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Date: Wed, 29 Sep 2021 19:38:47 -0700
From: "Kuppuswamy, Sathyanarayanan"
<sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Dan Williams <dan.j.williams@...el.com>,
Alan Stern <stern@...land.harvard.edu>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Borislav Petkov <bp@...en8.de>, X86 ML <x86@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Andreas Noever <andreas.noever@...il.com>,
"Michael S . Tsirkin" <mst@...hat.com>,
Michael Jamet <michael.jamet@...el.com>,
Yehezkel Bernat <YehezkelShB@...il.com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Jonathan Corbet <corbet@....net>,
Jason Wang <jasowang@...hat.com>,
Andi Kleen <ak@...ux.intel.com>,
Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux PCI <linux-pci@...r.kernel.org>,
USB list <linux-usb@...r.kernel.org>,
virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 1/6] driver core: Move the "authorized" attribute from
USB/Thunderbolt to core
On 9/29/21 6:55 PM, Dan Williams wrote:
>> Also, you ignored the usb_[de]authorize_interface() functions and
>> their friends.
> Ugh, yes.
I did not change it because I am not sure about the interface vs device
dependency.
I think following change should work.
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index f57b5a7a90ca..84969732d09c 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -334,7 +334,7 @@ static int usb_probe_interface(struct device *dev)
if (udev->dev.authorized == false) {
dev_err(&intf->dev, "Device is not authorized for usage\n");
return error;
- } else if (intf->authorized == 0) {
+ } else if (intf->dev.authorized == 0) {
dev_err(&intf->dev, "Interface %d is not authorized for usage\n",
intf->altsetting->desc.bInterfaceNumber);
return error;
@@ -546,7 +546,7 @@ int usb_driver_claim_interface(struct usb_driver *driver,
return -EBUSY;
/* reject claim if interface is not authorized */
- if (!iface->authorized)
+ if (!iface->dev.authorized)
return -ENODEV;
dev->driver = &driver->drvwrap.driver;
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 47548ce1cfb1..ab3c8d1e4db9 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1791,9 +1791,9 @@ void usb_deauthorize_interface(struct usb_interface *intf)
device_lock(dev->parent);
- if (intf->authorized) {
+ if (intf->dev.authorized) {
device_lock(dev);
- intf->authorized = 0;
+ intf->dev.authorized = 0;
device_unlock(dev);
usb_forced_unbind_intf(intf);
@@ -1811,9 +1811,9 @@ void usb_authorize_interface(struct usb_interface *intf)
{
struct device *dev = &intf->dev;
- if (!intf->authorized) {
+ if (!intf->dev.authorized) {
device_lock(dev);
- intf->authorized = 1; /* authorize interface */
+ intf->dev.authorized = 1; /* authorize interface */
device_unlock(dev);
}
}
@@ -2069,7 +2069,6 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
intfc = cp->intf_cache[i];
intf->altsetting = intfc->altsetting;
intf->num_altsetting = intfc->num_altsetting;
- intf->authorized = !!HCD_INTF_AUTHORIZED(hcd);
kref_get(&intfc->ref);
alt = usb_altnum_to_altsetting(intf, 0);
@@ -2101,6 +2100,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
intf->minor = -1;
device_initialize(&intf->dev);
+ intf->dev.authorized = !!HCD_INTF_AUTHORIZED(hcd);
pm_runtime_no_callbacks(&intf->dev);
dev_set_name(&intf->dev, "%d-%s:%d.%d", dev->bus->busnum,
dev->devpath, configuration, ifnum);
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 3d63e345d0a0..666eeb80ff29 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -1160,9 +1160,7 @@ static DEVICE_ATTR_RO(supports_autosuspend);
static ssize_t interface_authorized_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct usb_interface *intf = to_usb_interface(dev);
-
- return sprintf(buf, "%u\n", intf->authorized);
+ return sprintf(buf, "%u\n", dev->authorized);
}
/*
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 796df4068e94..1e41453c63cb 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -195,8 +195,6 @@ usb_find_last_int_out_endpoint(struct usb_host_interface *alt,
* has been deferred.
* @needs_binding: flag set when the driver should be re-probed or unbound
* following a reset or suspend operation it doesn't support.
- * @authorized: This allows to (de)authorize individual interfaces instead
- * a whole device in contrast to the device authorization.
* @dev: driver model's view of this device
* @usb_dev: if an interface is bound to the USB major, this will point
* to the sysfs representation for that device.
@@ -252,7 +250,6 @@ struct usb_interface {
unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */
unsigned needs_binding:1; /* needs delayed unbind/rebind */
unsigned resetting_device:1; /* true: bandwidth alloc after reset */
- unsigned authorized:1; /* used for interface authorization */
struct device dev; /* interface specific device info */
struct device *usb_dev;
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
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