[patch 7/9] [PATCH] ctcm: fix minor findings from code analysis tool

Ursula Braun
2009-03-24T13:27:49Z

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From: Joel A. Fowler <fowlerja@us.ibm.com>
From: Ursula Braun <ursula.braun@de.ibm.com>

This patch fixes problems in the ctcm driver identified by
static code analysis:
o remove an unnecessary always true condition in ctcm_unpack_skb
o remove duplicate assignment in ctc_mpc_alloc_channel
o remove an unnecessary always true condition in ctcmpc_send_sweep_resp
o remove duplicate initialization in ctcmpc_unpack_skb
o shorten if condition in mpc_action_go_inop
o remove INOP event if mpc group is undefined in mpc_action_doxid7

Signed-off-by: Joel A. Fowler <fowlerja@us.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
---

drivers/s390/net/ctcm_main.c | 8 +++-----
drivers/s390/net/ctcm_mpc.c | 17 +++++------------
2 files changed, 8 insertions(+), 17 deletions(-)

Index: linux-2.6-uschi/drivers/s390/net/ctcm_main.c
===================================================================
--- linux-2.6-uschi.orig/drivers/s390/net/ctcm_main.c
+++ linux-2.6-uschi/drivers/s390/net/ctcm_main.c
@@ -168,11 +168,9 @@ void ctcm_unpack_skb(struct channel *ch,
if (len > 0) {
skb_pull(pskb, header->length);
if (skb_tailroom(pskb) < LL_HEADER_LENGTH) {
- if (!(ch->logflags & LOG_FLAG_OVERRUN)) {
- CTCM_DBF_DEV_NAME(TRACE, dev,
- "Overrun in ctcm_unpack_skb");
- ch->logflags |= LOG_FLAG_OVERRUN;
- }
+ CTCM_DBF_DEV_NAME(TRACE, dev,
+ "Overrun in ctcm_unpack_skb");
+ ch->logflags |= LOG_FLAG_OVERRUN;
return;
}
skb_put(pskb, LL_HEADER_LENGTH);
Index: linux-2.6-uschi/drivers/s390/net/ctcm_mpc.c
===================================================================
--- linux-2.6-uschi.orig/drivers/s390/net/ctcm_mpc.c
+++ linux-2.6-uschi/drivers/s390/net/ctcm_mpc.c
@@ -393,7 +393,6 @@ int ctc_mpc_alloc_channel(int port_num,
} else {
/* there are problems...bail out */
/* there may be a state mismatch so restart */
- grp->port_persist = 1;
fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
grp->allocchan_callback_retries = 0;
}
@@ -699,11 +698,9 @@ static void ctcmpc_send_sweep_resp(struc
return;

done:
- if (rc != 0) {
- grp->in_sweep = 0;
- ctcm_clear_busy_do(dev);
- fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
- }
+ grp->in_sweep = 0;
+ ctcm_clear_busy_do(dev);
+ fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);

return;
}
@@ -1118,7 +1115,6 @@ static void ctcmpc_unpack_skb(struct cha

if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY))
goto done;
- pdu_last_seen = 0;
while ((pskb->len > 0) && !pdu_last_seen) {
curr_pdu = (struct pdu *)pskb->data;

@@ -1396,8 +1392,7 @@ static void mpc_action_go_inop(fsm_insta
CTCM_FUNTAIL, dev->name);
if ((grp->saved_state != MPCG_STATE_RESET) ||
/* dealloc_channel has been called */
- ((grp->saved_state == MPCG_STATE_RESET) &&
- (grp->port_persist == 0)))
+ (grp->port_persist == 0))
fsm_deltimer(&priv->restart_timer);

wch = priv->channel[WRITE];
@@ -1917,10 +1912,8 @@ static void mpc_action_doxid7(fsm_instan

if (priv)
grp = priv->mpcg;
- if (grp == NULL) {
- fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
+ if (grp == NULL)
return;
- }

for (direction = READ; direction <= WRITE; direction++) {
struct channel *ch = priv->channel[direction];