From eb0be47dbbdca133b1b94adc564297f25176b3ab Mon Sep 17 00:00:00 2001 From: Patrik Sevallius Date: Tue, 20 Nov 2007 09:32:00 -0800 Subject: [PATCH] USB: usb peripheral controller driver oops avoidance I'm having problem with oopses when rebooting, if I modprobe g_serial and rmmod g_serial and do a reboot I get an oops in device_shutdown(). The reason seems to be that usb_gadget_unregister_driver() doesn't do enough cleanup. With this at91_udc patch I don't get the oops. Signed-off-by: Patrik Sevallius [ Same bug was in other peripheral controller drivers; fixed ] Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/amd5536udc.c | 1 + drivers/usb/gadget/at91_udc.c | 2 ++ drivers/usb/gadget/goku_udc.c | 1 + drivers/usb/gadget/lh7a40x_udc.c | 1 + drivers/usb/gadget/m66592-udc.c | 1 + drivers/usb/gadget/pxa2xx_udc.c | 1 + 6 files changed, 7 insertions(+) diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c index 66e10da8a490..b663f23f2642 100644 --- a/drivers/usb/gadget/amd5536udc.c +++ b/drivers/usb/gadget/amd5536udc.c @@ -2038,6 +2038,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) spin_unlock_irqrestore(&dev->lock, flags); driver->unbind(&dev->gadget); + dev->gadget.dev.driver = NULL; dev->driver = NULL; /* set SD */ diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c index cd62b029d176..4b6ed353ae36 100644 --- a/drivers/usb/gadget/at91_udc.c +++ b/drivers/usb/gadget/at91_udc.c @@ -1616,6 +1616,8 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) local_irq_enable(); driver->unbind(&udc->gadget); + udc->gadget.dev.driver = NULL; + udc->gadget.dev.driver_data = NULL; udc->driver = NULL; DBG("unbound from %s\n", driver->driver.name); diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c index 2ec9d196a8cf..d3e702576de6 100644 --- a/drivers/usb/gadget/goku_udc.c +++ b/drivers/usb/gadget/goku_udc.c @@ -1422,6 +1422,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) spin_unlock_irqrestore(&dev->lock, flags); driver->unbind(&dev->gadget); + dev->gadget.dev.driver = NULL; DBG(dev, "unregistered driver '%s'\n", driver->driver.name); return 0; diff --git a/drivers/usb/gadget/lh7a40x_udc.c b/drivers/usb/gadget/lh7a40x_udc.c index 367b75c0b25b..37243ef7104e 100644 --- a/drivers/usb/gadget/lh7a40x_udc.c +++ b/drivers/usb/gadget/lh7a40x_udc.c @@ -474,6 +474,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) spin_unlock_irqrestore(&dev->lock, flags); driver->unbind(&dev->gadget); + dev->gadget.dev.driver = NULL; device_del(&dev->gadget.dev); udc_disable(dev); diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c index 43f02189dc44..835948f0715a 100644 --- a/drivers/usb/gadget/m66592-udc.c +++ b/drivers/usb/gadget/m66592-udc.c @@ -1508,6 +1508,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0); driver->unbind(&m66592->gadget); + m66592->gadget.dev.driver = NULL; init_controller(m66592); disable_controller(m66592); diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c index 8c139d416ac4..4abf9d26d615 100644 --- a/drivers/usb/gadget/pxa2xx_udc.c +++ b/drivers/usb/gadget/pxa2xx_udc.c @@ -1345,6 +1345,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) local_irq_enable(); driver->unbind(&dev->gadget); + dev->gadget.dev.driver = NULL; dev->driver = NULL; device_del (&dev->gadget.dev);