Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

1 files changed, 61 insertions, 71 deletions

diff --git a/drivers/isdn/gigaset/asyncdata.c b/drivers/isdn/gigaset/asyncdata.c
index 171f8b703d61..ce3cd77094b3 100644
--- a/drivers/isdn/gigaset/asyncdata.c
+++ b/drivers/isdn/gigaset/asyncdata.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2005 by Tilman Schmidt <tilman@imap.cc>,
  *                       Hansjoerg Lipp <hjlipp@web.de>,
- *                       Stefan Eilers <Eilers.Stefan@epost.de>.
+ *                       Stefan Eilers.
  *
  * =====================================================================
  *      This program is free software; you can redistribute it and/or
@@ -11,10 +11,6 @@
  *      published by the Free Software Foundation; either version 2 of
  *      the License, or (at your option) any later version.
  * =====================================================================
- * ToDo: ...
- * =====================================================================
- * Version: $Id: asyncdata.c,v 1.2.2.7 2005/11/13 23:05:18 hjlipp Exp $
- * =====================================================================
  */
 
 #include "gigaset.h"
@@ -45,7 +41,7 @@ static inline int muststuff(unsigned char c)
  *      number of processed bytes
  */
 static inline int cmd_loop(unsigned char c, unsigned char *src, int numbytes,
-                           struct inbuf_t *inbuf)
+                           struct inbuf_t *inbuf)
 {
         struct cardstate *cs = inbuf->cs;
         unsigned cbytes      = cs->cbytes;
@@ -55,10 +51,11 @@ static inline int cmd_loop(unsigned char c, unsigned char *src, int numbytes,
         for (;;) {
                 cs->respdata[cbytes] = c;
                 if (c == 10 || c == 13) {
-                        dbg(DEBUG_TRANSCMD, "%s: End of Command (%d Bytes)",
-                            __func__, cbytes);
+                        gig_dbg(DEBUG_TRANSCMD, "%s: End of Command (%d Bytes)",
+                                __func__, cbytes);
                         cs->cbytes = cbytes;
-                        gigaset_handle_modem_response(cs); /* can change cs->dle */
+                        gigaset_handle_modem_response(cs); /* can change
+                                                              cs->dle */
                         cbytes = 0;
 
                         if (cs->dle &&
@@ -71,7 +68,7 @@ static inline int cmd_loop(unsigned char c, unsigned char *src, int numbytes,
                         if (cbytes < MAX_RESP_SIZE - 1)
                                 cbytes++;
                         else
-                                warn("response too large");
+                                dev_warn(cs->dev, "response too large\n");
                 }
 
                 if (!numbytes)
@@ -96,11 +93,12 @@ static inline int cmd_loop(unsigned char c, unsigned char *src, int numbytes,
  *      number of processed bytes
  */
 static inline int lock_loop(unsigned char *src, int numbytes,
-                            struct inbuf_t *inbuf)
+                            struct inbuf_t *inbuf)
 {
         struct cardstate *cs = inbuf->cs;
 
-        gigaset_dbg_buffer(DEBUG_LOCKCMD, "received response", numbytes, src, 0);
+        gigaset_dbg_buffer(DEBUG_LOCKCMD, "received response",
+                           numbytes, src);
         gigaset_if_receive(cs, src, numbytes);
 
         return numbytes;
@@ -115,24 +113,18 @@ static inline int lock_loop(unsigned char *src, int numbytes,
  *      numbytes (all bytes processed) on error --FIXME
  */
 static inline int hdlc_loop(unsigned char c, unsigned char *src, int numbytes,
-                            struct inbuf_t *inbuf)
+                            struct inbuf_t *inbuf)
 {
         struct cardstate *cs = inbuf->cs;
         struct bc_state *bcs = inbuf->bcs;
-        int inputstate;
-        __u16 fcs;
-        struct sk_buff *skb;
+        int inputstate = bcs->inputstate;
+        __u16 fcs = bcs->fcs;
+        struct sk_buff *skb = bcs->skb;
         unsigned char error;
         struct sk_buff *compskb;
         int startbytes = numbytes;
         int l;
 
