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| author |   Halil Pasic <pasic@linux.ibm.com> | 2019-07-23 17:11:01 +0200 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2019-07-26 13:36:18 +0200 |
| commit | 4f419eb14272e0698e8c55bb5f3f266cc2a21c81 (patch) | |
| tree | 104319c03391b176c77080df0292e26f7394a8a7 /fs | |
| parent | s390/dma: provide proper ARCH_ZONE_DMA_BITS value (diff) | |
| download | linux-dev-4f419eb14272e0698e8c55bb5f3f266cc2a21c81.tar.xz linux-dev-4f419eb14272e0698e8c55bb5f3f266cc2a21c81.zip | |
virtio/s390: fix race on airq_areas[]
The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that commit however the two infos share a
summary_indicator, which aggravates the situation. Which means
auto-online mechanism occasionally hangs the boot with virtio_blk.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 96b14536d935 ("virtio-ccw: virtio-ccw adapter interrupt support.")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions