* [PATCH] USB: host: hub: increase delay after device removal
@ 2016-12-28 15:29 Christoph Fritz
2017-01-09 8:38 ` Sascha Hauer
0 siblings, 1 reply; 6+ messages in thread
From: Christoph Fritz @ 2016-12-28 15:29 UTC (permalink / raw)
To: barebox
This patch increases delay time for slow hubs after device removal.
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
---
drivers/usb/core/hub.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index f44aea5..0854e3a 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -201,7 +201,7 @@ static void usb_hub_port_connect_change(struct usb_device *dev, int port)
if (dev->children[port] && !(portstatus & USB_PORT_STAT_ENABLE))
usb_remove_device(dev->children[port]);
- mdelay(200);
+ mdelay(500);
/* Reset the port */
if (hub_port_reset(dev, port, &portstatus) < 0) {
--
2.1.4
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] USB: host: hub: increase delay after device removal
2016-12-28 15:29 [PATCH] USB: host: hub: increase delay after device removal Christoph Fritz
@ 2017-01-09 8:38 ` Sascha Hauer
2018-05-17 16:19 ` Christoph Fritz
0 siblings, 1 reply; 6+ messages in thread
From: Sascha Hauer @ 2017-01-09 8:38 UTC (permalink / raw)
To: Christoph Fritz; +Cc: barebox
Hi Christoph,
On Wed, Dec 28, 2016 at 04:29:44PM +0100, Christoph Fritz wrote:
> This patch increases delay time for slow hubs after device removal.
Could you spent a few words what happens without this patch, i.e. how
the symptons look and which hardware you observed that? Without this
information it will be very hard to ever change this line again.
Sascha
>
> Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
> ---
> drivers/usb/core/hub.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
> index f44aea5..0854e3a 100644
> --- a/drivers/usb/core/hub.c
> +++ b/drivers/usb/core/hub.c
> @@ -201,7 +201,7 @@ static void usb_hub_port_connect_change(struct usb_device *dev, int port)
> if (dev->children[port] && !(portstatus & USB_PORT_STAT_ENABLE))
> usb_remove_device(dev->children[port]);
>
> - mdelay(200);
> + mdelay(500);
>
> /* Reset the port */
> if (hub_port_reset(dev, port, &portstatus) < 0) {
> --
> 2.1.4
>
>
>
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] USB: host: hub: increase delay after device removal
2017-01-09 8:38 ` Sascha Hauer
@ 2018-05-17 16:19 ` Christoph Fritz
2018-05-22 7:54 ` Sascha Hauer
0 siblings, 1 reply; 6+ messages in thread
From: Christoph Fritz @ 2018-05-17 16:19 UTC (permalink / raw)
To: barebox
Hi Sascha
On Mon, 2017-01-09 at 09:38 +0100, Sascha Hauer wrote:
> Hi Christoph,
>
> On Wed, Dec 28, 2016 at 04:29:44PM +0100, Christoph Fritz wrote:
> > This patch increases delay time for slow hubs after device removal.
>
> Could you spent a few words what happens without this patch, i.e. how
> the symptons look and which hardware you observed that? Without this
> information it will be very hard to ever change this line again.
>
> Sascha
>
> >
> > Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
> > ---
> > drivers/usb/core/hub.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
> > index f44aea5..0854e3a 100644
> > --- a/drivers/usb/core/hub.c
> > +++ b/drivers/usb/core/hub.c
> > @@ -201,7 +201,7 @@ static void usb_hub_port_connect_change(struct usb_device *dev, int port)
> > if (dev->children[port] && !(portstatus & USB_PORT_STAT_ENABLE))
> > usb_remove_device(dev->children[port]);
> >
> > - mdelay(200);
> > + mdelay(500);
> >
> > /* Reset the port */
> > if (hub_port_reset(dev, port, &portstatus) < 0) {
> > --
> > 2.1.4
While updating Barebox to a new version I stumbled upon this and did
some tests without the above patch applied:
# plug in a non certified USB device (which I suppose doesn't meet the init timing constrains,
# a certified one doesn't trigger the following error):
barebox:/ usb
usb: USB: scanning bus for devices...
usb: Bus 001 Device 001: ID 0000:0000 EHCI Host Controller
usb-hub usb1: hub_port_reset: resetting port 0...
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb-hub usb1: hub_port_reset: resetting port 0...
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: Bus 001 Device 002: ID 04b4:6560
usb-hub usb1-0: hub_port_reset: resetting port 2...
usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb-hub usb1-0: hub_port_reset: resetting port 2...
usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: Bus 001 Device 003: ID 10c4:ea60 CP2104 USB to UART Bridge Contr
usb: 3 USB Device(s) found
# now disconnect the USB device:
barebox:/ usb
usb: USB: scanning bus for devices...
usb1-0-0-2: removed
usb: 4 USB Device(s) found
# 4 USB Devices seems wrong, now connect the USB device again:
barebox@:/ usb
usb: USB: scanning bus for devices...
usb-hub usb1-0-0: hub_port_reset: resetting port 2...
usb-hub usb1-0-0: portstatus 103, change 10, 12 Mb/s
usb-hub usb1-0-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: 4 USB Device(s) found
# still 4 USB Devices found, ...?
# starting 'usb' again hits a NULL pointer dereference:
barebox@:/ usb
usb: USB: scanning bus for devices...
unable to handle NULL pointer dereference at address 0x00000004
pc : [<2fe1d432>] lr : [<2fe1e24b>]
sp : 2ffefcb8 ip : 00000016 fp : 00000001
r10: 00000100 r9 : 00000001 r8 : 201836b4
r7 : 201836cc r6 : 201859d0 r5 : 201859f4 r4 : 20184ee4
r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : 201859f4
Flags: nZCv IRQs off FIQs off Mode SVC_32
[<2fe1d432>] (usb_remove_device+0x4e/0x98) from [<2fe1e24b>] (usb_hub_detect+0x97/0x1bc)
[<2fe1e24b>] (usb_hub_detect+0x97/0x1bc) from [<2fe1e361>] (usb_hub_detect+0x1ad/0x1bc)
[<2fe4e855>] (unwind_backtrace+0x1/0x58) from [<2fe00b65>] (panic+0x1d/0x2c)
[<2fe00b65>] (panic+0x1d/0x2c) from [<2fe4ccd1>] (do_exception+0xd/0x10)
[<2fe4ccd1>] (do_exception+0xd/0x10) from [<2fe4cd31>] (do_data_abort+0x21/0x2c)
[<2fe4cd31>] (do_data_abort+0x21/0x2c) from [<2fe4c474>] (do_abort_6+0x48/0x54)
[<2fe4c474>] (do_abort_6+0x48/0x54) from [<00000000>] (0x0)
----
# on another hardware with a bit more debug output:
# just reset board, plug in USB device and start 'usb':
barebox@:/ usb
usb: USB: scanning bus for devices...
