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authorDavid Vrabel <david.vrabel@csr.com>2009-04-08 17:36:30 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2009-04-17 10:50:29 -0700
commitfca10c81d99ff9956179058460dfddc0418f3902 (patch)
treece940de5eb0b580d82cf3d9e4262a45bcc7f7598 /drivers/usb
parent5936ac7f93965931c508e1928d142076998ce65d (diff)
downloadblackbird-op-linux-fca10c81d99ff9956179058460dfddc0418f3902.tar.gz
blackbird-op-linux-fca10c81d99ff9956179058460dfddc0418f3902.zip
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/wusbcore/wusbhc.c26
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c
index 3638cc68529f..ee6256f23636 100644
--- a/drivers/usb/wusbcore/wusbhc.c
+++ b/drivers/usb/wusbcore/wusbhc.c
@@ -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
- *
- * 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).
+ * Store a new CHID.
*
- * 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.
*/
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