AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/net/sunrpc/xprtrdma
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Sriharsha Basavapatna ce1ca7d2d1 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: 412a15c0fe ("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>
2017-01-12 16:14:47 -05:00
..
backchannel.c xprtrdma: Cap size of callback buffer resources 2016-11-29 16:45:44 -05:00
fmr_ops.c xprtrdma: Basic support for Remote Invalidation 2016-09-19 13:08:38 -04:00
frwr_ops.c xprtrdma: Update documenting comment 2016-11-29 16:45:44 -05:00
Makefile xprtrdma: Remove ALLPHYSICAL memory registration mode 2016-07-11 15:50:43 -04:00
module.c rpcrdma: Merge svcrdma and xprtrdma modules into one 2015-06-04 16:56:02 -04:00
rpc_rdma.c xprtrdma: Relocate connection helper functions 2016-11-29 16:45:44 -05:00
svc_rdma_backchannel.c svcrdma: Remove unused variables in xprt_rdma_bc_allocate() 2016-11-30 17:31:14 -05:00
svc_rdma_marshal.c svcrdma: Generalize svc_rdma_xdr_decode_req() 2016-05-13 15:53:06 -04:00
svc_rdma_recvfrom.c svcrdma: avoid duplicate dma unmapping during error recovery 2017-01-12 16:14:47 -05:00
svc_rdma_sendto.c svcrdma: Further clean-up of svc_rdma_get_inv_rkey() 2016-11-30 17:31:16 -05:00
svc_rdma_transport.c The one new feature is support for a new NFSv4.2 mode_umask attribute 2016-12-16 10:48:28 -08:00
svc_rdma.c svcrdma: Define maximum number of backchannel requests 2016-01-19 15:30:48 -05:00
transport.c xprtrdma: Relocate connection helper functions 2016-11-29 16:45:44 -05:00
verbs.c xprtrdma: Shorten QP access error message 2016-11-29 16:45:44 -05:00
xprt_rdma.h xprtrdma: Relocate connection helper functions 2016-11-29 16:45:44 -05:00