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-rw-r--r--drivers/isdn/capi/capi.c54
-rw-r--r--drivers/isdn/gigaset/bas-gigaset.c298
-rw-r--r--drivers/isdn/gigaset/ev-layer.c13
-rw-r--r--drivers/isdn/hisax/q931.c4
-rw-r--r--drivers/isdn/i4l/isdn_common.c2
5 files changed, 220 insertions, 151 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 173c899a1fb..2e541fa0202 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -87,6 +87,11 @@ struct capincci;
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
struct capiminor;
+struct datahandle_queue {
+ struct list_head list;
+ u16 datahandle;
+};
+
struct capiminor {
struct list_head list;
struct capincci *nccip;
@@ -109,12 +114,9 @@ struct capiminor {
int outbytes;
/* transmit path */
- struct datahandle_queue {
- struct datahandle_queue *next;
- u16 datahandle;
- } *ackqueue;
+ struct list_head ackqueue;
int nack;
-
+ spinlock_t ackqlock;
};
#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
@@ -156,48 +158,54 @@ static LIST_HEAD(capiminor_list);
static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
{
- struct datahandle_queue *n, **pp;
+ struct datahandle_queue *n;
+ unsigned long flags;
n = kmalloc(sizeof(*n), GFP_ATOMIC);
- if (!n) {
- printk(KERN_ERR "capi: alloc datahandle failed\n");
- return -1;
+ if (unlikely(!n)) {
+ printk(KERN_ERR "capi: alloc datahandle failed\n");
+ return -1;
}
- n->next = NULL;
n->datahandle = datahandle;
- for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) ;
- *pp = n;
+ INIT_LIST_HEAD(&n->list);
+ spin_lock_irqsave(&mp->ackqlock, flags);
+ list_add_tail(&n->list, &mp->ackqueue);
mp->nack++;
+ spin_unlock_irqrestore(&mp->ackqlock, flags);
return 0;
}
static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
{
- struct datahandle_queue **pp, *p;
+ struct datahandle_queue *p, *tmp;
+ unsigned long flags;
- for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) {
- if ((*pp)->datahandle == datahandle) {
- p = *pp;
- *pp = (*pp)->next;
+ spin_lock_irqsave(&mp->ackqlock, flags);
+ list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
+ if (p->datahandle == datahandle) {
+ list_del(&p->list);
kfree(p);
mp->nack--;
+ spin_unlock_irqrestore(&mp->ackqlock, flags);
return 0;
}
}
+ spin_unlock_irqrestore(&mp->ackqlock, flags);
return -1;
}
static void capiminor_del_all_ack(struct capiminor *mp)
{
- struct datahandle_queue **pp, *p;
+ struct datahandle_queue *p, *tmp;
+ unsigned long flags;
- pp = &mp->ackqueue;
- while (*pp) {
- p = *pp;
- *pp = (*pp)->next;
+ spin_lock_irqsave(&mp->ackqlock, flags);
+ list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
+ list_del(&p->list);
kfree(p);
mp->nack--;
}
+ spin_unlock_irqrestore(&mp->ackqlock, flags);
}
@@ -220,6 +228,8 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
mp->ncci = ncci;
mp->msgid = 0;
atomic_set(&mp->ttyopencount,0);
+ INIT_LIST_HEAD(&mp->ackqueue);
+ spin_lock_init(&mp->ackqlock);
skb_queue_head_init(&mp->inqueue);
skb_queue_head_init(&mp->outqueue);
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index eb41aba3dde..8a45715dd4c 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -65,23 +65,22 @@ static struct usb_device_id gigaset_table [] = {
MODULE_DEVICE_TABLE(usb, gigaset_table);
-/*======================= local function prototypes =============================*/
+/*======================= local function prototypes ==========================*/
-/* This function is called if a new device is connected to the USB port. It
- * checks whether this new device belongs to this driver.
- */
+/* function called if a new device belonging to this driver is connected */
static int gigaset_probe(struct usb_interface *interface,
const struct usb_device_id *id);
/* Function will be called if the device is unplugged */
static void gigaset_disconnect(struct usb_interface *interface);
-static void read_ctrl_callback(struct urb *, struct pt_regs *);
+static int atread_submit(struct cardstate *, int);
static void stopurbs(struct bas_bc_state *);
+static int req_submit(struct bc_state *, int, int, int);
static int atwrite_submit(struct cardstate *, unsigned char *, int);
static int start_cbsend(struct cardstate *);
-/*==============================================================================*/
+/*============================================================================*/
struct bas_cardstate {
struct usb_device *udev; /* USB device pointer */
@@ -91,6 +90,7 @@ struct bas_cardstate {
struct urb *urb_ctrl; /* control pipe default URB */
struct usb_ctrlrequest dr_ctrl;
struct timer_list timer_ctrl; /* control request timeout */
+ int retry_ctrl;
struct timer_list timer_atrdy; /* AT command ready timeout */
struct urb *urb_cmd_out; /* for sending AT commands */
@@ -307,6 +307,7 @@ static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
* hang up any existing connection because of an unrecoverable error
* This function may be called from any context and takes care of scheduling
* the necessary actions for execution outside of interrupt context.
+ * cs->lock must not be held.
* argument:
* B channel control structure
*/
@@ -325,14 +326,17 @@ static inline void error_hangup(struct bc_state *bcs)
/* error_reset
* reset Gigaset device because of an unrecoverable error
- * This function may be called from any context, and should take care of
+ * This function may be called from any context, and takes care of
* scheduling the necessary actions for execution outside of interrupt context.
- * Right now, it just generates a kernel message calling for help.
+ * cs->lock must not be held.
* argument:
* controller state structure
*/
static inline void error_reset(struct cardstate *cs)
{
+ /* close AT command channel to recover (ignore errors) */
+ req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
+
//FIXME try to recover without bothering the user
dev_err(cs->dev,
"unrecoverable error - please disconnect Gigaset base to reset\n");
@@ -403,14 +407,30 @@ static void cmd_in_timeout(unsigned long data)
{
struct cardstate *cs = (struct cardstate *) data;
struct bas_cardstate *ucs = cs->hw.bas;
+ int rc;
if (!ucs->rcvbuf_size) {
gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
return;
}
- dev_err(cs->dev, "timeout reading AT response\n");
- error_reset(cs); //FIXME retry?
+ if (ucs->retry_cmd_in++ < BAS_RETRY) {
+ dev_notice(cs->dev, "control read: timeout, retry %d\n",
+ ucs->retry_cmd_in);
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc >= 0 || rc == -ENODEV)
+ /* resubmitted or disconnected */
+ /* - bypass regular exit block */
+ return;
+ } else {
+ dev_err(cs->dev,
+ "control read: timeout, giving up after %d tries\n",
+ ucs->retry_cmd_in);
+ }
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ error_reset(cs);
}
/* set/clear bits in base connection state, return previous state
@@ -428,6 +448,96 @@ inline static int update_basstate(struct bas_cardstate *ucs,
return state;
}
+/* read_ctrl_callback
+ * USB completion handler for control pipe input
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block
+ * urb->context = inbuf structure for controller state
+ */
+static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct inbuf_t *inbuf = urb->context;
+ struct cardstate *cs = inbuf->cs;
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int have_data = 0;
+ unsigned numbytes;
+ int rc;
+
+ update_basstate(ucs, 0, BS_ATRDPEND);
+
+ if (!ucs->rcvbuf_size) {
+ dev_warn(cs->dev, "%s: no receive in progress\n", __func__);
+ return;
+ }
+
+ del_timer(&ucs->timer_cmd_in);
+
+ switch (urb->status) {
+ case 0: /* normal completion */
+ numbytes = urb->actual_length;
+ if (unlikely(numbytes != ucs->rcvbuf_size)) {
+ dev_warn(cs->dev,
+ "control read: received %d chars, expected %d\n",
+ numbytes, ucs->rcvbuf_size);
+ if (numbytes > ucs->rcvbuf_size)
+ numbytes = ucs->rcvbuf_size;
+ }
+
+ /* copy received bytes to inbuf */
+ have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes);
+
+ if (unlikely(numbytes < ucs->rcvbuf_size)) {
+ /* incomplete - resubmit for remaining bytes */
+ ucs->rcvbuf_size -= numbytes;
+ ucs->retry_cmd_in = 0;
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc >= 0 || rc == -ENODEV)
+ /* resubmitted or disconnected */
+ /* - bypass regular exit block */
+ return;
+ error_reset(cs);
+ }
+ break;
+
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* no action necessary */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(urb->status));
+ break;
+
+ default: /* severe trouble */
+ dev_warn(cs->dev, "control read: %s\n",
+ get_usb_statmsg(urb->status));
+ if (ucs->retry_cmd_in++ < BAS_RETRY) {
+ dev_notice(cs->dev, "control read: retry %d\n",
+ ucs->retry_cmd_in);
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc >= 0 || rc == -ENODEV)
+ /* resubmitted or disconnected */
+ /* - bypass regular exit block */
+ return;
+ } else {
+ dev_err(cs->dev,
+ "control read: giving up after %d tries\n",
+ ucs->retry_cmd_in);
+ }
+ error_reset(cs);
+ }
+
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ if (have_data) {
+ gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
+ gigaset_schedule_event(cs);
+ }
+}
+
/* atread_submit
* submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
* parameters:
@@ -466,7 +576,7 @@ static int atread_submit(struct cardstate *cs, int timeout)
if ((ret = usb_submit_urb(ucs->urb_cmd_in, SLAB_ATOMIC)) != 0) {
update_basstate(ucs, 0, BS_ATRDPEND);
dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n",
- get_usb_statmsg(ret));
+ get_usb_rcmsg(ret));
return ret;
}
@@ -611,9 +721,12 @@ static void read_int_callback(struct urb *urb, struct pt_regs *regs)
kfree(ucs->rcvbuf);
ucs->rcvbuf = NULL;
ucs->rcvbuf_size = 0;
- if (rc != -ENODEV)
+ if (rc != -ENODEV) {
//FIXME corrective action?
+ spin_unlock_irqrestore(&cs->lock, flags);
error_reset(cs);
+ break;
+ }
}
spin_unlock_irqrestore(&cs->lock, flags);
break;
@@ -643,97 +756,6 @@ resubmit:
}
}
-/* read_ctrl_callback
- * USB completion handler for control pipe input
- * called by the USB subsystem in interrupt context
- * parameter:
- * urb USB request block
- * urb->context = inbuf structure for controller state
- */
-static void read_ctrl_callback(struct urb *urb, struct pt_regs *regs)
-{
- struct inbuf_t *inbuf = urb->context;
- struct cardstate *cs = inbuf->cs;
- struct bas_cardstate *ucs = cs->hw.bas;
- int have_data = 0;
- unsigned numbytes;
- int rc;
-
- update_basstate(ucs, 0, BS_ATRDPEND);
-
- if (!ucs->rcvbuf_size) {
- dev_warn(cs->dev, "%s: no receive in progress\n", __func__);
- return;
- }
-
- del_timer(&ucs->timer_cmd_in);
-
- switch (urb->status) {
- case 0: /* normal completion */
- numbytes = urb->actual_length;
- if (unlikely(numbytes == 0)) {