-        IFNULLRETVAL(bcs, numbytes);
-        inputstate = bcs->inputstate;
-        fcs = bcs->fcs;
-        skb = bcs->skb;
-        IFNULLRETVAL(skb, numbytes);
-
         if (unlikely(inputstate & INS_byte_stuff)) {
                 inputstate &= ~INS_byte_stuff;
                 goto byte_stuff;
@@ -156,39 +148,37 @@ byte_stuff:
                         c ^= PPP_TRANS;
 #ifdef CONFIG_GIGASET_DEBUG
                         if (unlikely(!muststuff(c)))
-                                dbg(DEBUG_HDLC,
-                                    "byte stuffed: 0x%02x", c);
+                                gig_dbg(DEBUG_HDLC, "byte stuffed: 0x%02x", c);
 #endif
                 } else if (unlikely(c == PPP_FLAG)) {
                         if (unlikely(inputstate & INS_skip_frame)) {
                                 if (!(inputstate & INS_have_data)) { /* 7E 7E */
-                                        //dbg(DEBUG_HDLC, "(7e)7e------------------------");
 #ifdef CONFIG_GIGASET_DEBUG
                                         ++bcs->emptycount;
 #endif
                                 } else
-                                        dbg(DEBUG_HDLC,
+                                        gig_dbg(DEBUG_HDLC,
                                             "7e----------------------------");
 
                                 /* end of frame */
                                 error = 1;
                                 gigaset_rcv_error(NULL, cs, bcs);
                         } else if (!(inputstate & INS_have_data)) { /* 7E 7E */
-                                //dbg(DEBUG_HDLC, "(7e)7e------------------------");
 #ifdef CONFIG_GIGASET_DEBUG
                                 ++bcs->emptycount;
 #endif
                                 break;
                         } else {
-                                dbg(DEBUG_HDLC,
-                                    "7e----------------------------");
+                                gig_dbg(DEBUG_HDLC,
+                                        "7e----------------------------");
 
                                 /* end of frame */
                                 error = 0;
 
                                 if (unlikely(fcs != PPP_GOODFCS)) {
-                                        err("Packet checksum at %lu failed, "
-                                            "packet is corrupted (%u bytes)!",
+                                        dev_err(cs->dev,
+                                            "Packet checksum at %lu failed, "
+                                            "packet is corrupted (%u bytes)!\n",
                                             bcs->rcvbytes, skb->len);
                                         compskb = NULL;
                                         gigaset_rcv_error(compskb, cs, bcs);
@@ -202,9 +192,11 @@ byte_stuff:
                                                 skb = NULL;
                                                 inputstate |= INS_skip_frame;
                                                 if (l == 1) {
-                                                        err("invalid packet size (1)!");
+                                                        dev_err(cs->dev,
+                                                  "invalid packet size (1)!\n");
                                                         error = 1;
-                                                        gigaset_rcv_error(NULL, cs, bcs);
+                                                        gigaset_rcv_error(NULL,
+                                                                cs, bcs);
                                                 }
                                         }
                                         if (likely(!(error ||
@@ -227,7 +219,8 @@ byte_stuff:
                         } else if (likely((skb = dev_alloc_skb(SBUFSIZE + HW_HDR_LEN)) != NULL)) {
                                 skb_reserve(skb, HW_HDR_LEN);
                         } else {
-                                warn("could not allocate new skb");
+                                dev_warn(cs->dev,
+                                         "could not allocate new skb\n");
                                 inputstate |= INS_skip_frame;
                         }
 
@@ -235,7 +228,7 @@ byte_stuff:
 #ifdef CONFIG_GIGASET_DEBUG
                 } else if (unlikely(muststuff(c))) {
                         /* Should not happen. Possible after ZDLE=1<CR><LF>. */
-                        dbg(DEBUG_HDLC, "not byte stuffed: 0x%02x", c);
+                        gig_dbg(DEBUG_HDLC, "not byte stuffed: 0x%02x", c);
 #endif
                 }
 
@@ -243,8 +236,8 @@ byte_stuff:
 
