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authorGreg Kroah-Hartman <gregkh@suse.de>2008-12-10 16:00:30 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 10:00:06 -0800
commit50de36f7af3b1d791c402478210790c582126fe5 (patch)
tree78d3353450be45315bb2ffa1cd7c664c26458c73
parent6013bbbab0dcbc43bcf9dd70beeab2a0b1ec5ea7 (diff)
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USB: serial: fix up urb->status usage
Some of the usb-serial drivers are starting to use urb->status in ways they should not be doing. This fixes up some of them to prevent that. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/serial/digi_acceleport.c28
-rw-r--r--drivers/usb/serial/garmin_gps.c2
-rw-r--r--drivers/usb/serial/iuu_phoenix.c38
-rw-r--r--drivers/usb/serial/mos7840.c38
-rw-r--r--drivers/usb/serial/option.c7
-rw-r--r--drivers/usb/serial/spcp8x5.c20
6 files changed, 68 insertions, 65 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 69f84f0ea6f..38ba4ea8b6b 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -635,8 +635,7 @@ static int digi_write_oob_command(struct usb_serial_port *port,
spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
while (count > 0) {
- while (oob_port->write_urb->status == -EINPROGRESS
- || oob_priv->dp_write_urb_in_use) {
+ while (oob_priv->dp_write_urb_in_use) {
cond_wait_interruptible_timeout_irqrestore(
&oob_port->write_wait, DIGI_RETRY_TIMEOUT,
&oob_priv->dp_port_lock, flags);
@@ -699,9 +698,8 @@ static int digi_write_inb_command(struct usb_serial_port *port,
spin_lock_irqsave(&priv->dp_port_lock, flags);
while (count > 0 && ret == 0) {
- while ((port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use)
- && time_before(jiffies, timeout)) {
+ while (priv->dp_write_urb_in_use &&
+ time_before(jiffies, timeout)) {
cond_wait_interruptible_timeout_irqrestore(
&port->write_wait, DIGI_RETRY_TIMEOUT,
&priv->dp_port_lock, flags);
@@ -779,8 +777,7 @@ static int digi_set_modem_signals(struct usb_serial_port *port,
spin_lock_irqsave(&oob_priv->dp_port_lock, flags);
spin_lock(&port_priv->dp_port_lock);
- while (oob_port->write_urb->status == -EINPROGRESS ||
- oob_priv->dp_write_urb_in_use) {
+ while (oob_priv->dp_write_urb_in_use) {
spin_unlock(&port_priv->dp_port_lock);
cond_wait_interruptible_timeout_irqrestore(
&oob_port->write_wait, DIGI_RETRY_TIMEOUT,
@@ -1168,12 +1165,10 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
/* be sure only one write proceeds at a time */
/* there are races on the port private buffer */
- /* and races to check write_urb->status */
spin_lock_irqsave(&priv->dp_port_lock, flags);
/* wait for urb status clear to submit another urb */
- if (port->write_urb->status == -EINPROGRESS ||
- priv->dp_write_urb_in_use) {
+ if (priv->dp_write_urb_in_use) {
/* buffer data if count is 1 (probably put_char) if possible */
if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) {
priv->dp_out_buf[priv->dp_out_buf_len++] = *buf;
@@ -1236,7 +1231,7 @@ static void digi_write_bulk_callback(struct urb *urb)
int ret = 0;
int status = urb->status;
- dbg("digi_write_bulk_callback: TOP, urb->status=%d", status);
+ dbg("digi_write_bulk_callback: TOP, status=%d", status);
/* port and serial sanity check */
if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) {
@@ -1266,8 +1261,7 @@ static void digi_write_bulk_callback(struct urb *urb)
/* try to send any buffered data on this port, if it is open */
spin_lock(&priv->dp_port_lock);
priv->dp_write_urb_in_use = 0;
- if (port->port.count && port->write_urb->status != -EINPROGRESS
