usb_gigaset: code cleanup

Reorganize the code of the Gigaset M10x driver to make it more
readable, less redundant, better aligned to the style of other
parts of the driver, and cause fewer checkpatch.pl complaints.

Impact: code reorganization, no functional change
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 22 deletions

diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index 1d2ae2e05e0b..690ac74c82a8 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -400,9 +400,9 @@ static void gigaset_freebcs(struct bc_state *bcs)
         gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel);
         clear_at_state(&bcs->at_state);
         gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel);
+        dev_kfree_skb(bcs->skb);
+        bcs->skb = NULL;
 
-        if (bcs->skb)
-                dev_kfree_skb(bcs->skb);
         for (i = 0; i < AT_NUM; ++i) {
                 kfree(bcs->commands[i]);
                 bcs->commands[i] = NULL;
@@ -560,16 +560,13 @@ void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 }
 
 
-static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct bc_state *bcs,
-                               struct cardstate *cs, int inputstate)
+static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs)
 /* inbuf->read must be allocated before! */
 {
         inbuf->head = 0;
         inbuf->tail = 0;
         inbuf->cs = cs;
-        inbuf->bcs = bcs; /*base driver: NULL*/
-        inbuf->rcvbuf = NULL;
-        inbuf->inputstate = inputstate;
+        inbuf->inputstate = INS_command;
 }
 
 /**
@@ -644,16 +641,13 @@ static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
         bcs->fcs = PPP_INITFCS;
         bcs->inputstate = 0;
         if (cs->ignoreframes) {
-                bcs->inputstate |= INS_skip_frame;
                 bcs->skb = NULL;
         } else {
                 bcs->skb = dev_alloc_skb(SBUFSIZE + cs->hw_hdr_len);
                 if (bcs->skb != NULL)
                         skb_reserve(bcs->skb, cs->hw_hdr_len);
-                else {
+                else
                         pr_err("out of memory\n");
-                        bcs->inputstate |= INS_skip_frame;
-                }
         }
 
         bcs->channel = channel;
@@ -674,8 +668,8 @@ static struct bc_state *gigaset_initbcs(struct bc_state *bcs,
         gig_dbg(DEBUG_INIT, "  failed");
 
         gig_dbg(DEBUG_INIT, "  freeing bcs[%d]->skb", channel);
-        if (bcs->skb)
-                dev_kfree_skb(bcs->skb);
+        dev_kfree_skb(bcs->skb);
+        bcs->skb = NULL;
 
         return NULL;
 }
@@ -764,10 +758,7 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
         cs->cbytes = 0;
 
         gig_dbg(DEBUG_INIT, "setting up inbuf");
-        if (onechannel) {                       //FIXME distinction necessary?
-                gigaset_inbuf_init(cs->inbuf, cs->bcs, cs, INS_command);
-        } else
-                gigaset_inbuf_init(cs->inbuf, NULL,    cs, INS_command);
+        gigaset_inbuf_init(cs->inbuf, cs);
 
         cs->connected = 0;
         cs->isdn_up = 0;
@@ -854,9 +845,10 @@ void gigaset_bcs_reinit(struct bc_state *bcs)
         bcs->chstate = 0;
 
         bcs->ignore = cs->ignoreframes;
-        if (bcs->ignore)
-                bcs->inputstate |= INS_skip_frame;
-
+        if (bcs->ignore) {
+                dev_kfree_skb(bcs->skb);
+                bcs->skb = NULL;
+        }
 
         cs->ops->reinitbcshw(bcs);
 }
@@ -877,8 +869,6 @@ static void cleanup_cs(struct cardstate *cs)
         free_strings(&cs->at_state);
         gigaset_at_init(&cs->at_state, NULL, cs, 0);
 
-        kfree(cs->inbuf->rcvbuf);
-        cs->inbuf->rcvbuf = NULL;
         cs->inbuf->inputstate = INS_command;
         cs->inbuf->head = 0;
         cs->inbuf->tail = 0;