diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2007-08-02 13:29:10 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-08-22 14:27:43 -0700 |
| commit | 74da5d68a54d66667664fbe233ededab2376a070 (patch) | |
| tree | a73f155820678252652457d69fe45aff0875e69c /drivers/usb/class | |
| parent | 8c273033906f8e85d54cb6ae052050f109440171 (diff) | |
| download | linux-74da5d68a54d66667664fbe233ededab2376a070.tar.bz2 | |
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>
Acked-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class')
| -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 fe940e0536e0..f51e22490edf 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -921,6 +921,10 @@ 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"); @@ -1109,10 +1113,12 @@ 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); |