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authorAnton Vorontsov <avorontsov@ru.mvista.com>2008-11-13 15:00:46 +0300
committerGreg Kroah-Hartman <gregkh@kvm.kroah.org>2008-11-30 22:24:03 -0800
commit1f15a506f356aa21c29b6a7b0e9e826695273dfc (patch)
tree39a89a90d7e9e2304519a3884032f99a6b090476 /drivers
parent9ac36da3f8bc646a628bd09326e090defc8b7940 (diff)
downloadlinux-1f15a506f356aa21c29b6a7b0e9e826695273dfc.tar.bz2
USB: fsl_usb2_udc: Report disconnect before unbinding
Gadgets disable endpoints in their disconnect callbacks, so we must call disconnect before unbinding. The patch fixes following badness: root@b1:~# insmod fsl_usb2_udc.ko Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007) root@b1:~# insmod g_ether.ko g_ether gadget: using random self ethernet address g_ether gadget: using random host ethernet address usb0: MAC 26:07:ba:c0:44:33 usb0: HOST MAC 96:81:0c:05:4d:e3 g_ether gadget: Ethernet Gadget, version: Memorial Day 2008 g_ether gadget: g_ether ready fsl-usb2-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 [e10c3454] composite_unbind+0x24/0x15c [g_ether] LR [e10aa454] usb_gadget_unregister_driver+0x13c/0x164 [fsl_usb2_udc] Call Trace: [df145e80] [ffffff94] 0xffffff94 (unreliable) [df145eb0] [e10aa454] usb_gadget_unregister_driver+0x13c/0x164 [fsl_usb2_udc] [df145ed0] [e10c4c40] usb_composite_unregister+0x3c/0x4c [g_ether] [df145ee0] [c006bcc0] sys_delete_module+0x130/0x19c [df145f40] [c00142d8] ret_from_syscall+0x0/0x38 [...] unregistered gadget driver 'g_ether' Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/gadget/fsl_usb2_udc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/gadget/fsl_usb2_udc.c b/drivers/usb/gadget/fsl_usb2_udc.c
index 091bb55c9aa7..f3c6703cffda 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.c
+++ b/drivers/usb/gadget/fsl_usb2_udc.c
@@ -1836,6 +1836,9 @@ 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;