- && priv->dp_out_buf_len > 0) {
+ if (port->port.count && priv->dp_out_buf_len > 0) {
*((unsigned char *)(port->write_urb->transfer_buffer))
= (unsigned char)DIGI_CMD_SEND_DATA;
*((unsigned char *)(port->write_urb->transfer_buffer) + 1)
@@ -1305,8 +1299,7 @@ static int digi_write_room(struct tty_struct *tty)
spin_lock_irqsave(&priv->dp_port_lock, flags);
- if (port->write_urb->status == -EINPROGRESS ||
- priv->dp_write_urb_in_use)
+ if (priv->dp_write_urb_in_use)
room = 0;
else
room = port->bulk_out_size - 2 - priv->dp_out_buf_len;
@@ -1322,8 +1315,7 @@ static int digi_chars_in_buffer(struct tty_struct *tty)
struct usb_serial_port *port = tty->driver_data;
struct digi_port *priv = usb_get_serial_port_data(port);
- if (port->write_urb->status == -EINPROGRESS
- || priv->dp_write_urb_in_use) {
+ if (priv->dp_write_urb_in_use) {
dbg("digi_chars_in_buffer: port=%d, chars=%d",
priv->dp_port_num, port->bulk_out_size - 2);
/* return(port->bulk_out_size - 2); */
@@ -1702,7 +1694,7 @@ static int digi_read_inb_callback(struct urb *urb)
/* short/multiple packet check */
if (urb->actual_length != len + 2) {
dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, "
- "urb->status=%d, port=%d, opcode=%d, len=%d, "
+ "status=%d, port=%d, opcode=%d, len=%d, "
"actual_length=%d, status=%d\n", __func__, status,
priv->dp_port_num, opcode, len, urb->actual_length,
port_status);
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 8e6a66e38db..a26a0e2cdb4 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1056,7 +1056,7 @@ static void garmin_write_bulk_callback(struct urb *urb)
if (status) {
dbg("%s - nonzero write bulk status received: %d",
- __func__, urb->status);
+ __func__, status);
spin_lock_irqsave(&garmin_data_p->lock, flags);
garmin_data_p->flags |= CLEAR_HALT_REQUIRED;
spin_unlock_irqrestore(&garmin_data_p->lock, flags);
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index e320972cb22..2314c6ae4fc 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -190,10 +190,12 @@ static void iuu_rxcmd(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
int result;
+ int status = urb->status;
+
dbg("%s - enter", __func__);
- if (urb->status) {
- dbg("%s - urb->status = %d", __func__, urb->status);
+ if (status) {
+ dbg("%s - status = %d", __func__, status);
/* error stop all */
return;
}
@@ -245,10 +247,12 @@ static void iuu_update_status_callback(struct urb *urb)
struct usb_serial_port *port = urb->context;
struct iuu_private *priv = usb_get_serial_port_data(port);
u8 *st;
+ int status = urb->status;
+
dbg("%s - enter", __func__);
- if (urb->status) {
- dbg("%s - urb->status = %d", __func__, urb->status);
+ if (status) {
+ dbg("%s - status = %d", __func__, status);
/* error stop all */
return;
}
@@ -274,9 +278,9 @@ static void iuu_status_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
int result;
- dbg("%s - enter", __func__);
+ int status = urb->status;
- dbg("%s - urb->status = %d", __func__, urb->status);
+ dbg("%s - status = %d", __func__, status);
usb_fill_bulk_urb(port->read_urb, port->serial->dev,
usb_rcvbulkpipe(port->serial->dev,
port->bulk_in_endpointAddress),
@@ -618,11 +622,12 @@ static void read_buf_callback(struct urb *urb)
struct usb_serial_port *port = urb->context;
unsigned char *data = urb->transfer_buffer;
struct tty_struct *tty;
- dbg("%s - urb->status = %d", __func__, urb->status);
+ int status = urb->status;
- if (urb->status) {
- dbg("%s - urb->status = %d", __func__, urb->status);
- if (urb->status == -EPROTO) {
+ dbg("%s - status = %d", __func__, status);
+
