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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>
hifive-unleashed-5.1
Greg Kroah-Hartman 2008-12-10 16:00:30 -08:00
parent 6013bbbab0
commit 50de36f7af
6 changed files with 68 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/usb/serial/digi_acceleport.c
View File

@ -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);

2
drivers/usb/serial/garmin_gps.c
View File

@ -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);

38
drivers/usb/serial/iuu_phoenix.c
View File

@ -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;
}

38
drivers/usb/serial/mos7840.c
View File

@ -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;

7
drivers/usb/serial/option.c
View File

@ -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;
}

20
drivers/usb/serial/spcp8x5.c
View File

@ -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);