On Thu, 6 Dec 2012, Lamarque V. Souza wrote: > This patch against kernel 3.7.0-rc8 fixes a kernel oops when turning on the > bluetooth mouse with id 0458:0058 [1]. > > The mouse in question supports both input and hid sessions, however it is > blacklisted in drivers/hid/hid-core.c so the input session is one that should > be used. Long ago (around kernel 3.0.0) some changes in the bluetooth > subsystem made the kernel do not fallback to input session when hid session is > not supported or blacklisted. This patch restore that behaviour by making the > kernel try the input session if hid_add_device returns ENODEV. > > OBS: The patch exports hid_ignore() from hid-core.c so that it can be used in > the bluetooth subsystem. > > [1] https://bugzilla.kernel.org/show_bug.cgi?id=39882 > > Signed-off-by: Lamarque V. Souza <lamarque@xxxxxxxxx> I am fine with the hid core change. Adding Gustavo and linux-bluetooth@ for the net/bluetooth/hidp/ change ... Gustavo, could you please give me Ack on the Bluetooth part so that I could merge it? Thanks. > --- > > diff -Nrup a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c > --- a/drivers/hid/hid-core.c 2012-12-05 01:43:45.000000000 -0200 > +++ b/drivers/hid/hid-core.c 2012-12-05 01:26:57.000000000 -0200 > @@ -2150,8 +2150,13 @@ static const struct hid_device_id hid_mo > { } > }; > > -static bool hid_ignore(struct hid_device *hdev) > +bool hid_ignore(struct hid_device *hdev) > { > + if (hdev->quirks & HID_QUIRK_NO_IGNORE) > + return false; > + if (hdev->quirks & HID_QUIRK_IGNORE) > + return true; > + > switch (hdev->vendor) { > case USB_VENDOR_ID_CODEMERCS: > /* ignore all Code Mercenaries IOWarrior devices */ > @@ -2197,6 +2202,7 @@ static bool hid_ignore(struct hid_device > > return !!hid_match_id(hdev, hid_ignore_list); > } > +EXPORT_SYMBOL_GPL(hid_ignore); > > int hid_add_device(struct hid_device *hdev) > { > @@ -2208,8 +2214,7 @@ int hid_add_device(struct hid_device *hd > > /* we need to kill them here, otherwise they will stay allocated to > * wait for coming driver */ > - if (!(hdev->quirks & HID_QUIRK_NO_IGNORE) > - && (hid_ignore(hdev) || (hdev->quirks & HID_QUIRK_IGNORE))) > + if (hid_ignore(hdev)) > return -ENODEV; > > /* > diff -Nrup a/include/linux/hid.h b/include/linux/hid.h > --- a/include/linux/hid.h 2012-12-05 01:44:14.000000000 -0200 > +++ b/include/linux/hid.h 2012-12-05 01:26:57.000000000 -0200 > @@ -684,6 +684,7 @@ struct hid_ll_driver { > > extern int hid_debug; > > +extern bool hid_ignore(struct hid_device *); > extern int hid_add_device(struct hid_device *); > extern void hid_destroy_device(struct hid_device *); > > diff -Nrup a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c > --- a/net/bluetooth/hidp/core.c 2012-12-05 01:43:15.000000000 -0200 > +++ b/net/bluetooth/hidp/core.c 2012-12-05 02:29:49.000000000 -0200 > @@ -941,6 +941,13 @@ static int hidp_setup_hid(struct hidp_se > hid->hid_get_raw_report = hidp_get_raw_report; > hid->hid_output_raw_report = hidp_output_raw_report; > > + /* True if device is blacklisted in drivers/hid/hid-core.c */ > + if (hid_ignore(hid)) { > + hid_destroy_device(session->hid); > + session->hid = NULL; > + return -ENODEV; > + } > + > return 0; > > fault: > @@ -1013,7 +1020,7 @@ int hidp_add_connection(struct hidp_conn > > if (req->rd_size > 0) { > err = hidp_setup_hid(session, req); > - if (err) > + if (err && err != -ENODEV) > goto purge; > } > > -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
