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USB: mos7840: fix DMA buffers on stack and endianess bugs 

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 23:01:55 +01:00 committed by Greg Kroah-Hartman
parent eb771e2c65
commit 9e221a35f8
1 changed files with 18 additions and 4 deletions
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22
drivers/usb/serial/mos7840.c
View File

@ -283,12 +283,19 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
{
struct usb_device *dev = port->serial->dev;
int ret = 0;
u8 *buf;
buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
*val = buf[0];
dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
*val = (*val) & 0x00ff;
kfree(buf);
return ret;
}
@ -341,6 +348,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
struct usb_device *dev = port->serial->dev;
int ret = 0;
__u16 Wval;
u8 *buf;
buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* dbg("application number is %4x",
(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
@ -364,9 +376,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
}
}
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
MOS_WDR_TIMEOUT);
*val = (*val) & 0x00ff;
*val = buf[0];
kfree(buf);
return ret;
}