IB/hfi1: Fix PIO wakeup timing hole

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There is a timing hole if there had been greater than
PIO_WAIT_BATCH_SIZE waiters.  This code will dispatch the first
batch but leave the others in the queue.   If the restarted waiters
don't in turn wait on a buffer, there is a hang.

Fix by forcing a return when the QP queue is non-empty.

Reviewed-by: Vennila Megavannan <vennila.megavannan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Mike Marciniszyn 2016-03-07 11:35:30 -08:00 • committed by Doug Ledford

parent 5326dfbf00

commit 60df29581f

1 changed files with 7 additions and 5 deletions

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drivers/staging/rdma/hfi1/pio.c

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