path: root/drivers/infiniband/ulp/iser/iscsi_iser.h
diff options
authorOr Gerlitz <ogerlitz@mellanox.com>2012-03-05 18:21:44 +0200
committerRoland Dreier <roland@purestorage.com>2012-03-05 08:53:05 -0800
commit89e984e2c2cd14f77ccb26c47726ac7f13b70ae8 (patch)
treee628854190ad60fc8890318236a3ec395b8b94bb /drivers/infiniband/ulp/iser/iscsi_iser.h
parentd474186f19d7ac1c7fbb293fdcfa46103e45e2ca (diff)
IB/iser: Post initial receive buffers before sending the final login request
An iser target may send iscsi NO-OP PDUs as soon as it marks the iSER iSCSI session as fully operative. This means that there is window where there are no posted receive buffers on the initiator side, so it's possible for the iSER RC connection to break because of RNR NAK / retry errors. To fix this, rely on the flags bits in the login request to have FFP (0x3) in the lower nibble as a marker for the final login request, and post an initial chunk of receive buffers before sending that login request instead of after getting the login response. Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Cc: <stable@vger.kernel.org> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index db7ea3704da..296be431a0e 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -366,4 +366,5 @@ int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task);
int iser_initialize_task_headers(struct iscsi_task *task,
struct iser_tx_desc *tx_desc);
+int iser_alloc_rx_descriptors(struct iser_conn *ib_conn);