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| author | Niels Dossche <dossche.niels@gmail.com> | 2022-02-28 17:53:30 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2022-04-04 19:45:02 +0200 |
| commit | 4d809f69695d4e7d1378b3a072fa9aef23123018 (patch) | |
| tree | a3292f1cb804d46dbd39a9303a75eee194c28f12 /samples/user_events | |
| parent | IB/cm: Cancel mad on the DREQ event when the state is MRA_REP_RCVD (diff) | |
| download | linux-4d809f69695d4e7d1378b3a072fa9aef23123018.tar.xz linux-4d809f69695d4e7d1378b3a072fa9aef23123018.zip | |
IB/rdmavt: add lock to call to rvt_error_qp to prevent a race condition
The documentation of the function rvt_error_qp says both r_lock and s_lock
need to be held when calling that function. It also asserts using lockdep
that both of those locks are held. However, the commit I referenced in
Fixes accidentally makes the call to rvt_error_qp in rvt_ruc_loopback no
longer covered by r_lock. This results in the lockdep assertion failing
and also possibly in a race condition.
Fixes: d757c60eca9b ("IB/rdmavt: Fix concurrency panics in QP post_send and modify to error")
Link: https://lore.kernel.org/r/20220228165330.41546-1-dossche.niels@gmail.com
Signed-off-by: Niels Dossche <dossche.niels@gmail.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'samples/user_events')
0 files changed, 0 insertions, 0 deletions