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| author |   Chuck Lever <chuck.lever@oracle.com> | 2020-06-15 09:20:52 -0400 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-06-22 09:34:35 -0400 |
| commit | 2acc5cae292355f5f18ad377a2a966e7f03c8fec (patch) | |
| tree | 695d23aa62617542560bed45e78e7a8ec41a9014 /net/sunrpc/xprtrdma/transport.c | |
| parent | Linux 5.8-rc2 (diff) | |
| download | linux-dev-2acc5cae292355f5f18ad377a2a966e7f03c8fec.tar.xz linux-dev-2acc5cae292355f5f18ad377a2a966e7f03c8fec.zip | |
xprtrdma: Prevent dereferencing r_xprt->rx_ep after it is freed
r_xprt->rx_ep is known to be good while the transport's send lock is
held. Otherwise additional references on rx_ep must be held when it
is used outside of that lock's critical sections.
For now, bump the rx_ep reference count once whenever there is at
least one outstanding Receive WR. This avoids the memory bandwidth
overhead of taking and releasing the reference count for every
ib_post_recv() and Receive completion.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/transport.c')
0 files changed, 0 insertions, 0 deletions