From: Johan Hovold <jhovold@xxxxxxxxx>
Cc: Lonnie Mendez <dignome@xxxxxxxxx>
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/serial/cypress_m8.c | 31 +++++++++++++++++--------------
1 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 60c2002..1ce1a3a 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -344,7 +344,8 @@ static int cypress_serial_control(struct tty_struct *tty,
{
int new_baudrate = 0, retval = 0, tries = 0;
struct cypress_private *priv;
- __u8 feature_buffer[5];
+ u8 *feature_buffer;
+ const unsigned int feature_len = 5;
unsigned long flags;
dbg("%s", __func__);
@@ -354,6 +355,10 @@ static int cypress_serial_control(struct tty_struct *tty,
if (!priv->comm_is_ok)
return -ENODEV;
+ feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL);
+ if (!feature_buffer)
+ return -ENOMEM;
+
switch (cypress_request_type) {
case CYPRESS_SET_CONFIG:
/* 0 means 'Hang up' so doesn't change the true bit rate */
@@ -370,7 +375,6 @@ static int cypress_serial_control(struct tty_struct *tty,
dbg("%s - baud rate is being sent as %d",
__func__, new_baudrate);
- memset(feature_buffer, 0, sizeof(feature_buffer));
/* fill the feature_buffer with new configuration */
*((u_int32_t *)feature_buffer) = new_baudrate;
feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */
@@ -394,15 +398,15 @@ static int cypress_serial_control(struct tty_struct *tty,
HID_REQ_SET_REPORT,
USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
0x0300, 0, feature_buffer,
- sizeof(feature_buffer), 500);
+ feature_len, 500);
if (tries++ >= 3)
break;
- } while (retval != sizeof(feature_buffer) &&
+ } while (retval != feature_len &&
retval != -ENODEV);
- if (retval != sizeof(feature_buffer)) {
+ if (retval != feature_len) {
dev_err(&port->dev, "%s - failed sending serial "
"line settings - %d\n", __func__, retval);
cypress_set_dead(port);
@@ -422,30 +426,28 @@ static int cypress_serial_control(struct tty_struct *tty,
/* Not implemented for this device,
and if we try to do it we're likely
to crash the hardware. */
- return -ENOTTY;
+ retval = -ENOTTY;
+ goto out;
}
dbg("%s - retreiving serial line settings", __func__);
- /* set initial values in feature buffer */
- memset(feature_buffer, 0, sizeof(feature_buffer));
-
do {
retval = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
HID_REQ_GET_REPORT,
USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
0x0300, 0, feature_buffer,
- sizeof(feature_buffer), 500);
+ feature_len, 500);
if (tries++ >= 3)
break;
- } while (retval != sizeof(feature_buffer)
+ } while (retval != feature_len
&& retval != -ENODEV);
- if (retval != sizeof(feature_buffer)) {
+ if (retval != feature_len) {
dev_err(&port->dev, "%s - failed to retrieve serial "
"line settings - %d\n", __func__, retval);
cypress_set_dead(port);
- return retval;
+ goto out;
} else {
spin_lock_irqsave(&priv->lock, flags);
/* store the config in one byte, and later
@@ -458,7 +460,8 @@ static int cypress_serial_control(struct tty_struct *tty,
spin_lock_irqsave(&priv->lock, flags);
++priv->cmd_count;
spin_unlock_irqrestore(&priv->lock, flags);
-
+out:
+ kfree(feature_buffer);
return retval;
} /* cypress_serial_control */
--
1.7.0.1
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