IB/umad: Return EPOLLERR in case of when device disassociated

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Currently, polling a umad device will always works, even if the device was
disassociated. A disassociated device should immediately return EPOLLERR
from poll(). Otherwise userspace is endlessly hung on poll() with no idea
that the device has been removed from the system.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://lore.kernel.org/r/20210125121339.837518-3-leon@kernel.org
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Shay Drory 2021-01-25 14:13:39 +02:00 • committed by Jason Gunthorpe

parent 4fc5461823

commit def4cd43f5

1 changed files with 10 additions and 0 deletions

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drivers/infiniband/core/user_mad.c

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