lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 15 Jul 2013 11:57:24 +0800
From:	Rong Wang <wr011235813@...il.com>
To:	balbi@...com, Greg KH <gregkh@...uxfoundation.org>
Cc:	arnd@...db.de, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, Rong.Wang@....com
Subject: [PATCH] usb: udc: add gadget state kobject uevent

    usb: udc: add gadget state kobject uevent

    Add USB_UDC_STATE environment variable in udc uevent
    callback and trigger kobject_uevent in usb_gadget_set_state
    to inform the user-space the state of the gadget.

    Signed-off-by: Rong Wang <Rong.Wang@....com>

diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index ffd8fa5..05715d1 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -101,11 +101,32 @@ EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);

 /* ------------------------------------------------------------------------- */

+/**
+ * usb_gadget_set_state - set usb gadget state
+ * @gadget: gadget device
+ * @state: state defined in USB specification ch9
+ * Context: !in_interrupt()
+ */
 void usb_gadget_set_state(struct usb_gadget *gadget,
                enum usb_device_state state)
 {
+       struct usb_udc          *udc = NULL;
+
        gadget->state = state;
        sysfs_notify(&gadget->dev.kobj, NULL, "status");
+
+       mutex_lock(&udc_lock);
+       list_for_each_entry(udc, &udc_list, list)
+               if (udc->gadget == gadget)
+                       goto found;
+
+       dev_err(gadget->dev.parent, "gadget not registered.\n");
+       mutex_unlock(&udc_lock);
+       return;
+
+found:
+       mutex_unlock(&udc_lock);
+       kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
 }
 EXPORT_SYMBOL_GPL(usb_gadget_set_state);

@@ -538,6 +559,15 @@ static int usb_udc_uevent(struct device *dev,
struct kobj_uevent_env *env)
                }
        }

+       if (udc->gadget) {
+               ret = add_uevent_var(env, "USB_UDC_STATE=%s",
+                               usb_state_string(udc->gadget->state));
+               if (ret) {
+                       dev_err(dev, "failed to add uevent USB_UDC_STATE\n");
+                       return ret;
+               }
+       }
+
        return 0;
 }
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists