +0000, Sasha Levin wrote:
> Guest features selector spelling mistake.
>
> diff --git a/include/linux/virtio_mmio.h b/include/linux/virtio_mmio.h
> index 27c7ede..5c7b6f0 100644
> --- a/include/linux/virtio_mmio.h
> +++ b/include/linux/virtio_mmio.h
> @@ -63,7 +63,7 @@
>  #define VIRTIO_MMIO_GUEST_FEATURES	0x020
>  
>  /* Activated features set selector - Write Only */
> -#define VIRTIO_MMIO_GUEST_FEATURES_SET	0x024
> +#define VIRTIO_MMIO_GUEST_FEATURES_SEL	0x024
>  
>  /* Guest's memory page size in bytes - Write Only */
>  #define VIRTIO_MMIO_GUEST_PAGE_SIZE	0x028

Damn. Sorry about it. But if you change the header you'll need to change
the driver:

diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 1f25bb9..10bb8b9 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -161,7 +161,7 @@ static void vm_finalize_features(struct virtio_device *vdev)
        vring_transport_features(vdev);
 
        for (i = 0; i < ARRAY_SIZE(vdev->features); i++) {
-               writel(i, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SET);
+               writel(i, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
                writel(vdev->features[i],
                                vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
        }

Cheers!

Paweł


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