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author | Chuck Lever <chuck.lever@oracle.com> | 2016-11-07 16:16:24 -0500 |
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committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2016-11-10 11:04:54 -0500 |
commit | 62bdf94a2049822ef8c6d4b0e83cd9c3a1663ab4 (patch) | |
tree | 76dda0f9318f823055e402c288efd935559b8261 /fs | |
parent | 0ac84b72c0ed96ace1d8973a06f0120a3b905177 (diff) | |
download | linux-62bdf94a2049822ef8c6d4b0e83cd9c3a1663ab4.tar.gz |
xprtrdma: Fix DMAR failure in frwr_op_map() after reconnect
When a LOCALINV WR is flushed, the frmr is marked STALE, then frwr_op_unmap_sync DMA-unmaps the frmr's SGL. These STALE frmrs are then recovered when frwr_op_map hunts for an INVALID frmr to use. All other cases that need frmr recovery leave that SGL DMA-mapped. The FRMR recovery path unconditionally DMA-unmaps the frmr's SGL. To avoid DMA unmapping the SGL twice for flushed LOCAL_INV WRs, alter the recovery logic (rather than the hot frwr_op_unmap_sync path) to distinguish among these cases. This solution also takes care of the case where multiple LOCAL_INV WRs are issued for the same rpcrdma_req, some complete successfully, but some are flushed. Reported-by: Vasco Steinmetz <linux@kyberraum.net> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Vasco Steinmetz <linux@kyberraum.net> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions