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| author |   Mike Marciniszyn <mike.marciniszyn@intel.com> | 2019-06-07 08:25:31 -0400 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-06-11 17:06:45 -0300 |
| commit | da9de5f8527f4b9efc82f967d29a583318c034c7 (patch) | |
| tree | 336cbfb929371d36fb606e8d769a2dea105bdc4f /drivers/infiniband/hw/hfi1/chip.h | |
| parent | IB/hfi1: Validate fault injection opcode user input (diff) | |
| download | linux-dev-da9de5f8527f4b9efc82f967d29a583318c034c7.tar.xz linux-dev-da9de5f8527f4b9efc82f967d29a583318c034c7.zip | |
IB/hfi1: Close PSM sdma_progress sleep window
The call to sdma_progress() is called outside the wait lock.
In this case, there is a race condition where sdma_progress() can return
false and the sdma_engine can idle. If that happens, there will be no
more sdma interrupts to cause the wakeup and the user_sdma xmit will hang.
Fix by moving the lock to enclose the sdma_progress() call.
Also, delete busycount. The need for this was removed by:
commit bcad29137a97 ("IB/hfi1: Serve the most starved iowait entry first")
Cc: <stable@vger.kernel.org>
Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Reviewed-by: Gary Leshner <Gary.S.Leshner@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/chip.h')
0 files changed, 0 insertions, 0 deletions