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WUSB: correct format of wusb_chid sysfs file 

Make the wusb_chid sysfs file match the ABI documentation.

Print all zeros if the WUSB host is stopped (instead of an empty file)
and end the file with a newline.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Vrabel 2009-04-08 17:36:30 +00:00 committed by Greg Kroah-Hartman
parent 5936ac7f93
commit fca10c81d9
1 changed files with 12 additions and 14 deletions
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26
drivers/usb/wusbcore/wusbhc.c
View File

@ -88,33 +88,31 @@ static DEVICE_ATTR(wusb_trust_timeout, 0644, wusb_trust_timeout_show,
wusb_trust_timeout_store);
/*
* Show & store the current WUSB CHID
* Show the current WUSB CHID.
*/
static ssize_t wusb_chid_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev);
const struct wusb_ckhdid *chid;
ssize_t result = 0;
if (wusbhc->wuie_host_info != NULL)
result += ckhdid_printf(buf, PAGE_SIZE,
&wusbhc->wuie_host_info->CHID);
chid = &wusbhc->wuie_host_info->CHID;
else
chid = &wusb_ckhdid_zero;
result += ckhdid_printf(buf, PAGE_SIZE, chid);
result += sprintf(buf + result, "\n");
return result;
}
/*
* Store a new CHID
* Store a new CHID.
*
* This will (FIXME) trigger many changes.
*
* - Send an all zeros CHID and it will stop the controller
* - Send a non-zero CHID and it will start it
* (unless it was started, it will just change the CHID,
* diconnecting all devices first).
*
* So first we scan the MMC we are sent and then we act on it. We
* read it in the same format as we print it, an ASCII string of 16
* hex bytes.
* - Write an all zeros CHID and it will stop the controller
* - Write a non-zero CHID and it will start it.
*
* See wusbhc_chid_set() for more info.
*/