From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
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@xxxxxxxxx>
Cc: Kiran Patil <kiran.patil@xxxxxxxxx>
Cc: Robert Love <robert.w.love@xxxxxxxxx>
Cc: Andy Grover <agrover@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/tcm_fc/tfc_cmd.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index 346e72d..dc772f9 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -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);
+ }
}
/*
--
1.7.2.5
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