On Tue, 30 Jan 2007 21:30:29 +0000
Simon Arlott <[email protected]> wrote:
> +static int cxacru_proc_read(struct usbatm_data *usbatm_instance,
> + struct atm_dev *atm_dev, loff_t * pos, char *page)
> +{
> + struct cxacru_data *instance = usbatm_instance->driver_data;
> + u32 *cxinf = instance->cxinf_status;
> + int left = *pos;
> +
> + if (!left--)
> + return sprintf(page, "# %s\n", usbatm_instance->description);
> +
> + if (!left--) {
> + if (cxinf[CXINF_LINE_STATUS] == 5) {
> + return sprintf(page, "# UP %u/%u\n",
> + cxinf[CXINF_DOWNSTREAM_RATE],
> + cxinf[CXINF_UPSTREAM_RATE]);
> + } else {
> + return sprintf(page, "# DOWN\n");
> + }
> + }
hm, how well-tested was this proc interface? The pread() and lseek()
behaviour might be strange.
I guess as long as it doesn't oops, hang or anything like that then it'll
be OK. Anyone who does anything apart from a single big-fat-read from a
procfile has a good chance of getting into trouble :(
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