提交 fde4e2f7 编写于 作者: A Alan Stern 提交者: Jiri Kosina

HID: fix suspend crash by moving initializations earlier

Although the usbhid driver allocates its usbhid structure in the probe
routine, several critical fields in that structure don't get
initialized until usbhid_start().  However if report descriptor
parsing fails then usbhid_start() is never called.  This leads to
problems during system suspend -- the system will freeze.

This patch (as1378) fixes the bug by moving the initialization
statements up into usbhid_probe().
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Reported-by: NBruno Prémont <bonbons@linux-vserver.org>
Tested-By: NBruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
上级 fddb33f2
...@@ -999,13 +999,6 @@ static int usbhid_start(struct hid_device *hid) ...@@ -999,13 +999,6 @@ static int usbhid_start(struct hid_device *hid)
} }
} }
init_waitqueue_head(&usbhid->wait);
INIT_WORK(&usbhid->reset_work, hid_reset);
INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
spin_lock_init(&usbhid->lock);
usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
if (!usbhid->urbctrl) { if (!usbhid->urbctrl) {
ret = -ENOMEM; ret = -ENOMEM;
...@@ -1179,6 +1172,12 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id * ...@@ -1179,6 +1172,12 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
usbhid->intf = intf; usbhid->intf = intf;
usbhid->ifnum = interface->desc.bInterfaceNumber; usbhid->ifnum = interface->desc.bInterfaceNumber;
init_waitqueue_head(&usbhid->wait);
INIT_WORK(&usbhid->reset_work, hid_reset);
INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
spin_lock_init(&usbhid->lock);
ret = hid_add_device(hid); ret = hid_add_device(hid);
if (ret) { if (ret) {
if (ret != -ENODEV) if (ret != -ENODEV)
......
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