RDMA/uverbs: Make the event_queue fds return POLLERR when disassociated

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If is_closed is set, and the event list is empty, then read() will return
-EIO without blocking. After setting is_closed in
ib_uverbs_free_event_queue(), we do trigger a wake_up on the poll_wait,
but the fops->poll() function does not check it, so poll will continue to
sleep on an empty list.

Fixes: 14e23bd6d2 ("RDMA/core: Fix locking in ib_uverbs_event_read")
Link: https://lore.kernel.org/r/0-v1-ace813388969+48859-uverbs_poll_fix%25jgg@mellanox.com
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Jason Gunthorpe 2020-04-06 21:44:26 -03:00

parent cf26deff90

commit eb356e6dc1

1 changed files with 2 additions and 0 deletions

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drivers/infiniband/core/uverbs_main.c

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