* [4.1.0-07254-gc13c810] Regression: Bluetooth not working.
@ 2015-06-26 9:27 Jörg Otte
2015-06-26 9:37 ` Marcel Holtmann
0 siblings, 1 reply; 13+ messages in thread
From: Jörg Otte @ 2015-06-26 9:27 UTC (permalink / raw)
To: Alexey Dobriyan, Marcel Holtmann, Johan Hedberg,
bluez mailin list (linux-bluetooth@vger.kernel.org),
inux Kernel Mailing List
Cc: Linus Torvalds
Bluetooth is inoperable in current Linus tree and the
first bad commit is:
835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit
commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5
Author: Alexey Dobriyan <adobriyan@gmail.com>
Date: Wed Jun 10 20:28:33 2015 +0300
Bluetooth: Stop sabotaging list poisoning
list_del() poisons pointers with special values, no need to overwrite t=
hem.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
My BT adapter is an intel 8087:07da
I reverted that commit and this fixed the problem for me.
Thanks, J=C3=B6rg
^ permalink raw reply [flat|nested] 13+ messages in thread* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-26 9:27 [4.1.0-07254-gc13c810] Regression: Bluetooth not working Jörg Otte @ 2015-06-26 9:37 ` Marcel Holtmann 2015-06-26 10:03 ` Jörg Otte 0 siblings, 1 reply; 13+ messages in thread From: Marcel Holtmann @ 2015-06-26 9:37 UTC (permalink / raw) To: Jörg Otte Cc: Alexey Dobriyan, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds Hi Joerg, > Bluetooth is inoperable in current Linus tree and the > first bad commit is: > > 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit > commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 > Author: Alexey Dobriyan <adobriyan@gmail.com> > Date: Wed Jun 10 20:28:33 2015 +0300 > > Bluetooth: Stop sabotaging list poisoning > > list_del() poisons pointers with special values, no need to overwrite them. > > Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> > Signed-off-by: Marcel Holtmann <marcel@holtmann.org> > > My BT adapter is an intel 8087:07da > I reverted that commit and this fixed the problem for me. today we had a patch from Tedd fixing the list initialization in the HIDP code. diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index 9070dfd6b4ad..f1a117f8cad2 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, session->conn = l2cap_conn_get(conn); session->user.probe = hidp_session_probe; session->user.remove = hidp_session_remove; + INIT_LIST_HEAD(&session->user.list); session->ctrl_sock = ctrl_sock; session->intr_sock = intr_sock; skb_queue_head_init(&session->ctrl_transmit); Could this be fixing it for you as well? Regards Marcel ^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-26 9:37 ` Marcel Holtmann @ 2015-06-26 10:03 ` Jörg Otte 2015-06-26 10:27 ` Alexey Dobriyan 2015-06-26 14:28 ` Jörg Otte 0 siblings, 2 replies; 13+ messages in thread From: Jörg Otte @ 2015-06-26 10:03 UTC (permalink / raw) To: Marcel Holtmann Cc: Alexey Dobriyan, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: > Hi Joerg, > >> Bluetooth is inoperable in current Linus tree and the >> first bad commit is: >> >> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >> Author: Alexey Dobriyan <adobriyan@gmail.com> >> Date: Wed Jun 10 20:28:33 2015 +0300 >> >> Bluetooth: Stop sabotaging list poisoning >> >> list_del() poisons pointers with special values, no need to overwrite= them. >> >> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >> >> My BT adapter is an intel 8087:07da >> I reverted that commit and this fixed the problem for me. > > today we had a patch from Tedd fixing the list initialization in the HIDP= code. > > diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c > index 9070dfd6b4ad..f1a117f8cad2 100644 > --- a/net/bluetooth/hidp/core.c > +++ b/net/bluetooth/hidp/core.c > @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **out= , const bdaddr_t *bdaddr, > session->conn =3D l2cap_conn_get(conn); > session->user.probe =3D hidp_session_probe; > session->user.remove =3D hidp_session_remove; > + INIT_LIST_HEAD(&session->user.list); > session->ctrl_sock =3D ctrl_sock; > session->intr_sock =3D intr_sock; > skb_queue_head_init(&session->ctrl_transmit); > > Could this be fixing it for you as well? > I will check this when I am at home in the afternoon. Thanks, J=C3=B6rg ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-26 10:03 ` Jörg Otte @ 2015-06-26 10:27 ` Alexey Dobriyan 2015-06-26 14:28 ` Jörg Otte 1 sibling, 0 replies; 13+ messages in thread From: Alexey Dobriyan @ 2015-06-26 10:27 UTC (permalink / raw) To: Jörg Otte Cc: Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds On Fri, Jun 26, 2015 at 1:03 PM, J=C3=B6rg Otte <jrg.otte@gmail.com> wrote: > 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >> --- a/net/bluetooth/hidp/core.c >> +++ b/net/bluetooth/hidp/core.c >> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **ou= t, const bdaddr_t *bdaddr, >> session->conn =3D l2cap_conn_get(conn); >> session->user.probe =3D hidp_session_probe; >> session->user.remove =3D hidp_session_remove; >> + INIT_LIST_HEAD(&session->user.list); Heh, I checked every list.next/prev instance except init bit. Sorry for the breakage. Alexey ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-26 10:03 ` Jörg Otte 2015-06-26 10:27 ` Alexey Dobriyan @ 2015-06-26 14:28 ` Jörg Otte 2015-06-28 15:36 ` Jörg Otte 1 sibling, 1 reply; 13+ messages in thread From: Jörg Otte @ 2015-06-26 14:28 UTC (permalink / raw) To: Marcel Holtmann Cc: Alexey Dobriyan, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: > 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >> Hi Joerg, >> >>> Bluetooth is inoperable in current Linus tree and the >>> first bad commit is: >>> >>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >>> Author: Alexey Dobriyan <adobriyan@gmail.com> >>> Date: Wed Jun 10 20:28:33 2015 +0300 >>> >>> Bluetooth: Stop sabotaging list poisoning >>> >>> list_del() poisons pointers with special values, no need to overwrit= e them. >>> >>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >>> >>> My BT adapter is an intel 8087:07da >>> I reverted that commit and this fixed the problem for me. >> >> today we had a patch from Tedd fixing the list initialization in the HID= P code. >> >> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >> index 9070dfd6b4ad..f1a117f8cad2 100644 >> --- a/net/bluetooth/hidp/core.c >> +++ b/net/bluetooth/hidp/core.c >> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **ou= t, const bdaddr_t *bdaddr, >> session->conn =3D l2cap_conn_get(conn); >> session->user.probe =3D hidp_session_probe; >> session->user.remove =3D hidp_session_remove; >> + INIT_LIST_HEAD(&session->user.list); >> session->ctrl_sock =3D ctrl_sock; >> session->intr_sock =3D intr_sock; >> skb_queue_head_init(&session->ctrl_transmit); >> >> Could this be fixing it for you as well? >> > I will check this when I am at home in the > afternoon. > The patch works for me too. Thanks, J=C3=B6rg ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-26 14:28 ` Jörg Otte @ 2015-06-28 15:36 ` Jörg Otte 2015-06-28 16:09 ` Alexey Dobriyan 0 siblings, 1 reply; 13+ messages in thread From: Jörg Otte @ 2015-06-28 15:36 UTC (permalink / raw) To: Marcel Holtmann Cc: Alexey Dobriyan, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >>> Hi Joerg, >>> >>>> Bluetooth is inoperable in current Linus tree and the >>>> first bad commit is: >>>> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 >>>> >>>> Bluetooth: Stop sabotaging list poisoning >>>> >>>> list_del() poisons pointers with special values, no need to overwri= te them. >>>> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >>>> >>>> My BT adapter is an intel 8087:07da >>>> I reverted that commit and this fixed the problem for me. >>> >>> today we had a patch from Tedd fixing the list initialization in the HI= DP code. >>> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >>> index 9070dfd6b4ad..f1a117f8cad2 100644 >>> --- a/net/bluetooth/hidp/core.c >>> +++ b/net/bluetooth/hidp/core.c >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **o= ut, const bdaddr_t *bdaddr, >>> session->conn =3D l2cap_conn_get(conn); >>> session->user.probe =3D hidp_session_probe; >>> session->user.remove =3D hidp_session_remove; >>> + INIT_LIST_HEAD(&session->user.list); >>> session->ctrl_sock =3D ctrl_sock; >>> session->intr_sock =3D intr_sock; >>> skb_queue_head_init(&session->ctrl_transmit); >>> >>> Could this be fixing it for you as well? >>> >> I will check this when I am at home in the >> afternoon. >> > > The patch works for me too. > Ok, this was a little bit hasty! I now see the following additional problems: - System freeze on resume (occures always). - System freeze on shutdown (occures sometimes) - System freeze when BT-mouse is connecting (occures sometimes). Then I can't do anything except power off. This happens only if Bluetooth AND BT-mouse is activated. Thanks, J=C3=B6rg ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-28 15:36 ` Jörg Otte @ 2015-06-28 16:09 ` Alexey Dobriyan 2015-06-29 9:00 ` Jörg Otte 0 siblings, 1 reply; 13+ messages in thread From: Alexey Dobriyan @ 2015-06-28 16:09 