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-rw-r--r--drivers/usb/class/cdc-acm.c82
-rw-r--r--drivers/usb/class/cdc-acm.h2
-rw-r--r--drivers/usb/class/cdc-wdm.c2
-rw-r--r--drivers/usb/class/usblp.c22
-rw-r--r--drivers/usb/class/usbtmc.c2
5 files changed, 60 insertions, 50 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 34d4eb9..975d556 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -170,6 +170,7 @@ static void acm_write_done(struct acm *acm, struct acm_wb *wb)
{
wb->use = 0;
acm->transmitting--;
+ usb_autopm_put_interface_async(acm->control);
}
/*
@@ -211,9 +212,12 @@ static int acm_write_start(struct acm *acm, int wbn)
}
dbg("%s susp_count: %d", __func__, acm->susp_count);
+ usb_autopm_get_interface_async(acm->control);
if (acm->susp_count) {
- acm->delayed_wb = wb;
- schedule_work(&acm->waker);
+ if (!acm->delayed_wb)
+ acm->delayed_wb = wb;
+ else
+ usb_autopm_put_interface_async(acm->control);
spin_unlock_irqrestore(&acm->write_lock, flags);
return 0; /* A white lie */
}
@@ -424,7 +428,6 @@ next_buffer:
throttled = acm->throttle;
spin_unlock_irqrestore(&acm->throttle_lock, flags);
if (!throttled) {
- tty_buffer_request_room(tty, buf->size);
tty_insert_flip_string(tty, buf->base, buf->size);
tty_flip_buffer_push(tty);
} else {
@@ -534,23 +537,6 @@ static void acm_softint(struct work_struct *work)
tty_kref_put(tty);
}
-static void acm_waker(struct work_struct *waker)
-{
- struct acm *acm = container_of(waker, struct acm, waker);
- int rv;
-
- rv = usb_autopm_get_interface(acm->control);
- if (rv < 0) {
- dev_err(&acm->dev->dev, "Autopm failure in %s\n", __func__);
- return;
- }
- if (acm->delayed_wb) {
- acm_start_wb(acm, acm->delayed_wb);
- acm->delayed_wb = NULL;
- }
- usb_autopm_put_interface(acm->control);
-}
-
/*
* TTY handlers
*/
@@ -566,7 +552,7 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
acm = acm_table[tty->index];
if (!acm || !acm->dev)
- goto err_out;
+ goto out;
else
rv = 0;
@@ -582,8 +568,9 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
mutex_lock(&acm->mutex);
if (acm->port.count++) {
+ mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
- goto done;
+ goto out;
}
acm->ctrlurb->dev = acm->dev;
@@ -612,18 +599,18 @@ static int acm_tty_open(struct tty_struct *tty, struct file *filp)
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
tasklet_schedule(&acm->urb_task);
-done:
+
mutex_unlock(&acm->mutex);
-err_out:
+out:
mutex_unlock(&open_mutex);
return rv;
full_bailout:
usb_kill_urb(acm->ctrlurb);
bail_out:
- usb_autopm_put_interface(acm->control);
acm->port.count--;
mutex_unlock(&acm->mutex);
+ usb_autopm_put_interface(acm->control);
early_bail:
mutex_unlock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
@@ -1023,7 +1010,7 @@ static int acm_probe(struct usb_interface *intf,
case USB_CDC_CALL_MANAGEMENT_TYPE:
call_management_function = buffer[3];
call_interface_num = buffer[4];
- if ((call_management_function & 3) != 3)
+ if ( (quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
break;
default:
@@ -1178,7 +1165,6 @@ made_compressed_probe:
acm->urb_task.func = acm_rx_tasklet;
acm->urb_task.data = (unsigned long) acm;
INIT_WORK(&acm->work, acm_softint);
- INIT_WORK(&acm->waker, acm_waker);
init_waitqueue_head(&acm->drain_wait);
spin_lock_init(&acm->throttle_lock);
spin_lock_init(&acm->write_lock);
@@ -1343,7 +1329,6 @@ static void stop_data_traffic(struct acm *acm)
tasklet_enable(&acm->urb_task);
cancel_work_sync(&acm->work);
- cancel_work_sync(&acm->waker);
}
static void acm_disconnect(struct usb_interface *intf)
@@ -1435,6 +1420,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
static int acm_resume(struct usb_interface *intf)
{
struct acm *acm = usb_get_intfdata(intf);
+ struct acm_wb *wb;
int rv = 0;
int cnt;
@@ -1449,6 +1435,21 @@ static int acm_resume(struct usb_interface *intf)
mutex_lock(&acm->mutex);
if (acm->port.count) {
rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
+
+ spin_lock_irq(&acm->write_lock);
+ if (acm->delayed_wb) {
+ wb = acm->delayed_wb;
+ acm->delayed_wb = NULL;
+ spin_unlock_irq(&acm->write_lock);
+ acm_start_wb(acm, acm->delayed_wb);
+ } else {
+ spin_unlock_irq(&acm->write_lock);
+ }
+
+ /*
+ * delayed error checking because we must
+ * do the write path at all cost
+ */
if (rv < 0)
goto err_out;
@@ -1460,6 +1461,23 @@ err_out:
return rv;
}
+static int acm_reset_resume(struct usb_interface *intf)
+{
+ struct acm *acm = usb_get_intfdata(intf);
+ struct tty_struct *tty;
+
+ mutex_lock(&acm->mutex);
+ if (acm->port.count) {
+ tty = tty_port_tty_get(&acm->port);
+ if (tty) {
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ }
+ mutex_unlock(&acm->mutex);
+ return acm_resume(intf);
+}
+
#endif /* CONFIG_PM */
#define NOKIA_PCSUITE_ACM_INFO(x) \
@@ -1471,7 +1489,7 @@ err_out:
* USB driver structure.