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb: set address 1
usb: usb_control_msg: request: 0x5, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x12
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x9
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x19
usb: get_conf_no 0 Result 25, wLength 25
usb: if 0, ep 0
usb: ##EP epmaxpacketin[1] = 2
usb: set configuration 1
usb: usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: new device: Mfr=1, Product=2, SerialNumber=0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x300 index 0x0 length 0xFF
usb: USB device number 1 default language ID 0x1
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x301 index 0x1 length 0xFF
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x302 index 0x1 length 0xFF
usb: Bus 001 Device 001: ID 0000:0000 EHCI Host Controller
usb: matching: 0x0000 0x0000
usb: matching: 0x0000 0x0000
usb: matching: 0x0000 0x0000
usb: match: 0x0000 0x0000
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x4
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x9
usb-hub usb1: 1 ports detected
usb-hub usb1: individual port power switching
usb-hub usb1: standalone hub
usb-hub usb1: global over-current protection
usb-hub usb1: power on to power good time: 20ms
usb-hub usb1: hub controller current requirement: 0mA
usb-hub usb1: port 1 is removable
usb: usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4
usb-hub usb1: get_hub_status returned status 1, change 8101
usb-hub usb1: local power source is lost (inactive)
usb-hub usb1: no over-current condition exists
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1: port 1 returns 0
usb-hub usb1: enabling power on all ports
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1: port 1 returns 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: Port 1 Status 101 Change 1
usb-hub usb1: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
usb-hub usb1: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb-hub usb1: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: set address 2
usb: usb_control_msg: request: 0x5, requesttype: 0x0, value 0x2 index 0x0 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x12
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x9
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x29
usb: get_conf_no 0 Result 41, wLength 41
usb: if 0, ep 0
usb: if 0, ep 1
usb: ##EP epmaxpacketin[1] = 1
usb: set configuration 1
usb: usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: new device: Mfr=0, Product=0, SerialNumber=0
usb: Bus 001 Device 002: ID 0424:2514
usb: matching: 0x0424 0x2514
usb: matching: 0x0424 0x2514
usb: matching: 0x0424 0x2514
usb: match: 0x0000 0x0000
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x4
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x9
usb-hub usb1-0: 4 ports detected
usb-hub usb1-0: individual port power switching
usb-hub usb1-0: standalone hub
usb-hub usb1-0: individual port over-current protection
usb-hub usb1-0: power on to power good time: 100ms
usb-hub usb1-0: hub controller current requirement: 1mA
usb-hub usb1-0: port 1 is removable
usb-hub usb1-0: port 2 is removable
usb-hub usb1-0: port 3 is removable
usb-hub usb1-0: port 4 is removable
usb: usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4
usb-hub usb1-0: get_hub_status returned status 0, change 0
usb-hub usb1-0: local power source is good
usb-hub usb1-0: no over-current condition exists
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1-0: port 1 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x2 length 0x0
usb-hub usb1-0: port 2 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x3 length 0x0
usb-hub usb1-0: port 3 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x4 length 0x0
usb-hub usb1-0: port 4 returns 0
usb-hub usb1-0: enabling power on all ports
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1-0: port 1 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x2 length 0x0
usb-hub usb1-0: port 2 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x3 length 0x0
usb-hub usb1-0: port 3 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x4 length 0x0
usb-hub usb1-0: port 4 returns 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: Port 1 Status 101 Change 1
usb-hub usb1-0: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