UTC (permalink / raw) To: Jörg Otte Cc: Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds On Sun, Jun 28, 2015 at 05:36:04PM +0200, Jörg Otte wrote: > 2015-06-26 16:28 GMT+02:00 Jörg Otte <jrg.otte@gmail.com>: > > 2015-06-26 12:03 GMT+02:00 Jörg Otte <jrg.otte@gmail.com>: > >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: > >>> Hi Joerg, > >>> > >>>> Bluetooth is inoperable in current Linus tree and the > >>>> first bad commit is: > >>>> > >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit > >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 > >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> > >>>> Date: Wed Jun 10 20:28:33 2015 +0300 > >>>> > >>>> Bluetooth: Stop sabotaging list poisoning > >>>> > >>>> list_del() poisons pointers with special values, no need to overwrite them. > >>>> > >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> > >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> > >>>> > >>>> My BT adapter is an intel 8087:07da > >>>> I reverted that commit and this fixed the problem for me. > >>> > >>> today we had a patch from Tedd fixing the list initialization in the HIDP code. > >>> > >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c > >>> index 9070dfd6b4ad..f1a117f8cad2 100644 > >>> --- a/net/bluetooth/hidp/core.c > >>> +++ b/net/bluetooth/hidp/core.c > >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, > >>> session->conn = l2cap_conn_get(conn); > >>> session->user.probe = hidp_session_probe; > >>> session->user.remove = hidp_session_remove; > >>> + INIT_LIST_HEAD(&session->user.list); > >>> session->ctrl_sock = ctrl_sock; > >>> session->intr_sock = intr_sock; > >>> skb_queue_head_init(&session->ctrl_transmit); > >>> > >>> Could this be fixing it for you as well? > >>> > >> I will check this when I am at home in the > >> afternoon. > >> > > > > The patch works for me too. > > > Ok, this was a little bit hasty! > I now see the following additional problems: > > - System freeze on resume (occures always). > - System freeze on shutdown (occures sometimes) > - System freeze when BT-mouse is connecting (occures sometimes). > > Then I can't do anything except power off. > > This happens only if Bluetooth AND BT-mouse is activated. OK, what happens if you just revert only list_del patch? ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-28 16:09 ` Alexey Dobriyan @ 2015-06-29 9:00 ` Jörg Otte 2015-06-29 10:30 ` Alexey Dobriyan 0 siblings, 1 reply; 13+ messages in thread From: Jörg Otte @ 2015-06-29 9:00 UTC (permalink / raw) To: Alexey Dobriyan Cc: Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-28 18:09 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: > On Sun, Jun 28, 2015 at 05:36:04PM +0200, J=C3=B6rg Otte wrote: >> 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >> > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >> >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >> >>> Hi Joerg, >> >>> >> >>>> Bluetooth is inoperable in current Linus tree and the >> >>>> first bad commit is: >> >>>> >> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >> >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >> >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> >> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 >> >>>> >> >>>> Bluetooth: Stop sabotaging list poisoning >> >>>> >> >>>> list_del() poisons pointers with special values, no need to over= write them. >> >>>> >> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >> >>>> >> >>>> My BT adapter is an intel 8087:07da >> >>>> I reverted that commit and this fixed the problem for me. >> >>> >> >>> today we had a patch from Tedd fixing the list initialization in the= HIDP code. >> >>> >> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >> >>> index 9070dfd6b4ad..f1a117f8cad2 100644 >> >>> --- a/net/bluetooth/hidp/core.c >> >>> +++ b/net/bluetooth/hidp/core.c >> >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session = **out, const bdaddr_t *bdaddr, >> >>> session->conn =3D l2cap_conn_get(conn); >> >>> session->user.probe =3D hidp_session_probe; >> >>> session->user.remove =3D hidp_session_remove; >> >>> + INIT_LIST_HEAD(&session->user.list); >> >>> session->ctrl_sock =3D ctrl_sock; >> >>> session->intr_sock =3D intr_sock; >> >>> skb_queue_head_init(&session->ctrl_transmit); >> >>> >> >>> Could this be fixing it for you as well? >> >>> >> >> I will check this when I am at home in the >> >> afternoon. >> >> >> > >> > The patch works for me too. >> > >> Ok, this was a little bit hasty! >> I now see the following