 #ifdef CONFIG_GIGASET_DEBUG
                 if (unlikely(!(inputstate & INS_have_data))) {
-                        dbg(DEBUG_HDLC,
-                            "7e (%d x) ================", bcs->emptycount);
+                        gig_dbg(DEBUG_HDLC, "7e (%d x) ================",
+                                bcs->emptycount);
                         bcs->emptycount = 0;
                 }
 #endif
@@ -253,14 +246,13 @@ byte_stuff:
 
                 if (likely(!(inputstate & INS_skip_frame))) {
                         if (unlikely(skb->len == SBUFSIZE)) {
-                                warn("received packet too long");
+                                dev_warn(cs->dev, "received packet too long\n");
                                 dev_kfree_skb_any(skb);
                                 skb = NULL;
                                 inputstate |= INS_skip_frame;
                                 break;
                         }
-                        *gigaset_skb_put_quick(skb, 1) = c;
-                        /* *__skb_put (skb, 1) = c; */
+                        *__skb_put(skb, 1) = c;
                         fcs = crc_ccitt_byte(fcs, c);
                 }
 
@@ -289,19 +281,14 @@ byte_stuff:
  *      numbytes (all bytes processed) on error --FIXME
  */
 static inline int iraw_loop(unsigned char c, unsigned char *src, int numbytes,
-                            struct inbuf_t *inbuf)
+                            struct inbuf_t *inbuf)
 {
         struct cardstate *cs = inbuf->cs;
         struct bc_state *bcs = inbuf->bcs;
-        int inputstate;
-        struct sk_buff *skb;
+        int inputstate = bcs->inputstate;
+        struct sk_buff *skb = bcs->skb;
         int startbytes = numbytes;
 
-        IFNULLRETVAL(bcs, numbytes);
-        inputstate = bcs->inputstate;
-        skb = bcs->skb;
-        IFNULLRETVAL(skb, numbytes);
-
         for (;;) {
                 /* add character */
                 inputstate |= INS_have_data;
@@ -309,13 +296,13 @@ static inline int iraw_loop(unsigned char c, unsigned char *src, int numbytes,
                 if (likely(!(inputstate & INS_skip_frame))) {
                         if (unlikely(skb->len == SBUFSIZE)) {
                                 //FIXME just pass skb up and allocate a new one
-                                warn("received packet too long");
+                                dev_warn(cs->dev, "received packet too long\n");
                                 dev_kfree_skb_any(skb);
                                 skb = NULL;
                                 inputstate |= INS_skip_frame;
                                 break;
                         }
-                        *gigaset_skb_put_quick(skb, 1) = gigaset_invtab[c];
+                        *__skb_put(skb, 1) = gigaset_invtab[c];
                 }
 
                 if (unlikely(!numbytes))
@@ -343,7 +330,7 @@ static inline int iraw_loop(unsigned char c, unsigned char *src, int numbytes,
                                   != NULL)) {
                         skb_reserve(skb, HW_HDR_LEN);
                 } else {
-                        warn("could not allocate new skb");
+                        dev_warn(cs->dev, "could not allocate new skb\n");
                         inputstate |= INS_skip_frame;
                 }
         }
@@ -364,13 +351,13 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
 
         head = atomic_read(&inbuf->head);
         tail = atomic_read(&inbuf->tail);
-        dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
+        gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
 
         if (head != tail) {
                 cs = inbuf->cs;
                 src = inbuf->data + head;
                 numbytes = (head > tail ? RBUFSIZE : tail) - head;
-                dbg(DEBUG_INTR, "processing %u bytes", numbytes);
+                gig_dbg(DEBUG_INTR, "processing %u bytes", numbytes);
 
                 while (numbytes) {
                         if (atomic_read(&cs->mstate) == MS_LOCKED) {
@@ -392,8 +379,7 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
 
                                 if (!(inbuf->inputstate & INS_DLE_char)) {
 
-                                        /* FIXME Einfach je nach Modus Funktionszeiger in cs setzen [hier+hdlc_loop]?  */
-                                        /* FIXME Spart folgendes "if" und ermoeglicht andere Protokolle */
+                                        /* FIXME use function pointers?  */
                                         if (inbuf->inputstate & INS_command)
                                                 procbytes = cmd_loop(c, src, numbytes, inbuf);
                                         else if (inbuf->bcs->proto2 == ISDN_PROTO_L2_HDLC)
@@ -403,13 +389,14 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
 
