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Date: Thu, 17 Sep 2009 07:56:52 -0700
From: Marcel Holtmann <marcel@...tmann.org>
To: Jiri Kosina <jkosina@...e.cz>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
linux-kernel@...r.kernel.org
Subject: Re: [GIT] HID patches for 2.6.32 merge window
Hi Jiri,
> > > diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
> > > index 09bedeb..75df1e1 100644
> > > --- a/net/bluetooth/hidp/core.c
> > > +++ b/net/bluetooth/hidp/core.c
> > > @@ -576,15 +576,8 @@ static int hidp_session(void *arg)
> > > session->input = NULL;
> > > }
> > >
> > > - if (session->hid) {
> > > - if (session->hid->claimed & HID_CLAIMED_INPUT)
> > > - hidinput_disconnect(session->hid);
> > > - if (session->hid->claimed & HID_CLAIMED_HIDRAW)
> > > - hidraw_disconnect(session->hid);
> > > -
> > > + if (session->hid)
> > > hid_destroy_device(session->hid);
> > > - session->hid = NULL;
> > > - }
> >
> > can you please leave the session->hid = NULL part inside the code. It is
> > important that it stays. Other than that
> >
> > Acked-by: Marcel Holtmann <marcel@...tmann.org>
>
> Thanks. I now have the patch below in the queue
>
>
>
> From: Jiri Kosina <jkosina@...e.cz>
> Subject: [PATCH] HID: consolidate connect and disconnect into core code
>
> HID core registers input, hidraw and hiddev devices, but leaves
> unregistering it up to the individual driver, which is not really nice.
> Let's move all the logic to the core.
>
> Reported-by: Marcel Holtmann <marcel@...tmann.org>
> Reported-by: Brian Rogers <brian@...w.org>
> Acked-by: Marcel Holtmann <marcel@...tmann.org>
> Signed-off-by: Jiri Kosina <jkosina@...e.cz>
> ---
> drivers/hid/hid-core.c | 11 +++++++++++
> drivers/hid/usbhid/hid-core.c | 16 +++++-----------
> include/linux/hid.h | 3 +++
> net/bluetooth/hidp/core.c | 7 -------
> 4 files changed, 19 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index ca9bb26..be34d32 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -1237,6 +1237,17 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
> }
> EXPORT_SYMBOL_GPL(hid_connect);
>
> +void hid_disconnect(struct hid_device *hdev)
> +{
> + if (hdev->claimed & HID_CLAIMED_INPUT)
> + hidinput_disconnect(hdev);
> + if (hdev->claimed & HID_CLAIMED_HIDDEV)
> + hdev->hiddev_disconnect(hdev);
> + if (hdev->claimed & HID_CLAIMED_HIDRAW)
> + hidraw_disconnect(hdev);
> +}
> +EXPORT_SYMBOL_GPL(hid_disconnect);
> +
> /* a list of devices for which there is a specialized driver on HID bus */
> static const struct hid_device_id hid_blacklist[] = {
> { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
> diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
> index 1b0e07a..03bd703 100644
> --- a/drivers/hid/usbhid/hid-core.c
> +++ b/drivers/hid/usbhid/hid-core.c
> @@ -1041,13 +1041,6 @@ static void usbhid_stop(struct hid_device *hid)
>
> hid_cancel_delayed_stuff(usbhid);
>
> - if (hid->claimed & HID_CLAIMED_INPUT)
> - hidinput_disconnect(hid);
> - if (hid->claimed & HID_CLAIMED_HIDDEV)
> - hiddev_disconnect(hid);
> - if (hid->claimed & HID_CLAIMED_HIDRAW)
> - hidraw_disconnect(hid);
> -
> hid->claimed = 0;
>
> usb_free_urb(usbhid->urbin);
> @@ -1085,7 +1078,7 @@ static struct hid_ll_driver usb_hid_driver = {
> .hidinput_input_event = usb_hidinput_input_event,
> };
>
> -static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
> +static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
> {
> struct usb_host_interface *interface = intf->cur_altsetting;
> struct usb_device *dev = interface_to_usbdev(intf);
> @@ -1117,6 +1110,7 @@ static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
> hid->ff_init = hid_pidff_init;
> #ifdef CONFIG_USB_HIDDEV
> hid->hiddev_connect = hiddev_connect;
> + hid->hiddev_disconnect = hiddev_disconnect;
> hid->hiddev_hid_event = hiddev_hid_event;
> hid->hiddev_report_event = hiddev_report_event;
> #endif
> @@ -1177,7 +1171,7 @@ err:
> return ret;
> }
>
> -static void hid_disconnect(struct usb_interface *intf)
> +static void usbhid_disconnect(struct usb_interface *intf)
> {
> struct hid_device *hid = usb_get_intfdata(intf);
> struct usbhid_device *usbhid;
> @@ -1359,8 +1353,8 @@ MODULE_DEVICE_TABLE (usb, hid_usb_ids);
>
> static struct usb_driver hid_driver = {
> .name = "usbhid",
> - .probe = hid_probe,
> - .disconnect = hid_disconnect,
> + .probe = usbhid_probe,
> + .disconnect = usbhid_disconnect,
> #ifdef CONFIG_PM
> .suspend = hid_suspend,
> .resume = hid_resume,
> diff --git a/include/linux/hid.h b/include/linux/hid.h
> index a0ebdac..10f6284 100644
> --- a/include/linux/hid.h
> +++ b/include/linux/hid.h
> @@ -494,6 +494,7 @@ struct hid_device { /* device report descriptor */
>
> /* hiddev event handler */
> int (*hiddev_connect)(struct hid_device *, unsigned int);
> + void (*hiddev_disconnect)(struct hid_device *);
> void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
> struct hid_usage *, __s32);
> void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
> @@ -691,6 +692,7 @@ struct hid_device *hid_allocate_device(void);
> int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
> int hid_check_keys_pressed(struct hid_device *hid);
> int hid_connect(struct hid_device *hid, unsigned int connect_mask);
> +void hid_disconnect(struct hid_device *hid);
>
> /**
> * hid_map_usage - map usage input bits
> @@ -800,6 +802,7 @@ static inline int __must_check hid_hw_start(struct hid_device *hdev,
> */
> static inline void hid_hw_stop(struct hid_device *hdev)
> {
> + hid_disconnect(hdev);
> hdev->ll_driver->stop(hdev);
> }
>
> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
> index 09bedeb..49d8495 100644
> --- a/net/bluetooth/hidp/core.c
> +++ b/net/bluetooth/hidp/core.c
> @@ -577,11 +577,6 @@ static int hidp_session(void *arg)
> }
>
> if (session->hid) {
> - if (session->hid->claimed & HID_CLAIMED_INPUT)
> - hidinput_disconnect(session->hid);
> - if (session->hid->claimed & HID_CLAIMED_HIDRAW)
> - hidraw_disconnect(session->hid);
> -
> hid_destroy_device(session->hid);
> session->hid = NULL;
> }
> @@ -747,8 +742,6 @@ static void hidp_stop(struct hid_device *hid)
> skb_queue_purge(&session->ctrl_transmit);
> skb_queue_purge(&session->intr_transmit);
>
> - if (hid->claimed & HID_CLAIMED_INPUT)
> - hidinput_disconnect(hid);
> hid->claimed = 0;
> }
is the hid->claimed = 0 still necessary here? Not that it seems to
really matter, but it would be much cleaner if the HID transport driver
doesn't have to touch these details.
Regards
Marcel
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