additional problems: >> >> - System freeze on resume (occures always). >> - System freeze on shutdown (occures sometimes) >> - System freeze when BT-mouse is connecting (occures sometimes). >> >> Then I can't do anything except power off. >> >> This happens only if Bluetooth AND BT-mouse is activated. > > OK, what happens if you just revert only list_del patch? I have applied this patch: diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index 9070dfd6b4ad..f1a117f8cad2 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, session->conn =3D l2cap_conn_get(conn); session->user.probe =3D hidp_session_probe; session->user.remove =3D hidp_session_remove; + INIT_LIST_HEAD(&session->user.list); session->ctrl_sock =3D ctrl_sock; session->intr_sock =3D intr_sock; skb_queue_head_init(&session->ctrl_transmit); without this patch bluetooth doesn't work at all for me. Thanks, J=C3=B6rg ^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-29 9:00 ` Jörg Otte @ 2015-06-29 10:30 ` Alexey Dobriyan 2015-06-29 14:37 ` Jörg Otte 0 siblings, 1 reply; 13+ messages in thread From: Alexey Dobriyan @ 2015-06-29 10:30 UTC (permalink / raw) To: Jörg Otte Cc: Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds On Mon, Jun 29, 2015 at 12:00 PM, J=C3=B6rg Otte <jrg.otte@gmail.com> wrote= : > 2015-06-28 18:09 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: >> On Sun, Jun 28, 2015 at 05:36:04PM +0200, J=C3=B6rg Otte wrote: >>> 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >>> > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >>> >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >>> >>> Hi Joerg, >>> >>> >>> >>>> Bluetooth is inoperable in current Linus tree and the >>> >>>> first bad commit is: >>> >>>> >>> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >>> >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >>> >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> >>> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 >>> >>>> >>> >>>> Bluetooth: Stop sabotaging list poisoning >>> >>>> >>> >>>> list_del() poisons pointers with special values, no need to ove= rwrite them. >>> >>>> >>> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >>> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >>> >>>> >>> >>>> My BT adapter is an intel 8087:07da >>> >>>> I reverted that commit and this fixed the problem for me. >>> >>> >>> >>> today we had a patch from Tedd fixing the list initialization in th= e HIDP code. >>> >>> >>> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >>> >>> index 9070dfd6b4ad..f1a117f8cad2 100644 >>> >>> --- a/net/bluetooth/hidp/core.c >>> >>> +++ b/net/bluetooth/hidp/core.c >>> >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session= **out, const bdaddr_t *bdaddr, >>> >>> session->conn =3D l2cap_conn_get(conn); >>> >>> session->user.probe =3D hidp_session_probe; >>> >>> session->user.remove =3D hidp_session_remove; >>> >>> + INIT_LIST_HEAD(&session->user.list); >>> >>> session->ctrl_sock =3D ctrl_sock; >>> >>> session->intr_sock =3D intr_sock; >>> >>> skb_queue_head_init(&session->ctrl_transmit); >>> >>> >>> >>> Could this be fixing it for you as well? >>> >>> >>> >> I will check this when I am at home in the >>> >> afternoon. >>> >> >>> > >>> > The patch works for me too. >>> > >>> Ok, this was a little bit hasty! >>> I now see the following additional problems: >>> >>> - System freeze on resume (occures always). >>> - System freeze on shutdown (occures sometimes) >>> - System freeze when BT-mouse is connecting (occures sometimes). >>> >>> Then I can't do anything except power off. >>> >>> This happens only if Bluetooth AND BT-mouse is activated. >> >> OK, what happens if you just revert only list_del patch? > > I have applied this patch: > > diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c > index 9070dfd6b4ad..f1a117f8cad2 100644 > --- a/net/bluetooth/hidp/core.c > +++ b/net/bluetooth/hidp/core.c > @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session > **out, const bdaddr_t *bdaddr, > session->conn =3D l2cap_conn_get(conn); > session->user.probe =3D hidp_session_probe; > session->user.remove =3D hidp_session_remove; > + INIT_LIST_HEAD(&session->user.list); > session->ctrl_sock =3D ctrl_sock; > session->intr_sock =3D intr_sock; > skb_queue_head_init(&session->ctrl_transmit); > > without this patch bluetooth doesn't work at all for me. Sure. Please drop this patch, and do git-revert 835a6a2f8603237a3e6cded5a6765090ecb06ea5 Maybe it's some other changes causing hangs. ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-29 10:30 ` Alexey Dobriyan @ 2015-06-29 14:37 ` Jörg Otte 2015-06-29 21:13 ` Tedd Ho-Jeong An 0 siblings, 1 reply; 13+ messages in thread From: Jörg Otte @ 2015-06-29 14:37 UTC (permalink / raw) To: Alexey Dobriyan Cc: Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-29 12:30 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: > On Mon, Jun 29, 2015 at 12:00 PM, J=C3=B6rg Otte <jrg.otte@gmail.com> wro= te: >> 2015-06-28 18:09 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: >>> On Sun, Jun 28, 2015 at 05:36:04PM +0200, J=C3=B6rg Otte wrote: >>>> 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >>>> > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >>>> >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: >>>> >>> Hi Joerg, >>>> >>> >>>> >>>> Bluetooth is inoperable in current Linus tree and the >>>> >>>> first bad commit is: >>>> >>>> >>>> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit >>>> >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >>>> >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> >>>> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 >>>> >>>> >>>> >>>> Bluetooth: Stop sabotaging list poisoning >>>> >>>> >>>> >>>> list_del() poisons pointers with special values, no need to ov= erwrite them. >>>> >>>> >>>> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >>>> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >>>> >>>> >>>> >>>> My BT adapter is an intel 8087:07da >>>> >>>> I reverted that commit and this fixed the problem for me. >>>> >>> >>>> >>> today we had a patch from Tedd fixing the list initialization in t= he HIDP code. >>>> >>> >>>> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >>>> >>> index 9070dfd6b4ad..f1a117f8cad2 100644 >>>> >>> --- a/net/bluetooth/hidp/core.c >>>> >>> +++ b/net/bluetooth/hidp/core.c >>>> >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_sessio= n **out, const bdaddr_t *bdaddr, >>>> >>> session->conn =3D l2cap_conn_get(conn); >>>> >>> session->user.probe =3D hidp_session_probe; >>>> >>> session->user.remove =3D hidp_session_remove; >>>> >>> + INIT_LIST_HEAD(&session->user.list); >>>> >>> session->ctrl_sock =3D ctrl_sock; >>>> >>> session->intr_sock =3D intr_sock; >>>> >>> skb_queue_head_init(&session->ctrl_transmit); >>>> >>> >>>> >>> Could this be fixing it for you as well? >>>> >>> >>>> >> I will check this when I am at home in the >>>> >> afternoon. >>>> >> >>>> > >>>> > The patch works for me too. >>>> > >>>> Ok, this was a little bit hasty! >>>> I now see the following additional problems: >>>> >>>> - System freeze on resume (occures always). >>>> - System freeze on shutdown (occures sometimes) >>>> - System freeze when BT-mouse is connecting (occures sometimes). >>>> >>>> Then I can't do anything except power off. >>>> >>>> This happens only if Bluetooth AND BT-mouse is activated. >>> >>> OK, what happens if you just revert only list_del patch? >> >> I have applied this patch: >> >> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >> index 9070dfd6b4ad..f1a117f8cad2 100644 >> --- a/net/bluetooth/hidp/core.c >> +++ b/net/bluetooth/hidp/core.c >> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session >> **out, const bdaddr_t *bdaddr, >> session->conn =3D l2cap_conn_get(conn); >> session->user.probe =3D hidp_session_probe; >> session->user.remove =3D hidp_session_remove; >> + INIT_LIST_HEAD(&session->user.list); >> session->ctrl_sock =3D ctrl_sock; >> session->intr_sock =3D intr_sock; >> skb_queue_head_init(&session->ctrl_transmit); >> >> without this patch bluetooth doesn't work at all for me. > > Sure. > > Please drop this patch, and do > > git-revert 835a6a2f8603237a3e6cded5a6765090ecb06ea5 > > Maybe it's some other changes causing hangs. Looks good so far. The system freeze on resume is gone. Thanks, J=C3=B6rg ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-29 14:37 ` Jörg Otte @ 2015-06-29 21:13 ` Tedd Ho-Jeong An 2015-06-30 14:58 ` Jörg Otte 0 siblings, 1 reply; 13+ messages in thread From: Tedd Ho-Jeong An @ 2015-06-29 21:13 UTC (permalink / raw) To: Jörg Otte Cc: Alexey Dobriyan, Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds Hi Jorg On Mon, 29 Jun 2015 16:37:32 +0200 J=C3=B6rg Otte <jrg.otte@gmail.com> wrote: > 2015-06-29 12:30 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: > > On Mon, Jun 29, 2015 at 12:00 PM, J=C3=B6rg Otte <jrg.otte@gmail.com> w= rote: > >> 2015-06-28 18:09 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: > >>> On Sun, Jun 28, 2015 at 05:36:04PM +0200, J=C3=B6rg Otte wrote: > >>>> 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: > >>>> > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: > >>>> >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>: > >>>> >>> Hi Joerg, > >>>> >>> > >>>> >>>> Bluetooth is inoperable in current Linus tree and the > >>>> >>>> first bad commit is: > >>>> >>>> > >>>> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad commit > >>>> >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 > >>>> >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> > >>>> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 > >>>> >>>> > >>>> >>>> Bluetooth: Stop sabotaging list poisoning > >>>> >>>> > >>>> >>>> list_del() poisons pointers with special values, no need to = overwrite them. > >>>> >>>> > >>>> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> > >>>> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> > >>>> >>>> > >>>> >>>> My BT adapter is an intel 8087:07da > >>>> >>>> I reverted that commit and this fixed the problem for me. > >>>> >>> > >>>> >>> today we had a patch from Tedd fixing the list initialization in= the HIDP code. > >>>> >>> > >>>> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core= .c > >>>> >>> index 9070dfd6b4ad..f1a117f8cad2 100644 > >>>> >>> --- a/net/bluetooth/hidp/core.c > >>>> >>> +++ b/net/bluetooth/hidp/core.c > >>>> >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_sess= ion **out, const bdaddr_t *bdaddr, > >>>> >>> session->conn =3D l2cap_conn_get(conn); > >>>> >>> session->user.probe =3D hidp_session_probe; > >>>> >>> session->user.remove =3D hidp_session_remove; > >>>> >>> + INIT_LIST_HEAD(&session->user.list); > >>>> >>> session->ctrl_sock =3D ctrl_sock; > >>>> >>> session->intr_sock =3D intr_sock; > >>>> >>> skb_queue_head_init(&session->ctrl_transmit); > >>>> >>> > >>>> >>> Could this be fixing it for you as well? > >>>> >>> > >>>> >> I will check this when I am at home in the > >>>> >> afternoon. > >>>> >> > >>>> > > >>>> > The patch works for me too. > >>>> > > >>>> Ok, this was a little bit hasty! > >>>> I now see the following additional problems: > >>>> > >>>> - System freeze on resume (occures always). > >>>> - System freeze on shutdown (occures sometimes) > >>>> - System freeze when BT-mouse is connecting (occures sometimes). > >>>> > >>>> Then I can't do anything except power off. > >>>> > >>>> This happens only if Bluetooth AND BT-mouse is activated. > >>> > >>> OK, what happens if you just revert only list_del patch? > >> > >> I have applied this patch: > >> > >> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c > >> index 9070dfd6b4ad..f1a117f8cad2 100644 > >> --- a/net/bluetooth/hidp/core.c > >> +++ b/net/bluetooth/hidp/core.c > >> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session > >> **out, const bdaddr_t *bdaddr, > >> session->conn =3D l2cap_conn_get(conn); > >> session->user.probe =3D hidp_session_probe; > >> session->user.remove =3D hidp_session_remove; > >> + INIT_LIST_HEAD(&session->user.list); > >> session->ctrl_sock =3D ctrl_sock; > >> session->intr_sock =3D intr_sock; > >> skb_queue_head_init(&session->ctrl_transmit); > >> > >> without this patch bluetooth doesn't work at all for me. > > > > Sure. > > > > Please drop this patch, and do > > > > git-revert 835a6a2f8603237a3e6cded5a6765090ecb06ea5 > > > > Maybe it's some other changes causing hangs. >=20 > Looks good so far. The system freeze on resume is gone. >=20 > Thanks, J=C3=B6rg Regarding the system hang issue, it looks like the problem is caused by the= list_del(). According to the list.h, this macro puts the entry into invalid state and i= t causes the device hang in the l2cap_core.c /** * list_del - deletes entry from list. * @entry: the element to delete from the list. * Note: list_empty() on entry does not return true after this, the ent= ry is * in an undefined state. */ =20 So, one way to fix this issue is using the list_del_init() instead. Can you try this patch to see if it resolve the issue? No need to revert an= y patch. I ran a quick test with a different scenarios and it looks good to me so fa= r. diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 51594fb..45fffa4 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -1634,7 +1634,7 @@ void l2cap_unregister_user(struct l2cap_conn *conn, s= truct l2cap_user *user) if (list_empty(&user->list)) goto out_unlock; =20 - list_del(&user->list); + list_del_init(&user->list); user->remove(conn, user); =20 out_unlock: @@ -1648,7 +1648,7 @@ static void l2cap_unregister_all_users(struct l2cap_c= onn *conn) =20 while (!list_empty(&conn->users)) { user =3D list_first_entry(&conn->users, struct l2cap_user, = list); - list_del(&user->list); + list_del_init(&user->list); user->remove(conn, user); } } Regards, Tedd Ho-Jeong An ^ permalink raw reply related [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-29 21:13 ` Tedd Ho-Jeong An @ 2015-06-30 14:58 ` Jörg Otte 2015-06-30 18:47 ` Tedd Ho-Jeong An 0 siblings, 1 reply; 13+ messages in thread From: Jörg Otte @ 2015-06-30 14:58 UTC (permalink / raw) To: Tedd Ho-Jeong An Cc: Alexey Dobriyan, Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds 2015-06-29 23:13 GMT+02:00 Tedd Ho-Jeong An <tedd.an@intel.com>: > Hi Jorg > > On Mon, 29 Jun 2015 16:37:32 +0200 > J=C3=B6rg Otte <jrg.otte@gmail.com> wrote: > >> 2015-06-29 12:30 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: >> > On Mon, Jun 29, 2015 at 12:00 PM, J=C3=B6rg Otte <jrg.otte@gmail.com> = wrote: >> >> 2015-06-28 18:09 GMT+02:00 Alexey Dobriyan <adobriyan@gmail.com>: >> >>> On Sun, Jun 28, 2015 at 05:36:04PM +0200, J=C3=B6rg Otte wrote: >> >>>> 2015-06-26 16:28 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >> >>>> > 2015-06-26 12:03 GMT+02:00 J=C3=B6rg Otte <jrg.otte@gmail.com>: >> >>>> >> 2015-06-26 11:37 GMT+02:00 Marcel Holtmann <marcel@holtmann.org>= : >> >>>> >>> Hi Joerg, >> >>>> >>> >> >>>> >>>> Bluetooth is inoperable in current Linus tree and the >> >>>> >>>> first bad commit is: >> >>>> >>>> >> >>>> >>>> 835a6a2f8603237a3e6cded5a6765090ecb06ea5 is the first bad comm= it >> >>>> >>>> commit 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >> >>>> >>>> Author: Alexey Dobriyan <adobriyan@gmail.com> >> >>>> >>>> Date: Wed Jun 10 20:28:33 2015 +0300 >> >>>> >>>> >> >>>> >>>> Bluetooth: Stop sabotaging list poisoning >> >>>> >>>> >> >>>> >>>> list_del() poisons pointers with special values, no need to= overwrite them. >> >>>> >>>> >> >>>> >>>> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> >> >>>> >>>> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> >> >>>> >>>> >> >>>> >>>> My BT adapter is an intel 8087:07da >> >>>> >>>> I reverted that commit and this fixed the problem for me. >> >>>> >>> >> >>>> >>> today we had a patch from Tedd fixing the list initialization i= n the HIDP code. >> >>>> >>> >> >>>> >>> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/cor= e.c >> >>>> >>> index 9070dfd6b4ad..f1a117f8cad2 100644 >> >>>> >>> --- a/net/bluetooth/hidp/core.c >> >>>> >>> +++ b/net/bluetooth/hidp/core.c >> >>>> >>> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_ses= sion **out, const bdaddr_t *bdaddr, >> >>>> >>> session->conn =3D l2cap_conn_get(conn); >> >>>> >>> session->user.probe =3D hidp_session_probe; >> >>>> >>> session->user.remove =3D hidp_session_remove; >> >>>> >>> + INIT_LIST_HEAD(&session->user.list); >> >>>> >>> session->ctrl_sock =3D ctrl_sock; >> >>>> >>> session->intr_sock =3D intr_sock; >> >>>> >>> skb_queue_head_init(&session->ctrl_transmit); >> >>>> >>> >> >>>> >>> Could this be fixing it for you as well? >> >>>> >>> >> >>>> >> I will check this when I am at home in the >> >>>> >> afternoon. >> >>>> >> >> >>>> > >> >>>> > The patch works for me too. >> >>>> > >> >>>> Ok, this was a little bit hasty! >> >>>> I now see the following additional problems: >> >>>> >> >>>> - System freeze on resume (occures always). >> >>>> - System freeze on shutdown (occures sometimes) >> >>>> - System freeze when BT-mouse is connecting (occures sometimes). >> >>>> >> >>>> Then I can't do anything except power off. >> >>>> >> >>>> This happens only if Bluetooth AND BT-mouse is activated. >> >>> >> >>> OK, what happens if you just revert only list_del patch? >> >> >> >> I have applied this patch: >> >> >> >> diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c >> >> index 9070dfd6b4ad..f1a117f8cad2 100644 >> >> --- a/net/bluetooth/hidp/core.c >> >> +++ b/net/bluetooth/hidp/core.c >> >> @@ -915,6 +915,7 @@ static int hidp_session_new(struct hidp_session >> >> **out, const bdaddr_t *bdaddr, >> >> session->conn =3D l2cap_conn_get(conn); >> >> session->user.probe =3D hidp_session_probe; >> >> session->user.remove =3D hidp_session_remove; >> >> + INIT_LIST_HEAD(&session->user.list); >> >> session->ctrl_sock =3D ctrl_sock; >> >> session->intr_sock =3D intr_sock; >> >> skb_queue_head_init(&session->ctrl_transmit); >> >> >> >> without this patch bluetooth doesn't work at all for me. >> > >> > Sure. >> > >> > Please drop this patch, and do >> > >> > git-revert 835a6a2f8603237a3e6cded5a6765090ecb06ea5 >> > >> > Maybe it's some other changes causing hangs. >> >> Looks good so far. The system freeze on resume is gone. >> >> Thanks, J=C3=B6rg > > Regarding the system hang issue, it looks like the problem is caused by t= he list_del(). > According to the list.h, this macro puts the entry into invalid state and= it causes the device hang in the l2cap_core.c > > /** > * list_del - deletes entry from list. > * @entry: the element to delete from the list. > * Note: list_empty() on entry does not return true after this, the e= ntry is > * in an undefined state. > */ > > So, one way to fix this issue is using the list_del_init() instead. > > Can you try this patch to see if it resolve the issue? No need to revert = any patch. > I ran a quick test with a different scenarios and it looks good to me so = far. > > diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c > index 51594fb..45fffa4 100644 > --- a/net/bluetooth/l2cap_core.c > +++ b/net/bluetooth/l2cap_core.c > @@ -1634,7 +1634,7 @@ void l2cap_unregister_user(struct l2cap_conn *conn,= struct l2cap_user *user) > if (list_empty(&user->list)) > goto out_unlock; > > - list_del(&user->list); > + list_del_init(&user->list); > user->remove(conn, user); > > out_unlock: > @@ -1648,7 +1648,7 @@ static void l2cap_unregister_all_users(struct l2cap= _conn *conn) > > while (!list_empty(&conn->users)) { > user =3D list_first_entry(&conn->users, struct l2cap_user= , list); > - list_del(&user->list); > + list_del_init(&user->list); > user->remove(conn, user); > } > } > > Regards, > Tedd Ho-Jeong An I now have both patche applied and no revert. Looks good so far. Thanks, J=C3=B6rg ^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [4.1.0-07254-gc13c810] Regression: Bluetooth not working. 2015-06-30 14:58 ` Jörg Otte @ 2015-06-30 18:47 ` Tedd Ho-Jeong An 0 siblings, 0 replies; 13+ messages in thread From: Tedd Ho-Jeong An @ 2015-06-30 18:47 UTC (permalink / raw) To: Jörg Otte Cc: Alexey Dobriyan, Marcel Holtmann, Johan Hedberg, bluez mailin list (linux-bluetooth@vger.kernel.org), inux Kernel Mailing List, Linus Torvalds Hi J=C3=B6rg On Tue, 30 Jun 2015 16:58:13 +0200 J=C3=B6rg Otte <jrg.otte@gmail.com> wrote: > > Regarding the system hang issue, it looks like the problem is caused by= the list_del(). > > According to the list.h, this macro puts the entry into invalid state a= nd it causes the device hang in the l2cap_core.c > > > > /** > > * list_del - deletes entry from list. > > * @entry: the element to delete from the list. > > * Note: list_empty() on entry does not return true after this, the= entry is > > * in an undefined state. > > */ > > > > So, one way to fix this issue is using the list_del_init() instead. > > > > Can you try this patch to see if it resolve the issue? No need to rever= t any patch. > > I ran a quick test with a different scenarios and it looks good to me s= o far. > > > > diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c > > index 51594fb..45fffa4 100644 > > --- a/net/bluetooth/l2cap_core.c > > +++ b/net/bluetooth/l2cap_core.c > > @@ -1634,7 +1634,7 @@ void l2cap_unregister_user(struct l2cap_conn *con= n, struct l2cap_user *user) > > if (list_empty(&user->list)) > > goto out_unlock; > > > > - list_del(&user->list); > > + list_del_init(&user->list); > > user->remove(conn, user); > > > > out_unlock: > > @@ -1648,7 +1648,7 @@ static void l2cap_unregister_all_users(struct l2c= ap_conn *conn) > > > > while (!list_empty(&conn->users)) { > > user =3D list_first_entry(&conn->users, struct l2cap_us= er, list); > > - list_del(&user->list); > > + list_del_init(&user->list); > > user->remove(conn, user); > > } > > } > > > > Regards, > > Tedd Ho-Jeong An >=20 > I now have both patche applied and no revert. Looks good so far. >=20 > Thanks, J=C3=B6rg Thanks for testing the patch. I submitted the patch just in case. Now, I am tossing the ball to Marcel. :) Regards, Tedd ^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2015-06-30 18:47 UTC | newest] Thread overview: 13+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2015-06-26 9:27 [4.1.0-07254-gc13c810] Regression: Bluetooth not working Jörg Otte 2015-06-26 9:37 ` Marcel Holtmann 2015-06-26 10:03 ` Jörg Otte 2015-06-26 10:27 ` Alexey Dobriyan 2015-06-26 14:28 ` Jörg Otte 2015-06-28 15:36 ` Jörg Otte 2015-06-28 16:09 ` Alexey Dobriyan 2015-06-29 9:00 ` Jörg Otte 2015-06-29 10:30 ` Alexey Dobriyan 2015-06-29 14:37 ` Jörg Otte 2015-06-29 21:13 ` Tedd Ho-Jeong An 2015-06-30 14:58 ` Jörg Otte 2015-06-30 18:47 ` Tedd Ho-Jeong An
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