- dev_warn(cs->dev,
- "control read: empty block received\n");
- goto retry;
- }
- if (unlikely(numbytes != ucs->rcvbuf_size)) {
- dev_warn(cs->dev,
- "control read: received %d chars, expected %d\n",
- numbytes, ucs->rcvbuf_size);
- if (numbytes > ucs->rcvbuf_size)
- numbytes = ucs->rcvbuf_size;
- }
-
- /* copy received bytes to inbuf */
- have_data = gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes);
-
- if (unlikely(numbytes < ucs->rcvbuf_size)) {
- /* incomplete - resubmit for remaining bytes */
- ucs->rcvbuf_size -= numbytes;
- ucs->retry_cmd_in = 0;
- goto retry;
- }
- break;
-
- case -ENOENT: /* cancelled */
- case -ECONNRESET: /* cancelled (async) */
- case -EINPROGRESS: /* pending */
- case -ENODEV: /* device removed */
- case -ESHUTDOWN: /* device shut down */
- /* no action necessary */
- gig_dbg(DEBUG_USBREQ, "%s: %s",
- __func__, get_usb_statmsg(urb->status));
- break;
-
- default: /* severe trouble */
- dev_warn(cs->dev, "control read: %s\n",
- get_usb_statmsg(urb->status));
- retry:
- if (ucs->retry_cmd_in++ < BAS_RETRY) {
- dev_notice(cs->dev, "control read: retry %d\n",
- ucs->retry_cmd_in);
- rc = atread_submit(cs, BAS_TIMEOUT);
- if (rc >= 0 || rc == -ENODEV)
- /* resubmitted or disconnected */
- /* - bypass regular exit block */
- return;
- } else {
- dev_err(cs->dev,
- "control read: giving up after %d tries\n",
- ucs->retry_cmd_in);
- }
- error_reset(cs);
- }
-
- kfree(ucs->rcvbuf);
- ucs->rcvbuf = NULL;
- ucs->rcvbuf_size = 0;
- if (have_data) {
- gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
- gigaset_schedule_event(cs);
- }
-}
-
/* read_iso_callback
* USB completion handler for B channel isochronous input
* called by the USB subsystem in interrupt context
@@ -1378,6 +1400,7 @@ static void req_timeout(unsigned long data)
case HD_CLOSE_B1CHANNEL:
dev_err(bcs->cs->dev, "timeout closing channel %d\n",
bcs->channel + 1);
+ error_reset(bcs->cs);
break;
default:
@@ -1396,22 +1419,61 @@ static void req_timeout(unsigned long data)
static void write_ctrl_callback(struct urb *urb, struct pt_regs *regs)
{
struct bas_cardstate *ucs = urb->context;
+ int rc;
unsigned long flags;
- spin_lock_irqsave(&ucs->lock, flags);
- if (urb->status && ucs->pending) {
- dev_err(&ucs->interface->dev,
- "control request 0x%02x failed: %s\n",
- ucs->pending, get_usb_statmsg(urb->status));
- del_timer(&ucs->timer_ctrl);
- ucs->pending = 0;
- }
- /* individual handling of specific request types */
- switch (ucs->pending) {
- case HD_DEVICE_INIT_ACK: /* no reply expected */
- ucs->pending = 0;
+ /* check status */
+ switch (urb->status) {
+ case 0: /* normal completion */
+ spin_lock_irqsave(&ucs->lock, flags);
+ switch (ucs->pending) {
+ case HD_DEVICE_INIT_ACK: /* no reply expected */
+ del_timer(&ucs->timer_ctrl);
+ ucs->pending = 0;
+ break;
+ }
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ return;
+
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* ignore silently */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(urb->status));
break;
+
+ default: /* any failure */
+ if (++ucs->retry_ctrl > BAS_RETRY) {
+ dev_err(&ucs->interface->dev,
+ "control request 0x%02x failed: %s\n",
+ ucs->dr_ctrl.bRequest,
+ get_usb_statmsg(urb->status));
+ break; /* give up */
+ }
+ dev_notice(&ucs->interface->dev,
+ "control request 0x%02x: %s, retry %d\n",
+ ucs->dr_ctrl.bRequest, get_usb_statmsg(urb->status),
+ ucs->retry_ctrl);
+ /* urb->dev is clobbered by USB subsystem */
+ urb->dev = ucs->udev;
+ rc = usb_submit_urb(urb, SLAB_ATOMIC);
+ if (unlikely(rc)) {
