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USB: oti6858: fix DMA buffer on stack 

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2009-12-28 23:01:56 +01:00 committed by Greg Kroah-Hartman
parent 9e221a35f8
commit d2126326bd
1 changed files with 10 additions and 3 deletions
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13
drivers/usb/serial/oti6858.c
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@ -302,7 +302,7 @@ void send_data(struct work_struct *work)
struct usb_serial_port *port = priv->port;
int count = 0, result;
unsigned long flags;
unsigned char allow;
u8 *allow;
dbg("%s(port = %d)", __func__, port->number);
@ -321,13 +321,20 @@ void send_data(struct work_struct *work)
count = port->bulk_out_size;
if (count != 0) {
allow = kmalloc(1, GFP_KERNEL);
if (!allow) {
dev_err(&port->dev, "%s(): kmalloc failed\n",
__func__);
return;
}
result = usb_control_msg(port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
OTI6858_REQ_T_CHECK_TXBUFF,
OTI6858_REQ_CHECK_TXBUFF,
count, 0, &allow, 1, 100);
if (result != 1 || allow != 0)
count, 0, allow, 1, 100);
if (result != 1 || *allow != 0)
count = 0;
kfree(allow);
}
if (count == 0) {