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| author | Johan Hovold <jhovold@gmail.com> | 2009-12-29 01:01:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-03 01:53:56 +0300 |
| commit | eb771e2c6507e0a317e576a3147252ebcb64035a (patch) | |
| tree | 0ac79e2e623c69e5f9143ad61e88f328efec39c3 | |
| parent | abf492e7b3ae74873688cf9960283853a3054471 (diff) | |
| download | linux-eb771e2c6507e0a317e576a3147252ebcb64035a.tar.xz | |
USB: mos7720: fix DMA buffers on stack and clean up send_mos_cmd
Change data-argument type from (void *) to (u8 *) to prevent endianess
problems.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | 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 763e32a44be0..e081dc0d21de 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); |