Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934284AbaBDVJr (ORCPT ); Tue, 4 Feb 2014 16:09:47 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:56926 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934181AbaBDVJW (ORCPT ); Tue, 4 Feb 2014 16:09:22 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thomas Pugliese Subject: [PATCH 3.12 125/133] usb: core: get config and string descriptors for unauthorized devices Date: Tue, 4 Feb 2014 13:08:46 -0800 Message-Id: <20140204210740.560323261@linuxfoundation.org> X-Mailer: git-send-email 1.8.5.1.163.gd7aced9 In-Reply-To: <20140204210737.008598235@linuxfoundation.org> References: <20140204210737.008598235@linuxfoundation.org> User-Agent: quilt/0.61-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Pugliese commit 83e83ecb79a8225e79bc8e54e9aff3e0e27658a2 upstream. There is no need to skip querying the config and string descriptors for unauthorized WUSB devices when usb_new_device is called. It is allowed by WUSB spec. The only action that needs to be delayed until authorization time is the set config. This change allows user mode tools to see the config and string descriptors earlier in enumeration which is needed for some WUSB devices to function properly on Android systems. It also reduces the amount of divergent code paths needed for WUSB devices. Signed-off-by: Thomas Pugliese Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/config.c | 7 ------- drivers/usb/core/hub.c | 40 +++++++--------------------------------- 2 files changed, 7 insertions(+), 40 deletions(-) --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -651,10 +651,6 @@ void usb_destroy_configuration(struct us * * hub-only!! ... and only in reset path, or usb_new_device() * (used by real hubs and virtual root hubs) - * - * NOTE: if this is a WUSB device and is not authorized, we skip the - * whole thing. A non-authorized USB device has no - * configurations. */ int usb_get_configuration(struct usb_device *dev) { @@ -666,8 +662,6 @@ int usb_get_configuration(struct usb_dev struct usb_config_descriptor *desc; cfgno = 0; - if (dev->authorized == 0) /* Not really an error */ - goto out_not_authorized; result = -ENOMEM; if (ncfg > USB_MAXCONFIG) { dev_warn(ddev, "too many configurations: %d, " @@ -751,7 +745,6 @@ int usb_get_configuration(struct usb_dev err: kfree(desc); -out_not_authorized: dev->descriptor.bNumConfigurations = cfgno; err2: if (result == -ENOMEM) --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2242,18 +2242,13 @@ static int usb_enumerate_device(struct u return err; } } - if (udev->wusb == 1 && udev->authorized == 0) { - udev->product = kstrdup("n/a (unauthorized)", GFP_KERNEL); - udev->manufacturer = kstrdup("n/a (unauthorized)", GFP_KERNEL); - udev->serial = kstrdup("n/a (unauthorized)", GFP_KERNEL); - } - else { - /* read the standard strings and cache them if present */ - udev->product = usb_cache_string(udev, udev->descriptor.iProduct); - udev->manufacturer = usb_cache_string(udev, - udev->descriptor.iManufacturer); - udev->serial = usb_cache_string(udev, udev->descriptor.iSerialNumber); - } + + /* read the standard strings and cache them if present */ + udev->product = usb_cache_string(udev, udev->descriptor.iProduct); + udev->manufacturer = usb_cache_string(udev, + udev->descriptor.iManufacturer); + udev->serial = usb_cache_string(udev, udev->descriptor.iSerialNumber); + err = usb_enumerate_device_otg(udev); if (err < 0) return err; @@ -2435,16 +2430,6 @@ int usb_deauthorize_device(struct usb_de usb_dev->authorized = 0; usb_set_configuration(usb_dev, -1); - kfree(usb_dev->product); - usb_dev->product = kstrdup("n/a (unauthorized)", GFP_KERNEL); - kfree(usb_dev->manufacturer); - usb_dev->manufacturer = kstrdup("n/a (unauthorized)", GFP_KERNEL); - kfree(usb_dev->serial); - usb_dev->serial = kstrdup("n/a (unauthorized)", GFP_KERNEL); - - usb_destroy_configuration(usb_dev); - usb_dev->descriptor.bNumConfigurations = 0; - out_unauthorized: usb_unlock_device(usb_dev); return 0; @@ -2472,17 +2457,7 @@ int usb_authorize_device(struct usb_devi goto error_device_descriptor; } - kfree(usb_dev->product); - usb_dev->product = NULL; - kfree(usb_dev->manufacturer); - usb_dev->manufacturer = NULL; - kfree(usb_dev->serial); - usb_dev->serial = NULL; - usb_dev->authorized = 1; - result = usb_enumerate_device(usb_dev); - if (result < 0) - goto error_enumerate; /* Choose and set the configuration. This registers the interfaces * with the driver core and lets interface drivers bind to them. */ @@ -2498,7 +2473,6 @@ int usb_authorize_device(struct usb_devi } dev_info(&usb_dev->dev, "authorized to connect\n"); -error_enumerate: error_device_descriptor: usb_autosuspend_device(usb_dev); error_autoresume: -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/