*/
-static struct usb_device_id acm_ids[] = {
+static const struct usb_device_id acm_ids[] = {
/* quirky and broken devices */
{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
@@ -1576,6 +1594,11 @@ static struct usb_device_id acm_ids[] = {
/* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */
+ /* Support Lego NXT using pbLua firmware */
+ { USB_DEVICE(0x0694, 0xff00),
+ .driver_info = NOT_A_MODEM,
+ },
+
/* control interfaces with various AT-command sets */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_ACM_PROTO_AT_V25TER) },
@@ -1602,6 +1625,7 @@ static struct usb_driver acm_driver = {
#ifdef CONFIG_PM
.suspend = acm_suspend,
.resume = acm_resume,
+ .reset_resume = acm_reset_resume,
#endif
.id_table = acm_ids,
#ifdef CONFIG_PM
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index c4a0ee8..4a8e87e 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -112,7 +112,6 @@ struct acm {
struct mutex mutex;
struct usb_cdc_line_coding line; /* bits, stop, parity */
struct work_struct work; /* work queue entry for line discipline waking up */
- struct work_struct waker;
wait_queue_head_t drain_wait; /* close processing */
struct tasklet_struct urb_task; /* rx processing */
spinlock_t throttle_lock; /* synchronize throtteling and read callback */
@@ -137,3 +136,4 @@ struct acm {
#define NO_UNION_NORMAL 1
#define SINGLE_RX_URB 2
#define NO_CAP_LINE 4
+#define NOT_A_MODEM 8
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 3e564bf..18aafcb 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -31,7 +31,7 @@
#define DRIVER_AUTHOR "Oliver Neukum"
#define DRIVER_DESC "USB Abstract Control Model driver for USB WCM Device Management"
-static struct usb_device_id wdm_ids[] = {
+static const struct usb_device_id wdm_ids[] = {
{
.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
USB_DEVICE_ID_MATCH_INT_SUBCLASS,
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 9bc112e..93b5f85 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -163,7 +163,6 @@ struct usblp {
unsigned char used; /* True if open */
unsigned char present; /* True if not disconnected */
unsigned char bidir; /* interface is bidirectional */
- unsigned char sleeping; /* interface is suspended */
unsigned char no_paper; /* Paper Out happened */
unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */
/* first 2 bytes are (big-endian) length */
@@ -191,7 +190,6 @@ static void usblp_dump(struct usblp *usblp) {
dbg("quirks=%d", usblp->quirks);
dbg("used=%d", usblp->used);
dbg("bidir=%d", usblp->bidir);
- dbg("sleeping=%d", usblp->sleeping);
dbg("device_id_string=\"%s\"",
usblp->device_id_string ?
usblp->device_id_string + 2 :
@@ -376,7 +374,7 @@ static int usblp_check_status(struct usblp *usblp, int err)
static int handle_bidir (struct usblp *usblp)
{
- if (usblp->bidir && usblp->used && !usblp->sleeping) {
+ if (usblp->bidir && usblp->used) {
if (usblp_submit_read(usblp) < 0)
return -EIO;
}
@@ -503,11 +501,6 @@ static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
goto done;
}
- if (usblp->sleeping) {
- retval = -ENODEV;
- goto done;
- }
-
dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd),
_IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd) );
@@ -914,8 +907,6 @@ static int usblp_wtest(struct usblp *usblp, int nonblock)
return 0;
}
spin_unlock_irqrestore(&usblp->lock, flags);
- if (usblp->sleeping)
- return -ENODEV;
if (nonblock)
return -EAGAIN;
return 1;
@@ -968,8 +959,6 @@ static int usblp_rtest(struct usblp *usblp, int nonblock)
return 0;
}
spin_unlock_irqrestore(&usblp->lock, flags);
- if (usblp->sleeping)
- return -ENODEV;
if (nonblock)
return -EAGAIN;
return 1;
@@ -1377,12 +1366,10 @@ static void usblp_disconnect(struct usb_interface *intf)
mutex_unlock (&usblp_mutex);
}
-static int usblp_suspend (struct usb_interface *intf, pm_message_t message)
+static int usblp_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usblp *usblp = usb_get_intfdata (intf);
- /* we take no more IO */
- usblp->sleeping = 1;
usblp_unlink_urbs(usblp);
#if 0 /* XXX Do we want this? What if someone is reading, should we fail? */
/* not strictly necessary, but just in case */
@@ -1393,18 +1380,17 @@ static int usblp_suspend (struct usb_interface *intf, pm_message_t message)
return 0;
}
-static int usblp_resume (struct usb_interface *intf)
+static int usblp_resume(struct usb_interface *intf)
{
struct usblp *usblp = usb_get_intfdata (intf);
int r;
- usblp->sleeping = 0;
r = handle_bidir (usblp);
return r;
}
-static struct usb_device_id usblp_ids [] = {
+static const struct usb_device_id usblp_ids[] = {
{ USB_DEVICE_INFO(7, 1, 1) },
{ USB_DEVICE_INFO(7, 1, 2) },
{ USB_DEVICE_INFO(7, 1, 3) },
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 7c5f4e3..8588c09 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -48,7 +48,7 @@
*/
#define USBTMC_MAX_READS_TO_CLEAR_BULK_IN 100
-static struct usb_device_id usbtmc_devices[] = {
+static const struct usb_device_id usbtmc_devices[] = {
{ USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 0), },
{ USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 1), },
{ 0, } /* terminating entry */
generated by cgit v0.10.2 at 2024-08-19 01:54:10 (GMT)