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Fixes race found by Anton Novodvorsky <anovodvorsky@gmail.com>

Browse Source 
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@222 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2007-11-15 15:54:53 +00:00
parent ffb60ac8fc
commit 93e0f56a01
1 changed files with 4 additions and 2 deletions
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6
scst/src/scst_targ.c
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@@ -1835,9 +1835,10 @@ out:
return;
}
static int scst_send_to_midlev(struct scst_cmd *cmd)
static int scst_send_to_midlev(struct scst_cmd **active_cmd)
{
int res, rc;
struct scst_cmd *cmd = *active_cmd;
struct scst_tgt_dev *tgt_dev = cmd->tgt_dev;
struct scst_device *dev = cmd->dev;
typeof(tgt_dev->expected_sn) expected_sn;
@@ -1921,6 +1922,7 @@ exec:
"thread context, rescheduling");
res = SCST_CMD_STATE_RES_NEED_THREAD;
scst_dec_on_dev_cmd(cmd);
*active_cmd = cmd;
if (count != 0)
goto out_unplug;
else
@@ -2885,7 +2887,7 @@ void scst_process_active_cmd(struct scst_cmd *cmd, int context)
cmd->tag);
break;
}
res = scst_send_to_midlev(cmd);
res = scst_send_to_midlev(&cmd);
/* !! At this point cmd, sess & tgt_dev can be already freed !! */
break;