diff options
| author | Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com> | 2017-01-09 16:00:44 +0530 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-01-12 16:14:47 -0500 |
| commit | ce1ca7d2d140a1f4aaffd297ac487f246963dd2f (patch) | |
| tree | 5aeab5e0cb6ef404c894a18251588278b9432a2c | |
| parent | 546125d1614264d26080817d0c8cddb9b25081fa (diff) | |
svcrdma: avoid duplicate dma unmapping during error recovery
In rdma_read_chunk_frmr() when ib_post_send() fails, the error code path
invokes ib_dma_unmap_sg() to unmap the sg list. It then invokes
svc_rdma_put_frmr() which in turn tries to unmap the same sg list through
ib_dma_unmap_sg() again. This second unmap is invalid and could lead to
problems when the iova being unmapped is subsequently reused. Remove
the call to unmap in rdma_read_chunk_frmr() and let svc_rdma_put_frmr()
handle it.
Fixes: 412a15c0fe53 ("svcrdma: Port to new memory registration API")
Cc: stable@vger.kernel.org
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>