usb-hub usb1-0: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb: usb_new_device: usb_get_descriptor() failed with -110
usb-hub usb1-0: hub: disabling port 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x1 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x2 length 0x4
usb-hub usb1-0: Port 2 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x3 length 0x4
usb-hub usb1-0: Port 3 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x4 length 0x4
usb-hub usb1-0: Port 4 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: Port 1 Status 101 Change 1
usb-hub usb1-0: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
unable to handle NULL pointer dereference at address 0x00000004
pc : [<2fe1d48a>] lr : [<2fe1e651>]
sp : 2ffefce0 ip : 00000016 fp : 00000001
r10: 00000101 r9 : 00000001 r8 : 20183cd4
r7 : 00000000 r6 : 20185af0 r5 : 20185b14 r4 : 20185004
r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : 20185b14
Flags: nZCv IRQs off FIQs off Mode SVC_32
[<2fe1d48a>] (usb_remove_device+0x4e/0x98) from [<2fe1e651>] (usb_hub_detect+0x149/0x2b0)
[<2fe1e651>] (usb_hub_detect+0x149/0x2b0) from [<2fe1e771>] (usb_hub_detect+0x269/0x2b0)
[<2fe1e771>] (usb_hub_detect+0x269/0x2b0) from [<2fe1df47>] (usb_host_detect+0x3f/0x44)
[<2fe1df47>] (usb_host_detect+0x3f/0x44) from [<2fe1df6d>] (usb_rescan+0x21/0x48)
[<2fe1df6d>] (usb_rescan+0x21/0x48) from [<2fe3100d>] (do_usb+0x2d/0xa8)
[<2fe3100d>] (do_usb+0x2d/0xa8) from [<2fe02bc9>] (execute_command+0x21/0x48)
[<2fe02bc9>] (execute_command+0x21/0x48) from [<2fe06e2f>] (run_list_real+0x55b/0x618)
[<2fe06e2f>] (run_list_real+0x55b/0x618) from [<2fe067a5>] (parse_stream_outer+0xd9/0x164)
[<2fe067a5>] (parse_stream_outer+0xd9/0x164) from [<2fe0702b>] (run_shell+0x33/0x60)
[<2fe0702b>] (run_shell+0x33/0x60) from [<2fe0092d>] (start_barebox+0x6d/0x98)
[<2fe0092d>] (start_barebox+0x6d/0x98) from [<2fe4d377>] (barebox_non_pbl_start+0xd7/0xfc)
[<2fe4d377>] (barebox_non_pbl_start+0xd7/0xfc) from [<2fe00005>] (__bare_init_start+0x1/0xc)
[<2fe4ecb5>] (unwind_backtrace+0x1/0x58) from [<2fe00b65>] (panic+0x1d/0x2c)
[<2fe00b65>] (panic+0x1d/0x2c) from [<2fe4d131>] (do_exception+0xd/0x10)
[<2fe4d131>] (do_exception+0xd/0x10) from [<2fe4d191>] (do_data_abort+0x21/0x2c)
[<2fe4d191>] (do_data_abort+0x21/0x2c) from [<2fe4c8d4>] (do_abort_6+0x48/0x54)
[<2fe4c8d4>] (do_abort_6+0x48/0x54) from [<00000000>] (0x0)
_______________________________________________
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] USB: host: hub: increase delay after device removal
2018-05-17 16:19 ` Christoph Fritz
@ 2018-05-22 7:54 ` Sascha Hauer
2018-05-22 8:09 ` Christoph Fritz
0 siblings, 1 reply; 6+ messages in thread
From: Sascha Hauer @ 2018-05-22 7:54 UTC (permalink / raw)
To: Christoph Fritz; +Cc: barebox
On Thu, May 17, 2018 at 06:19:32PM +0200, Christoph Fritz wrote:
> Hi Sascha
>
> On Mon, 2017-01-09 at 09:38 +0100, Sascha Hauer wrote:
> > Hi Christoph,
> >
> barebox:/ usb
> usb: USB: scanning bus for devices...
> usb: Bus 001 Device 001: ID 0000:0000 EHCI Host Controller
> usb-hub usb1: hub_port_reset: resetting port 0...
> usb-hub usb1: portstatus 503, change 10, 480 Mb/s
> usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
> usb-hub usb1: hub_port_reset: resetting port 0...
> usb-hub usb1: portstatus 503, change 10, 480 Mb/s
> usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
> usb: Bus 001 Device 002: ID 04b4:6560
> usb-hub usb1-0: hub_port_reset: resetting port 2...
> usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
> usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
> usb-hub usb1-0: hub_port_reset: resetting port 2...
> usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
> usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
> usb: Bus 001 Device 003: ID 10c4:ea60 CP2104 USB to UART Bridge Contr
> usb: 3 USB Device(s) found
>
> # now disconnect the USB device:
>
> barebox:/ usb
> usb: USB: scanning bus for devices...
> usb1-0-0-2: removed
> usb: 4 USB Device(s) found
>
> # 4 USB Devices seems wrong, now connect the USB device again:
>
> barebox@:/ usb
> usb: USB: scanning bus for devices...
> usb-hub usb1-0-0: hub_port_reset: resetting port 2...
> usb-hub usb1-0-0: portstatus 103, change 10, 12 Mb/s
> usb-hub usb1-0-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
> usb: 4 USB Device(s) found
>
> # still 4 USB Devices found, ...?
