diff options
| author | Simon Arlott <simon@arlott.org> | 2007-03-06 02:47:43 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 13:28:34 -0700 |
| commit | e9b8daf31b459acb440647a651b1bda3b30e6188 (patch) | |
| tree | 6ac500a77eb7bd2b2915566d982b5b40c24ff47b /drivers/usb | |
| parent | c2cf3f6ec58cf1d9e2a92cd74506dcf2265b31a1 (diff) | |
| download | linux-e9b8daf31b459acb440647a651b1bda3b30e6188.tar.bz2 | |
usbatm: create sysfs link "device" from atm class device to usb interface
There is currently no path from the ATM device in /sys to the USB device's
interface that the driver is using; this patch creates a "device" symlink. It
is then possible to get to the cxacru ADSL statistics
(http://lkml.org/lkml/2007/2/23/328):
/sys/class/atm/cxacru0/device $ ls *_rate *_margin *_attenuation
downstream_attenuation downstream_snr_margin upstream_rate
downstream_rate upstream_attenuation upstream_snr_margin
If this link is not appropriate I'd have to create device files in
/sys/class/atm/cxacru0 instead - which seems less appropriate since the ADSL
statistics are for the USB device not ATM (which is running over the ADSL).
[akpm@linux-foundation.org: cleanups]
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Cc: Duncan Sands <duncan.sands@math.u-psud.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/atm/usbatm.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c index d3e2c5f90a26..746d30ffb732 100644 --- a/drivers/usb/atm/usbatm.c +++ b/drivers/usb/atm/usbatm.c @@ -968,6 +968,14 @@ static int usbatm_atm_init(struct usbatm_data *instance) /* temp init ATM device, set to 128kbit */ atm_dev->link_rate = 128 * 1000 / 424; + ret = sysfs_create_link(&atm_dev->class_dev.kobj, + &instance->usb_intf->dev.kobj, "device"); + if (ret) { + atm_err(instance, "%s: sysfs_create_link failed: %d\n", + __func__, ret); + goto fail_sysfs; + } + if (instance->driver->atm_start && ((ret = instance->driver->atm_start(instance, atm_dev)) < 0)) { atm_err(instance, "%s: atm_start failed: %d!\n", __func__, ret); goto fail; @@ -986,6 +994,8 @@ static int usbatm_atm_init(struct usbatm_data *instance) return 0; fail: + sysfs_remove_link(&atm_dev->class_dev.kobj, "device"); + fail_sysfs: instance->atm_dev = NULL; atm_dev_deregister(atm_dev); /* usbatm_atm_dev_close will eventually be called */ return ret; @@ -1318,8 +1328,10 @@ void usbatm_usb_disconnect(struct usb_interface *intf) kfree(instance->cell_buf); /* ATM finalize */ - if (instance->atm_dev) + if (instance->atm_dev) { + sysfs_remove_link(&instance->atm_dev->class_dev.kobj, "device"); atm_dev_deregister(instance->atm_dev); + } usbatm_put_instance(instance); /* taken in usbatm_usb_probe */ } |