From: Christoph Hellwig <hch@lst.de>
To: Robin Murphy <robin.murphy@arm.com>
Cc: mst@redhat.com, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Eric Auger <eric.auger@redhat.com>,
iommu@lists.linux-foundation.org, eric.auger.pro@gmail.com,
hch@lst.de, m.szyprowski@samsung.com
Subject: Re: [PATCH 2/2] virtio/virtio_ring: Fix the dma_max_mapping_size call
Date: Tue, 23 Jul 2019 17:38:51 +0200 [thread overview]
Message-ID: <20190723153851.GE720@lst.de> (raw)
In-Reply-To: <e4a288f2-a93a-5ce4-32da-f5434302551f@arm.com>
On Mon, Jul 22, 2019 at 04:36:09PM +0100, Robin Murphy wrote:
>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
>> index c8be1c4f5b55..37c143971211 100644
>> --- a/drivers/virtio/virtio_ring.c
>> +++ b/drivers/virtio/virtio_ring.c
>> @@ -262,7 +262,7 @@ size_t virtio_max_dma_size(struct virtio_device *vdev)
>> {
>> size_t max_segment_size = SIZE_MAX;
>> - if (vring_use_dma_api(vdev))
>> + if (vring_use_dma_api(vdev) && vdev->dev.dma_mask)
>
> Hmm, might it make sense to roll that check up into vring_use_dma_api()
> itself? After all, if the device has no mask then it's likely that other
> DMA API ops wouldn't really work as expected either.
Makes sense to me.
next prev parent reply other threads:[~2019-07-23 15:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190722145509.1284-1-eric.auger@redhat.com>
2019-07-22 14:55 ` [PATCH 1/2] dma-mapping: Protect dma_addressing_limited against NULL dma_mask Eric Auger
2019-07-22 14:55 ` [PATCH 2/2] virtio/virtio_ring: Fix the dma_max_mapping_size call Eric Auger
[not found] ` <20190722145509.1284-2-eric.auger@redhat.com>
2019-07-22 15:26 ` [PATCH 1/2] dma-mapping: Protect dma_addressing_limited against NULL dma_mask Christoph Hellwig
[not found] ` <20190722152637.GA3780@lst.de>
2019-07-22 15:46 ` Auger Eric
[not found] ` <20190722145509.1284-3-eric.auger@redhat.com>
2019-07-22 15:27 ` [PATCH 2/2] virtio/virtio_ring: Fix the dma_max_mapping_size call Christoph Hellwig
2019-07-22 15:33 ` Michael S. Tsirkin
2019-07-22 15:36 ` Robin Murphy
[not found] ` <20190722152710.GB3780@lst.de>
2019-07-22 15:39 ` Michael S. Tsirkin
[not found] ` <e4a288f2-a93a-5ce4-32da-f5434302551f@arm.com>
2019-07-22 15:45 ` Michael S. Tsirkin
2019-07-23 15:38 ` Christoph Hellwig [this message]
2019-07-24 22:10 ` Michael S. Tsirkin
[not found] ` <20190723114750-mutt-send-email-mst@kernel.org>
2019-07-25 5:25 ` Christoph Hellwig
2019-07-25 11:53 ` Auger Eric
[not found] ` <fa0fbad5-9b44-d937-e0fd-65fb20c90666@redhat.com>
2019-07-25 13:04 ` Christoph Hellwig
[not found] ` <20190725130416.GA4992@lst.de>
2019-07-25 16:32 ` Auger Eric
[not found] ` <20190722112704-mutt-send-email-mst@kernel.org>
2019-07-23 15:38 ` Christoph Hellwig
[not found] ` <20190723153830.GD720@lst.de>
2019-07-23 15:47 ` Michael S. Tsirkin
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