+ if (status) {
+ if (status == -EPROTO) {
/* reschedule needed */
}
return;
@@ -695,7 +700,7 @@ static void iuu_uart_read_callback(struct urb *urb)
struct usb_serial_port *port = urb->context;
struct iuu_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
- int status;
+ int status = urb->status;
int error = 0;
int len = 0;
unsigned char *data = urb->transfer_buffer;
@@ -703,8 +708,8 @@ static void iuu_uart_read_callback(struct urb *urb)
dbg("%s - enter", __func__);
- if (urb->status) {
- dbg("%s - urb->status = %d", __func__, urb->status);
+ if (status) {
+ dbg("%s - status = %d", __func__, status);
/* error stop all */
return;
}
@@ -782,12 +787,11 @@ static void read_rxcmd_callback(struct urb *urb)
{
struct usb_serial_port *port = urb->context;
int result;
- dbg("%s - enter", __func__);
+ int status = urb->status;
- dbg("%s - urb->status = %d", __func__, urb->status);
+ dbg("%s - status = %d", __func__, status);
- if (urb->status) {
- dbg("%s - urb->status = %d", __func__, urb->status);
+ if (status) {
/* error stop all */
return;
}
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 96a8c771321..2c20e88a91b 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -214,6 +214,7 @@ struct moschip_port {
spinlock_t pool_lock;
struct urb *write_urb_pool[NUM_URBS];
char busy[NUM_URBS];
+ bool read_urb_busy;
};
@@ -679,26 +680,30 @@ static void mos7840_bulk_in_callback(struct urb *urb)
struct tty_struct *tty;
int status = urb->status;
- if (status) {
- dbg("nonzero read bulk status received: %d", status);
- return;
- }
-
mos7840_port = urb->context;
if (!mos7840_port) {
dbg("%s", "NULL mos7840_port pointer \n");
+ mos7840_port->read_urb_busy = false;
+ return;
+ }
+
+ if (status) {
+ dbg("nonzero read bulk status received: %d", status);
+ mos7840_port->read_urb_busy = false;
return;
}
port = (struct usb_serial_port *)mos7840_port->port;
if (mos7840_port_paranoia_check(port, __func__)) {
dbg("%s", "Port Paranoia failed \n");
+ mos7840_port->read_urb_busy = false;
return;
}
serial = mos7840_get_usb_serial(port, __func__);
if (!serial) {
dbg("%s\n", "Bad serial pointer ");
+ mos7840_port->read_urb_busy = false;
return;
}
@@ -725,17 +730,19 @@ static void mos7840_bulk_in_callback(struct urb *urb)
if (!mos7840_port->read_urb) {
dbg("%s", "URB KILLED !!!\n");
+ mos7840_port->read_urb_busy = false;
return;
}
mos7840_port->read_urb->dev = serial->dev;
+ mos7840_port->read_urb_busy = true;
retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
if (retval) {
- dbg(" usb_submit_urb(read bulk) failed, retval = %d",
- retval);
+ dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
+ mos7840_port->read_urb_busy = false;
}
}
@@ -1055,10 +1062,12 @@ static int mos7840_open(struct tty_struct *tty,
dbg("mos7840_open: bulkin endpoint is %d\n",
port->bulk_in_endpointAddress);
+ mos7840_port->read_urb_busy = true;
response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
if (response) {
dev_err(&port->dev, "%s - Error %d submitting control urb\n",
__func__, response);
+ mos7840_port->read_urb_busy = false;
}
/* initialize our wait queues */
@@ -1227,6 +1236,7 @@ static void mos7840_close(struct tty_struct *tty,
if (mos7840_port->read_urb) {
dbg("%s", "Shutdown bulk read\n");
usb_kill_urb(mos7840_port->read_urb);
+ mos7840_port->read_urb_busy = false;
}
if ((&mos7840_port->control_urb)) {
dbg("%s", "Shutdown control read\n");
@@ -2043,14 +2053,14 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
Data = 0x0c;
mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
