4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Long Li <longli@xxxxxxxxxxxxx>
commit 21a4e14aaedbc85f203d37e56cb26235b22b43f6 upstream.
On RDMA errors, transport should disconnect the RDMA CM connection. This
will notify the upper layer, and it will attempt transport reconnect.
Signed-off-by: Long Li <longli@xxxxxxxxxxxxx>
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Reviewed-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
CC: Stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/smbdirect.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -862,6 +862,8 @@ static int smbd_post_send_negotiate_req(
ib_dma_unmap_single(info->id->device, request->sge[0].addr,
request->sge[0].length, DMA_TO_DEVICE);
+ smbd_disconnect_rdma_connection(info);
+
dma_mapping_failed:
mempool_free(request, info->request_mempool);
return rc;
@@ -1061,6 +1063,7 @@ static int smbd_post_send(struct smbd_co
if (atomic_dec_and_test(&info->send_pending))
wake_up(&info->wait_send_pending);
}
+ smbd_disconnect_rdma_connection(info);
} else
/* Reset timer for idle connection after packet is sent */
mod_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -1202,7 +1205,7 @@ static int smbd_post_recv(
if (rc) {
ib_dma_unmap_single(info->id->device, response->sge.addr,
response->sge.length, DMA_FROM_DEVICE);
-
+ smbd_disconnect_rdma_connection(info);
log_rdma_recv(ERR, "ib_post_recv failed rc=%d\n", rc);
}
@@ -2546,6 +2549,8 @@ dma_map_error:
if (atomic_dec_and_test(&info->mr_used_count))
wake_up(&info->wait_for_mr_cleanup);
+ smbd_disconnect_rdma_connection(info);
+
return NULL;
}