diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2007-08-02 21:29:10 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-08-10 01:27:24 +0400 |
| commit | 6b30a4e1c357410a78d7bcb831743b0e99bab4ad (patch) | |
| tree | 909d5cef55432253c6a37fada833e999e9f6d3dd /drivers | |
| parent | f44bba1a92e01bbab6ca9817b86ddf9e1744a616 (diff) | |
| download | linux-6b30a4e1c357410a78d7bcb831743b0e99bab4ad.tar.xz | |
USB: cdc-acm: fix sysfs attribute registration bug
This patch (as950) fixes a bug in the cdc-acm driver. It doesn't keep
track of which interface (control or data) the sysfs attributes get
registered for, and as a result, during disconnect it will sometimes
attempt to remove the attributes from the wrong interface. The
left-over attributes can cause a crash later on, particularly if the driver
module has been unloaded.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 0081c1d12687..407fb8feaba7 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -919,6 +919,10 @@ skip_normal_probe: return -EINVAL; } } + + /* Accept probe requests only for the control interface */ + if (intf != control_interface) + return -ENODEV; if (usb_interface_claimed(data_interface)) { /* valid in this context */ dev_dbg(&intf->dev,"The data interface isn't available"); @@ -1107,10 +1111,12 @@ static void acm_disconnect(struct usb_interface *intf) return; } if (acm->country_codes){ - device_remove_file(&intf->dev, &dev_attr_wCountryCodes); - device_remove_file(&intf->dev, &dev_attr_iCountryCodeRelDate); + device_remove_file(&acm->control->dev, + &dev_attr_wCountryCodes); + device_remove_file(&acm->control->dev, + &dev_attr_iCountryCodeRelDate); } - device_remove_file(&intf->dev, &dev_attr_bmCapabilities); + device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); acm->dev = NULL; usb_set_intfdata(acm->control, NULL); usb_set_intfdata(acm->data, NULL); |