Staging
v0.5.1
v0.5.1
https://github.com/torvalds/linux
Revision f7728002c1c7bfa787b276a31c3ef458739b8e7c authored by Halil Pasic on 14 November 2019, 12:46:46 UTC, committed by Michael S. Tsirkin on 19 November 2019, 10:13:49 UTC
Commit 780bc7903a32 ("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: 780bc7903a32 ("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>
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Tip revision: f7728002c1c7bfa787b276a31c3ef458739b8e7c authored by Halil Pasic on 14 November 2019, 12:46:46 UTC
virtio_ring: fix return code on DMA mapping fails
virtio_ring: fix return code on DMA mapping fails
Tip revision: f772800
| File | Mode | Size |
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| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
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| security | ||
| sound | ||
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| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 15.0 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.7 KB |
| .mailmap | -rw-r--r-- | 13.5 KB |
| COPYING | -rw-r--r-- | 423 bytes |
| CREDITS | -rw-r--r-- | 97.2 KB |
| Kbuild | -rw-r--r-- | 1.3 KB |
| Kconfig | -rw-r--r-- | 595 bytes |
| MAINTAINERS | -rw-r--r-- | 516.8 KB |
| Makefile | -rw-r--r-- | 59.5 KB |
| README | -rw-r--r-- | 727 bytes |
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