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linux/drivers/virtio
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Will Deacon e3a1ab5aea virtio_ring: Fix querying of maximum DMA mapping size for virtio device 
commit 817fc978b5 upstream.

virtio_max_dma_size() returns the maximum DMA mapping size of the virtio
device by querying dma_max_mapping_size() for the device when the DMA
API is in use for the vring. Unfortunately, the device passed is
initialised by register_virtio_device() and does not inherit the DMA
configuration from its parent, resulting in SWIOTLB errors when bouncing
is enabled and the default 256K mapping limit (IO_TLB_SEGSIZE) is not
respected:

  | virtio-pci 0000:00:01.0: swiotlb buffer is full (sz: 294912 bytes), total 1024 (slots), used 725 (slots)

Follow the pattern used elsewhere in the virtio_ring code when calling
into the DMA layer and pass the parent device to dma_max_mapping_size()
instead.

Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20211201112018.25276-1-will@kernel.org
Acked-by: Jason Wang <jasowang@redhat.com>
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Fixes: e6d6dd6c87 ("virtio: Introduce virtio_max_dma_size()")
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-22 09:30:51 +01:00
..
Kconfig vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00
Makefile virtio: fix build for configs without dma-bufs 2020-08-19 06:43:28 +02:00
virtio_balloon.c virtio-balloon: Constify id_table 2020-10-21 10:34:08 -04:00
virtio_dma_buf.c virtio: fix build for configs without dma-bufs 2020-08-19 06:43:28 +02:00
virtio_input.c virtio_input: Constify id_table 2020-10-21 10:34:09 -04:00
virtio_mem.c vhost,vdpa,virtio: cleanups, fixes 2020-10-23 11:00:57 -07:00
virtio_mmio.c virtio: Implement get_shm_region for MMIO transport 2020-09-10 10:05:58 +02:00
virtio_pci_common.c virtio_pci: Support surprise removal of virtio pci device 2021-09-03 10:09:27 +02:00
virtio_pci_common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 78 2019-05-24 17:37:51 +02:00
virtio_pci_legacy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 78 2019-05-24 17:37:51 +02:00
virtio_pci_modern.c virtio: Implement get_shm_region for PCI transport 2020-09-10 10:05:58 +02:00
virtio_ring.c virtio_ring: Fix querying of maximum DMA mapping size for virtio device 2021-12-22 09:30:51 +01:00
virtio_vdpa.c virtio_vdpa: reject invalid vq indices 2021-09-03 10:09:27 +02:00
virtio.c virtio: write back F_VERSION_1 before validate 2021-10-20 11:45:01 +02:00