- if (mos7840_port->read_urb->status != -EINPROGRESS) {
+ if (mos7840_port->read_urb_busy == false) {
mos7840_port->read_urb->dev = serial->dev;
-
+ mos7840_port->read_urb_busy = true;
status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
-
if (status) {
- dbg(" usb_submit_urb(read bulk) failed, status = %d",
+ dbg("usb_submit_urb(read bulk) failed, status = %d",
status);
+ mos7840_port->read_urb_busy = false;
}
}
wake_up(&mos7840_port->delta_msr_wait);
@@ -2117,12 +2127,14 @@ static void mos7840_set_termios(struct tty_struct *tty,
return;
}
- if (mos7840_port->read_urb->status != -EINPROGRESS) {
+ if (mos7840_port->read_urb_busy == false) {
mos7840_port->read_urb->dev = serial->dev;
+ mos7840_port->read_urb_busy = true;
status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
if (status) {
- dbg(" usb_submit_urb(read bulk) failed, status = %d",
+ dbg("usb_submit_urb(read bulk) failed, status = %d",
status);
+ mos7840_port->read_urb_busy = false;
}
}
return;
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 809697b3c7f..4c9497d05d1 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -654,10 +654,6 @@ static int option_write(struct tty_struct *tty, struct usb_serial_port *port,
usb_unlink_urb(this_urb);
continue;
}
- if (this_urb->status != 0)
- dbg("usb_write %p failed (err=%d)",
- this_urb, this_urb->status);
-
dbg("%s: endpoint %d buf %d", __func__,
usb_pipeendpoint(this_urb->pipe), i);
@@ -669,8 +665,7 @@ static int option_write(struct tty_struct *tty, struct usb_serial_port *port,
err = usb_submit_urb(this_urb, GFP_ATOMIC);
if (err) {
dbg("usb_submit_urb %p (write bulk) failed "
- "(%d, has %d)", this_urb,
- err, this_urb->status);
+ "(%d)", this_urb, err);
clear_bit(i, &portdata->out_busy);
continue;
}
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index a65bc2bd8e7..5e7528cc81a 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -709,21 +709,20 @@ static void spcp8x5_read_bulk_callback(struct urb *urb)
unsigned char *data = urb->transfer_buffer;
unsigned long flags;
int i;
- int result;
- u8 status = 0;
+ int result = urb->status;
+ u8 status;
char tty_flag;
- dev_dbg(&port->dev, "start, urb->status = %d, "
- "urb->actual_length = %d\n,", urb->status, urb->actual_length);
+ dev_dbg(&port->dev, "start, result = %d, urb->actual_length = %d\n,",
+ result, urb->actual_length);
/* check the urb status */
- if (urb->status) {
+ if (result) {
if (!port->port.count)
return;
- if (urb->status == -EPROTO) {
+ if (result == -EPROTO) {
/* spcp8x5 mysteriously fails with -EPROTO */
/* reschedule the read */
- urb->status = 0;
urb->dev = port->serial->dev;
result = usb_submit_urb(urb , GFP_ATOMIC);
if (result)
@@ -833,8 +832,9 @@ static void spcp8x5_write_bulk_callback(struct urb *urb)
struct usb_serial_port *port = urb->context;
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
int result;
+ int status = urb->status;
- switch (urb->status) {
+ switch (status) {
case 0:
/* success */
break;
@@ -843,14 +843,14 @@ static void spcp8x5_write_bulk_callback(struct urb *urb)
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dev_dbg(&port->dev, "urb shutting down with status: %d\n",
- urb->status);
+ status);
priv->write_urb_in_use = 0;
return;
default:
/* error in the urb, so we have to resubmit it */
dbg("%s - Overflow in write", __func__);
dbg("%s - nonzero write bulk status received: %d",
- __func__, urb->status);
+ __func__, status);
port->write_urb->transfer_buffer_length = 1;
port->write_urb->dev = port->serial->dev;
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);