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Subject[PATCH 09/13] USB: mos7720: fix DMA buffers on stack and clean up send_mos_cmd
Date
Change data-argument type from (void *) to (u8 *) to prevent endianess
problems.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
---
drivers/usb/serial/mos7720.c | 34 +++++++++++++++++-----------------
1 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 763e32a..e081dc0 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -275,13 +275,11 @@ static void mos7720_bulk_out_data_callback(struct urb *urb)
* this function will be used for sending command to device
*/
static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
- __u16 index, void *data)
+ __u16 index, u8 *data)
{
int status;
- unsigned int pipe;
+ u8 *buf;
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
- __u8 requesttype;
- __u16 size = 0x0000;

if (value < MOS_MAX_PORT) {
if (product == MOSCHIP_DEVICE_ID_7715)
@@ -298,21 +296,23 @@ static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
}

if (request == MOS_WRITE) {
- request = (__u8)MOS_WRITE;
- requesttype = (__u8)0x40;
- value = value + (__u16)*((unsigned char *)data);
- data = NULL;
- pipe = usb_sndctrlpipe(serial->dev, 0);
+ value = value + *data;
+ status = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0), MOS_WRITE,
+ 0x40, value, index, NULL, 0, MOS_WDR_TIMEOUT);
} else {
- request = (__u8)MOS_READ;
- requesttype = (__u8)0xC0;
- size = 0x01;
- pipe = usb_rcvctrlpipe(serial->dev, 0);
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf) {
+ status = -ENOMEM;
+ goto out;
+ }
+ status = usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev, 0), MOS_READ,
+ 0xc0, value, index, buf, 1, MOS_WDR_TIMEOUT);
+ *data = *buf;
+ kfree(buf);
}
-
- status = usb_control_msg(serial->dev, pipe, request, requesttype,
- value, index, data, size, MOS_WDR_TIMEOUT);
-
+out:
if (status < 0)
dbg("Command Write failed Value %x index %x\n", value, index);

--
1.6.6


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