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tcm_fc: Fix fc_exch memory leak in ft_send_resp_status 

This patch fixes a bug in tcm_fc where fc_exch memory from fc_exch_mgr->ep_pool
is currently being leaked by ft_send_resp_status() usage.  Following current
code in ft_queue_status() response path, using lport->tt.seq_send() needs to be
followed by a lport->tt.exch_done() in order to release fc_exch memory back into
libfc_em kmem_cache.

ft_send_resp_status() code is currently used in pre submit se_cmd ft_send_work()
error exceptions, TM request setup exceptions, and main TM response callback
path in ft_queue_tm_resp().  This bugfix addresses the leak in these cases.

Cc: Mark D Rustad <mark.d.rustad@intel.com>
Cc: Kiran Patil <kiran.patil@intel.com>
Cc: Robert Love <robert.w.love@intel.com>
Cc: Andy Grover <agrover@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
hifive-unleashed-5.1
Nicholas Bellinger 2012-03-09 23:45:38 -08:00
parent c7ec05c82b
commit 031ed4d565
1 changed files with 4 additions and 2 deletions
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6
drivers/target/tcm_fc/tfc_cmd.c
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@ -315,10 +315,12 @@ static void ft_send_resp_status(struct fc_lport *lport,
fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0);
sp = fr_seq(fp);
if (sp)
if (sp) {
lport->tt.seq_send(lport, sp, fp);
else
lport->tt.exch_done(sp);
} else {
lport->tt.frame_send(lport, fp);
}
}
/*