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Missed bits in BIDI commands support

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@751 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2009-04-06 11:17:22 +00:00
parent fec41c57ab
commit fb22b12769
1 changed files with 36 additions and 2 deletions
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38
scst/src/scst_lib.c
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@@ -2203,6 +2203,7 @@ int scst_alloc_space(struct scst_cmd *cmd)
int atomic = scst_cmd_atomic(cmd);
int flags;
struct scst_tgt_dev *tgt_dev = cmd->tgt_dev;
static int ll;
TRACE_ENTRY();
@@ -2218,7 +2219,6 @@ int scst_alloc_space(struct scst_cmd *cmd)
goto out;
if (unlikely(cmd->sg_cnt > tgt_dev->max_sg_cnt)) {
static int ll;
if (ll < 10) {
PRINT_INFO("Unable to complete command due to "
"SG IO count limitation (requested %d, "
@@ -2229,12 +2229,39 @@ int scst_alloc_space(struct scst_cmd *cmd)
goto out_sg_free;
}
if (cmd->data_direction != SCST_DATA_BIDI)
goto success;
cmd->in_sg = sgv_pool_alloc(tgt_dev->pool, cmd->in_bufflen, gfp_mask,
flags, &cmd->in_sg_cnt, &cmd->in_sgv,
&cmd->dev->dev_mem_lim, NULL);
if (cmd->in_sg == NULL)
goto out_sg_free;
if (unlikely(cmd->in_sg_cnt > tgt_dev->max_sg_cnt)) {
if (ll < 10) {
PRINT_INFO("Unable to complete command due to "
"SG IO count limitation (IN buffer, requested "
"%d, available %d, tgt lim %d)", cmd->in_sg_cnt,
tgt_dev->max_sg_cnt, cmd->tgt->sg_tablesize);
ll++;
}
goto out_in_sg_free;
}
success:
res = 0;
out:
TRACE_EXIT();
return res;
out_in_sg_free:
sgv_pool_free(cmd->in_sgv, &cmd->dev->dev_mem_lim);
cmd->in_sgv = NULL;
cmd->in_sg = NULL;
cmd->in_sg_cnt = 0;
out_sg_free:
sgv_pool_free(cmd->sgv, &cmd->dev->dev_mem_lim);
cmd->sgv = NULL;
@@ -2256,13 +2283,20 @@ static void scst_release_space(struct scst_cmd *cmd)
}
sgv_pool_free(cmd->sgv, &cmd->dev->dev_mem_lim);
cmd->sgv = NULL;
cmd->sg_cnt = 0;
cmd->sg = NULL;
cmd->bufflen = 0;
cmd->data_len = 0;
if (cmd->in_sgv != NULL) {
sgv_pool_free(cmd->in_sgv, &cmd->dev->dev_mem_lim);
cmd->in_sgv = NULL;
cmd->in_sg_cnt = 0;
cmd->in_sg = NULL;
cmd->in_bufflen = 0;
}
out:
TRACE_EXIT();
return;