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authorAlan Stern <stern@rowland.harvard.edu>2007-08-02 13:29:10 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-08-22 17:27:43 -0400
commit74da5d68a54d66667664fbe233ededab2376a070 (patch)
treea73f155820678252652457d69fe45aff0875e69c /drivers/usb/class/cdc-acm.c
parent8c273033906f8e85d54cb6ae052050f109440171 (diff)
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/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c12
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:
921 return -EINVAL; 921 return -EINVAL;
922 } 922 }
923 } 923 }
924
925 /* Accept probe requests only for the control interface */
926 if (intf != control_interface)
927 return -ENODEV;
924 928
925 if (usb_interface_claimed(data_interface)) { /* valid in this context */ 929 if (usb_interface_claimed(data_interface)) { /* valid in this context */
926 dev_dbg(&intf->dev,"The data interface isn't available"); 930 dev_dbg(&intf->dev,"The data interface isn't available");
@@ -1109,10 +1113,12 @@ static void acm_disconnect(struct usb_interface *intf)
1109 return; 1113 return;
1110 } 1114 }
1111 if (acm->country_codes){ 1115 if (acm->country_codes){
1112 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1116 device_remove_file(&acm->control->dev,
1113 device_remove_file(&intf->dev, &dev_attr_iCountryCodeRelDate); 1117 &dev_attr_wCountryCodes);
1118 device_remove_file(&acm->control->dev,
1119 &dev_attr_iCountryCodeRelDate);
1114 } 1120 }
1115 device_remove_file(&intf->dev, &dev_attr_bmCapabilities); 1121 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
1116 acm->dev = NULL; 1122 acm->dev = NULL;
1117 usb_set_intfdata(acm->control, NULL); 1123 usb_set_intfdata(acm->control, NULL);
1118 usb_set_intfdata(acm->data, NULL); 1124 usb_set_intfdata(acm->data, NULL);