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Target/transport: Allocate protection sg if needed 

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

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Sagi Grimberg 2014-02-19 17:50:14 +02:00 committed by Nicholas Bellinger
parent 1e3ab99da6
commit acb2bde3e3
1 changed files with 12 additions and 0 deletions
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12
drivers/target/target_core_transport.c
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@ -2039,6 +2039,10 @@ 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;
}
/**
@ -2202,6 +2206,14 @@ 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, true);
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)