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isdn/gigaset: clarify gigaset_modem_fill control structure

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Replace the flag-controlled retry loop by explicit goto statements
in the error branches to make the control structure easier to
understand.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tilman Schmidt 2014-12-10 13:41:55 +01:00 committed by David S. Miller
parent ff66fc3ab0
commit f650dd2805
1 changed files with 24 additions and 28 deletions
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52
drivers/isdn/gigaset/usb-gigaset.c
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@ -304,7 +304,6 @@ static void gigaset_modem_fill(unsigned long data)
struct cardstate *cs = (struct cardstate *) data;
struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
struct cmdbuf_t *cb;
int again;
gig_dbg(DEBUG_OUTPUT, "modem_fill");
@ -313,36 +312,33 @@ static void gigaset_modem_fill(unsigned long data)
return;
}
do {
again = 0;
if (!bcs->tx_skb) { /* no skb is being sent */
cb = cs->cmdbuf;
if (cb) { /* commands to send? */
gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
if (send_cb(cs, cb) < 0) {
gig_dbg(DEBUG_OUTPUT,
"modem_fill: send_cb failed");
again = 1; /* no callback will be
called! */
}
} else { /* skbs to send? */
bcs->tx_skb = skb_dequeue(&bcs->squeue);
if (bcs->tx_skb)
gig_dbg(DEBUG_INTR,
"Dequeued skb (Adr: %lx)!",
(unsigned long) bcs->tx_skb);
again:
if (!bcs->tx_skb) { /* no skb is being sent */
cb = cs->cmdbuf;
if (cb) { /* commands to send? */
gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
if (send_cb(cs, cb) < 0) {
gig_dbg(DEBUG_OUTPUT,
"modem_fill: send_cb failed");
goto again; /* no callback will be called! */
}
return;
}
if (bcs->tx_skb) {
gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
if (write_modem(cs) < 0) {
gig_dbg(DEBUG_OUTPUT,
"modem_fill: write_modem failed");
again = 1; /* no callback will be called! */
}
}
} while (again);
/* skbs to send? */
bcs->tx_skb = skb_dequeue(&bcs->squeue);
if (!bcs->tx_skb)
return;
gig_dbg(DEBUG_INTR, "Dequeued skb (Adr: %lx)!",
(unsigned long) bcs->tx_skb);
}
gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
if (write_modem(cs) < 0) {
gig_dbg(DEBUG_OUTPUT, "modem_fill: write_modem failed");
goto again; /* no callback will be called! */
}
}
/*