+ dev_err(&ucs->interface->dev,
+ "could not resubmit request 0x%02x: %s\n",
+ ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc));
+ break;
+ }
+ /* resubmitted */
+ return;
}
+
+ /* failed, clear pending request */
+ spin_lock_irqsave(&ucs->lock, flags);
+ del_timer(&ucs->timer_ctrl);
+ ucs->pending = 0;
spin_unlock_irqrestore(&ucs->lock, flags);
}
@@ -1455,9 +1517,11 @@ static int req_submit(struct bc_state *bcs, int req, int val, int timeout)
usb_sndctrlpipe(ucs->udev, 0),
(unsigned char*) &ucs->dr_ctrl, NULL, 0,
write_ctrl_callback, ucs);
- if ((ret = usb_submit_urb(ucs->urb_ctrl, SLAB_ATOMIC)) != 0) {
+ ucs->retry_ctrl = 0;
+ ret = usb_submit_urb(ucs->urb_ctrl, SLAB_ATOMIC);
+ if (unlikely(ret)) {
dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n",
- req, get_usb_statmsg(ret));
+ req, get_usb_rcmsg(ret));
spin_unlock_irqrestore(&ucs->lock, flags);
return ret;
}
diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
index 18e05c09b71..44f02dbd111 100644
--- a/drivers/isdn/gigaset/ev-layer.c
+++ b/drivers/isdn/gigaset/ev-layer.c
@@ -1262,7 +1262,8 @@ static void do_action(int action, struct cardstate *cs,
break;
case ACT_HUPMODEM:
/* send "+++" (hangup in unimodem mode) */
- cs->ops->write_cmd(cs, "+++", 3, NULL);
+ if (cs->connected)
+ cs->ops->write_cmd(cs, "+++", 3, NULL);
break;
case ACT_RING:
/* get fresh AT state structure for new CID */
@@ -1294,7 +1295,6 @@ static void do_action(int action, struct cardstate *cs,
break;
case ACT_ICALL:
handle_icall(cs, bcs, p_at_state);
- at_state = *p_at_state;
break;
case ACT_FAILSDOWN:
dev_warn(cs->dev, "Could not shut down the device.\n");
@@ -1334,10 +1334,8 @@ static void do_action(int action, struct cardstate *cs,
*/
at_state->pending_commands |= PC_DLE0;
atomic_set(&cs->commands_pending, 1);
- } else {
+ } else
disconnect(p_at_state);
- at_state = *p_at_state;
- }
break;
case ACT_FAKEDLE0:
at_state->int_var[VAR_ZDLE] = 0;
@@ -1354,10 +1352,8 @@ static void do_action(int action, struct cardstate *cs,
at_state->cid = -1;
if (bcs && cs->onechannel)
at_state->pending_commands |= PC_DLE0;
- else {
+ else
disconnect(p_at_state);
- at_state = *p_at_state;
- }
schedule_init(cs, MS_RECOVER);
break;
case ACT_FAILDLE0:
@@ -1410,7 +1406,6 @@ static void do_action(int action, struct cardstate *cs,
case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL processing */
disconnect(p_at_state);
- at_state = *p_at_state;
break;
case ACT_ABORTDIAL: /* error/timeout during dial preparation */
diff --git a/drivers/isdn/hisax/q931.c b/drivers/isdn/hisax/q931.c
index abecabf8c27..aacbf0d14b6 100644
--- a/drivers/isdn/hisax/q931.c
+++ b/drivers/isdn/hisax/q931.c
@@ -1402,12 +1402,12 @@ dlogframe(struct IsdnCardState *cs, struct sk_buff *skb, int dir)
}
/* No, locate it in the table */
if (cset == 0) {
- for (i = 0; i < IESIZE; i++)
+ for (i = 0; i < IESIZE_NI1; i++)
if (*buf == ielist_ni1[i].nr)
break;
/* When not found, give appropriate msg */
- if (i != IESIZE) {
+ if (i != IESIZE_NI1) {
dp += sprintf(dp, " %s\n", ielist_ni1[i].descr);
dp += ielist_ni1[i].f(dp, buf);
} else
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index 81accdf3516..b26e509ec75 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -933,7 +933,7 @@ isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
count_put = count_pull;
if(count_put > 1)
tty_insert_flip_string(tty, skb->data, count_put - 1);
- last = skb->data[count_put] - 1;
+ last = skb->data[count_put - 1];
len -= count_put;
#ifdef CONFIG_ISDN_AUDIO
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-22 05:21:55 +0000