lkml.org 
[lkml]   [2010]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] identify firmware version
On 09/01/2010 11:48 AM, Rafi Rubin wrote:
> --- a/drivers/hid/hid-ntrig.c
> +++ b/drivers/hid/hid-ntrig.c
> @@ -90,6 +90,26 @@ struct ntrig_data {
> };
>
>
> +/*
> + * This function converts the 4 byte raw firmware code into
> + * a string containing 5 comma separated numbers.
> + */
> +static int ntrig_version_string(unsigned char *raw, char *buf)
> +{
> + __u8 a = (raw[1] & 0b00001110) >> 1;
> + __u8 b = (raw[0] & 0b00111100) >> 2;
> + __u8 c = ((raw[0] & 0b00000011) << 3) | ((raw[3] & 0b11100000) >> 5);
> + __u8 d = ((raw[3] & 0b00000111) << 3) | ((raw[2] & 0b11100000) >> 5);
> + __u8 e = raw[2] & 0b00000111;

This won't compile with gcc 3.4 which we still support. Maybe time to
kill the support?

...
> @@ -848,10 +871,39 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
> if (report)
> usbhid_submit_report(hdev, report, USB_DIR_OUT);
>
> + data = kmalloc(8, GFP_KERNEL);
> + if (!data) {
> + ret = -ENOMEM;
> + goto err_free;
> + }
> +
> + ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
> + USB_REQ_CLEAR_FEATURE,
> + USB_TYPE_CLASS | USB_RECIP_INTERFACE |
> + USB_DIR_IN,
> + 0x30c, 1, data, 8,
> + USB_CTRL_SET_TIMEOUT);
> +
> + if (ret == 8) {
> + buf = kmalloc(20, GFP_KERNEL);
> + if (!buf) {
> + ret = -ENOMEM;
> + goto err_free_data;
> + }
> +
> + ret = ntrig_version_string(&data[2], buf);
> +
> + dev_info(&hdev->dev,
> + "Firmware version: %s (%02x%02x %02x%02x)\n",
> + buf, data[2], data[3], data[4], data[5]);
> + }
> +
> ret = sysfs_create_group(&hdev->dev.kobj,
> &ntrig_attribute_group);
>
> return 0;

Two leaks here.

> +err_free_data:
> + kfree(data);
> err_free:
> kfree(nd);
> return ret;


--
js


\
 
 \ /
  Last update: 2010-09-01 22:15    [from the cache]
©2003-2011 Jasper Spaans