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...num" from a register so it's not really possible to tell what value it holds with static analysis. Let's just silence the warning. Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5c802d4..ca6bfdd 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1006,7 +1006,7 @@ struct virtqueue *vring_create_virtqueue( const char *name) { struct virtqueue *vq; - void *queue; + void *queue = NULL; dma_addr_t dma_addr; size_t queue_size_in_bytes; struct vring vring;

...2d1382fe9d ("virtio: Add improved queue allocation API") Signed-off-by: Xin Long <lucien.xin at gmail.com> --- drivers/virtio/virtio_ring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5c802d4..ca6bfdd 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1006,7 +1006,7 @@ struct virtqueue *vring_create_virtqueue( const char *name) { struct virtqueue *vq; - void *queue; + void *queue = NULL; dma_addr_t dma_addr; size_t queue_size_in_bytes; struct vring vring;...

...num" from a register so it's not really possible to tell what value it holds with static analysis. Let's just silence the warning. Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5c802d4..ca6bfdd 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1006,7 +1006,7 @@ struct virtqueue *vring_create_virtqueue( const char *name) { struct virtqueue *vq; - void *queue; + void *queue = NULL; dma_addr_t dma_addr; size_t queue_size_in_bytes; struct vring vring;

...2d1382fe9d ("virtio: Add improved queue allocation API") Signed-off-by: Xin Long <lucien.xin at gmail.com> --- drivers/virtio/virtio_ring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5c802d4..ca6bfdd 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -1006,7 +1006,7 @@ struct virtqueue *vring_create_virtqueue( const char *name) { struct virtqueue *vq; - void *queue; + void *queue = NULL; dma_addr_t dma_addr; size_t queue_size_in_bytes; struct vring vring;...

...etect the IOMMU. + * + * Note the reverse polarity (compared to most other features), + * this is for compatibility with legacy systems. + */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..114a0c8 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices h...

...etect the IOMMU. + * + * Note the reverse polarity (compared to most other features), + * this is for compatibility with legacy systems. + */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..114a0c8 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices h...

..., even if we've @@ -63,4 +63,6 @@ /* v1.0 compliant. */ #define VIRTIO_F_VERSION_1 32 +/* Do not bypass the IOMMU (if configured) */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..a0571f6 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices m...

..., even if we've @@ -63,4 +63,6 @@ /* v1.0 compliant. */ #define VIRTIO_F_VERSION_1 32 +/* Do not bypass the IOMMU (if configured) */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..a0571f6 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices m...

..., even if we've @@ -63,4 +63,6 @@ /* v1.0 compliant. */ #define VIRTIO_F_VERSION_1 32 +/* Do not bypass the IOMMU (if configured) */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..2a0c8bf 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices m...

..., even if we've @@ -63,4 +63,6 @@ /* v1.0 compliant. */ #define VIRTIO_F_VERSION_1 32 +/* Do not bypass the IOMMU (if configured) */ +#define VIRTIO_F_IOMMU_PLATFORM 33 #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index ca6bfdd..2a0c8bf 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -117,7 +117,10 @@ struct vring_virtqueue { #define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq) /* - * The interaction between virtio and a possible IOMMU is a mess. + * Modern virtio devices m...