Halil Pasic 5d0b56f672 virtio_ring: fix return code on DMA mapping fails ... [ Upstream commit f7728002c1 ] Commit 780bc7903a ("virtio_ring: Support DMA APIs") makes virtqueue_add() return -EIO when we fail to map our I/O buffers. This is a very realistic scenario for guests with encrypted memory, as swiotlb may run out of space, depending on it's size and the I/O load. The virtio-blk driver interprets -EIO form virtqueue_add() as an IO error, despite the fact that swiotlb full is in absence of bugs a recoverable condition. Let us change the return code to -ENOMEM, and make the block layer recover form these failures when virtio-blk encounters the condition described above. Cc: stable@vger.kernel.org Fixes: 780bc7903a ("virtio_ring: Support DMA APIs") Signed-off-by: Halil Pasic <pasic@linux.ibm.com> Tested-by: Michael Mueller <mimu@linux.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-12-01 09:17:40 +01:00
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Kconfig
Makefile
virtio.c
virtio_balloon.c
virtio_input.c
virtio_mmio.c
virtio_pci_common.c	virtio_pci: fix a NULL pointer reference in vp_del_vqs	2019-05-10 17:54:08 +02:00
virtio_pci_common.h
virtio_pci_legacy.c
virtio_pci_modern.c
virtio_ring.c	virtio_ring: fix return code on DMA mapping fails	2019-12-01 09:17:40 +01:00