Ceres: usb: usb gadget driver

fix a kernel panic when removing usb cable

Bug 1437976
Bug 200040945

Change-Id: Ie9f947c1a829f5b5bc44127d4856d408f97f8057
Signed-off-by: Phil Luo <phluo@nvidia.com>
Reviewed-on: http://git-master/r/382446
Signed-off-by: Gaurav Singh <gauravsingh@nvidia.com>
Reviewed-on: http://git-master/r/556799
Reviewed-by: Rick Song <ricks@nvidia.com>
Reviewed-by: Robert Shih <rshih@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 024bba4345ed8bc7e7560d0579ca350dfd5aaeae..74190e8051a6e1ade183b3c934b24d169b150b22 100644 (file)
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -865,7 +865,8 @@ void usb_remove_config(struct usb_composite_dev *cdev,
        if (cdev->config == config)
                reset_config(cdev);
 
-       list_del(&config->list);
+       if((&config->list)->next != LIST_POISON1)
+               list_del(&config->list);
 
        spin_unlock_irqrestore(&cdev->lock, flags);