nouveau: unlock mmap_sem on all errors from nouveau_range_fault

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Currently nouveau_svm_fault expects nouveau_range_fault to never unlock
mmap_sem, but the latter unlocks it for a random selection of error
codes. Fix this up by always unlocking mmap_sem for non-zero return values
in nouveau_range_fault, and only unlocking it in the caller for successful
returns.

Link: https://lore.kernel.org/r/20190724065258.16603-5-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Christoph Hellwig 2019-07-24 08:52:55 +02:00 • committed by Jason Gunthorpe

parent 5fbcf5015d

commit de4ee72846

1 changed files with 6 additions and 5 deletions

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drivers/gpu/drm/nouveau/nouveau_svm.c

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