[PATCH v1 01/12] Target/transport: Allocate protection sg if needed

[Sagi Grimberg]

In case protection information is involved, allocate
protection SG-list for transport.

Signed-off-by: Sagi Grimberg <sa...@mellanox.com>
---
 drivers/target/target_core_transport.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/target/target_core_transport.c 
b/drivers/target/target_core_transport.c
index 24b4f65..f029bb7 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2036,6 +2036,10 @@ static inline void transport_free_pages(struct se_cmd 
*cmd)
        transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
        cmd->t_bidi_data_sg = NULL;
        cmd->t_bidi_data_nents = 0;
+
+       transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents);
+       cmd->t_prot_sg = NULL;
+       cmd->t_prot_nents = 0;
 }
 
 /**
@@ -2199,6 +2203,14 @@ transport_generic_new_cmd(struct se_cmd *cmd)
                                return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
                }
 
+               if (cmd->prot_type != TARGET_PROT_NORMAL) {
+                       ret = target_alloc_sgl(&cmd->t_prot_sg,
+                                              &cmd->t_prot_nents,
+                                              cmd->prot_length, zero_flag);
+                       if (ret < 0)
+                               return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+               }
+
                ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents,
                                       cmd->data_length, zero_flag);
                if (ret < 0)
-- 
1.7.1

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