From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from buildserver.ru.mvista.com (unknown [85.21.88.6]) by ozlabs.org (Postfix) with ESMTP id 05DB5DDDEE for ; Thu, 13 Nov 2008 22:57:22 +1100 (EST) Date: Thu, 13 Nov 2008 14:57:20 +0300 From: Anton Vorontsov To: David Brownell Subject: [PATCH v2] usb/fsl_qe_udc: Report disconnect before unbinding Message-ID: <20081113115720.GA28276@oksana.dev.rtsoft.ru> References: <20081112185627.GA17699@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 In-Reply-To: <20081112185627.GA17699@oksana.dev.rtsoft.ru> Cc: Greg Kroah-Hartman , Li Yang , Alan Stern , linux-usb@vger.kernel.org, linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Gadgets disable endpoints in their disconnect callbacks, so we must call disconnect before unbinding. This also fixes muram memory leak, since we free muram in the qe_ep_disable(). But mainly the patch fixes following badness: root@b1:~# insmod fsl_qe_udc.ko fsl_qe_udc: Freescale QE/CPM USB Device Controller driver, 1.0 fsl_qe_udc e01006c0.usb: QE USB controller initialized as device root@b1:~# insmod g_ether.ko g_ether gadget: using random self ethernet address g_ether gadget: using random host ethernet address usb0: MAC be:2d:3c:fa:be:f0 usb0: HOST MAC 62:b8:6a:df:38:66 g_ether gadget: Ethernet Gadget, version: Memorial Day 2008 g_ether gadget: g_ether ready fsl_qe_udc e01006c0.usb: fsl_qe_udc bind to driver g_ether g_ether gadget: high speed config #1: CDC Ethernet (ECM) root@b1:~# rmmod g_ether.ko ------------[ cut here ]------------ Badness at drivers/usb/gadget/composite.c:871 [...] NIP [d10c1374] composite_unbind+0x24/0x15c [g_ether] LR [d10a82f4] usb_gadget_unregister_driver+0x128/0x168 [fsl_qe_udc] Call Trace: [cfb93e80] [cfb1f3a0] 0xcfb1f3a0 (unreliable) [cfb93eb0] [d10a82f4] usb_gadget_unregister_driver+0x128/0x168 [fsl_qe_udc] [cfb93ed0] [d10c2a3c] usb_composite_unregister+0x3c/0x4c [g_ether] [cfb93ee0] [c006bde0] sys_delete_module+0x130/0x19c [cfb93f40] [c00142d8] ret_from_syscall+0x0/0x38 [...] fsl_qe_udc e01006c0.usb: unregistered gadget driver 'g_ether' Signed-off-by: Anton Vorontsov --- v2: - Comment update per Alan Stern review. replaces usb.current/usb-fsl_qe_udc-report-disconnect-before-unbinding-fixing-oopses.patch drivers/usb/gadget/fsl_qe_udc.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c index 37c8575..3d6c956 100644 --- a/drivers/usb/gadget/fsl_qe_udc.c +++ b/drivers/usb/gadget/fsl_qe_udc.c @@ -2382,6 +2382,9 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) nuke(loop_ep, -ESHUTDOWN); spin_unlock_irqrestore(&udc_controller->lock, flags); + /* report disconnect; the controller is already quiesced */ + driver->disconnect(&udc_controller->gadget); + /* unbind gadget and unhook driver. */ driver->unbind(&udc_controller->gadget); udc_controller->gadget.dev.driver = NULL; -- 1.5.6.3