                                         src += procbytes;
                                         numbytes -= procbytes;
-                                } else {  /* DLE-char */
+                                } else {  /* DLE char */
                                         inbuf->inputstate &= ~INS_DLE_char;
                                         switch (c) {
                                         case 'X': /*begin of command*/
 #ifdef CONFIG_GIGASET_DEBUG
                                                 if (inbuf->inputstate & INS_command)
-                                                        err("received <DLE> 'X' in command mode");
+                                                        dev_err(cs->dev,
+                                        "received <DLE> 'X' in command mode\n");
 #endif
                                                 inbuf->inputstate |=
                                                         INS_command | INS_DLE_command;
@@ -417,7 +404,8 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
                                         case '.': /*end of command*/
 #ifdef CONFIG_GIGASET_DEBUG
                                                 if (!(inbuf->inputstate & INS_command))
-                                                        err("received <DLE> '.' in hdlc mode");
+                                                        dev_err(cs->dev,
+                                        "received <DLE> '.' in hdlc mode\n");
 #endif
                                                 inbuf->inputstate &= cs->dle ?
                                                         ~(INS_DLE_command|INS_command)
@@ -425,7 +413,9 @@ void gigaset_m10x_input(struct inbuf_t *inbuf)
                                                 break;
                                         //case DLE_FLAG: /*DLE_FLAG in data stream*/ /* schon oben behandelt! */
                                         default:
-                                                err("received 0x10 0x%02x!", (int) c);
+                                                dev_err(cs->dev,
+                                                      "received 0x10 0x%02x!\n",
+                                                        (int) c);
                                                 /* FIXME: reset driver?? */
                                         }
                                 }
@@ -444,7 +434,7 @@ nextbyte:
                         }
                 }
 
-                dbg(DEBUG_INTR, "setting head to %u", head);
+                gig_dbg(DEBUG_INTR, "setting head to %u", head);
                 atomic_set(&inbuf->head, head);
         }
 }
@@ -479,14 +469,13 @@ static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int head, int tail)
                         stuf_cnt++;
                 fcs = crc_ccitt_byte(fcs, *cp++);
         }
-        fcs ^= 0xffff;                 /* complement */
+        fcs ^= 0xffff;                  /* complement */
 
         /* size of new buffer: original size + number of stuffing bytes
          * + 2 bytes FCS + 2 stuffing bytes for FCS (if needed) + 2 flag bytes
          */
         hdlc_skb = dev_alloc_skb(skb->len + stuf_cnt + 6 + tail + head);
         if (!hdlc_skb) {
-                err("unable to allocate memory for HDLC encoding!");
                 dev_kfree_skb(skb);
                 return NULL;
         }
@@ -508,7 +497,7 @@ static struct sk_buff *HDLC_Encode(struct sk_buff *skb, int head, int tail)
         }
 
         /* Finally add FCS (byte stuffed) and flag sequence */
-        c = (fcs & 0x00ff);      /* least significant byte first */
+        c = (fcs & 0x00ff);     /* least significant byte first */
         if (muststuff(c)) {
                 *(skb_put(hdlc_skb, 1)) = PPP_ESCAPE;
                 c ^= PPP_TRANS;
@@ -546,7 +535,6 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail)
         /* worst case: every byte must be stuffed */
         iraw_skb = dev_alloc_skb(2*skb->len + tail + head);
         if (!iraw_skb) {
-                err("unable to allocate memory for HDLC encoding!");
                 dev_kfree_skb(skb);
                 return NULL;
         }
@@ -577,21 +565,23 @@ static struct sk_buff *iraw_encode(struct sk_buff *skb, int head, int tail)
  */
 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb)
 {
-        unsigned len;
-
-        IFNULLRETVAL(bcs, -EFAULT);
-        IFNULLRETVAL(skb, -EFAULT);
-        len = skb->len;
+        unsigned len = skb->len;
+        unsigned long flags;
 
         if (bcs->proto2 == ISDN_PROTO_L2_HDLC)
                 skb = HDLC_Encode(skb, HW_HDR_LEN, 0);
         else
                 skb = iraw_encode(skb, HW_HDR_LEN, 0);
-        if (!skb)
+        if (!skb) {
+                err("unable to allocate memory for encoding!\n");
                 return -ENOMEM;
+        }
 
         skb_queue_tail(&bcs->squeue, skb);
-        tasklet_schedule(&bcs->cs->write_tasklet);
+        spin_lock_irqsave(&bcs->cs->lock, flags);
+        if (bcs->cs->connected)
+                tasklet_schedule(&bcs->cs->write_tasklet);
+        spin_unlock_irqrestore(&bcs->cs->lock, flags);
 
         return len;     /* ok so far */
 }