> # starting 'usb' again hits a NULL pointer dereference:
Disconnecting USB devices during runtime of barebox is not really
supported. We should probably make that clear somewhere. The code is not
prepared for that case and trying to fix it is likely to be a bottomless
pit.
Can you reproduce a problem without removing a device?
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] USB: host: hub: increase delay after device removal
2018-05-22 7:54 ` Sascha Hauer
@ 2018-05-22 8:09 ` Christoph Fritz
2018-05-23 13:36 ` Sascha Hauer
0 siblings, 1 reply; 6+ messages in thread
From: Christoph Fritz @ 2018-05-22 8:09 UTC (permalink / raw)
To: Sascha Hauer; +Cc: barebox
On Tue, 2018-05-22 at 09:54 +0200, Sascha Hauer wrote:
> On Thu, May 17, 2018 at 06:19:32PM +0200, Christoph Fritz wrote:
> > # still 4 USB Devices found, ...?
> > # starting 'usb' again hits a NULL pointer dereference:
>
> Disconnecting USB devices during runtime of barebox is not really
> supported. We should probably make that clear somewhere. The code is not
> prepared for that case and trying to fix it is likely to be a bottomless
> pit.
>
> Can you reproduce a problem without removing a device?
Yes I can, please see the scenario below.
But the USB device plugged in isn't USB certified and Linux-Kernel needs
the quirk too... so...?
# on another hardware with a bit more debug output:
# just reset board, plug in USB device and start 'usb':
barebox@:/ usb
usb: USB: scanning bus for devices...
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb: set address 1
usb: usb_control_msg: request: 0x5, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x12
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x9
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x19
usb: get_conf_no 0 Result 25, wLength 25
usb: if 0, ep 0
usb: ##EP epmaxpacketin[1] = 2
usb: set configuration 1
usb: usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: new device: Mfr=1, Product=2, SerialNumber=0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x300 index 0x0 length 0xFF
usb: USB device number 1 default language ID 0x1
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x301 index 0x1 length 0xFF
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x302 index 0x1 length 0xFF
usb: Bus 001 Device 001: ID 0000:0000 EHCI Host Controller
usb: matching: 0x0000 0x0000
usb: matching: 0x0000 0x0000
usb: matching: 0x0000 0x0000
usb: match: 0x0000 0x0000
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x4
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x9
usb-hub usb1: 1 ports detected
usb-hub usb1: individual port power switching
usb-hub usb1: standalone hub
usb-hub usb1: global over-current protection
usb-hub usb1: power on to power good time: 20ms
usb-hub usb1: hub controller current requirement: 0mA
usb-hub usb1: port 1 is removable
usb: usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4
usb-hub usb1: get_hub_status returned status 1, change 8101
usb-hub usb1: local power source is lost (inactive)
usb-hub usb1: no over-current condition exists
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1: port 1 returns 0
usb-hub usb1: enabling power on all ports
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1: port 1 returns 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: Port 1 Status 101 Change 1
usb-hub usb1: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
usb-hub usb1: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb-hub usb1: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1: portstatus 503, change 10, 480 Mb/s
usb-hub usb1: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: set address 2
usb: usb_control_msg: request: 0x5, requesttype: 0x0, value 0x2 index 0x0 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x12
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x9
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x29
usb: get_conf_no 0 Result 41, wLength 41
usb: if 0, ep 0
usb: if 0, ep 1
usb: ##EP epmaxpacketin[1] = 1
usb: set configuration 1
usb: usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0
usb: new device: Mfr=0, Product=0, SerialNumber=0
usb: Bus 001 Device 002: ID 0424:2514
usb: matching: 0x0424 0x2514
usb: matching: 0x0424 0x2514
usb: matching: 0x0424 0x2514
usb: match: 0x0000 0x0000
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x4
usb: usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length 0x9
usb-hub usb1-0: 4 ports detected
usb-hub usb1-0: individual port power switching
usb-hub usb1-0: standalone hub
usb-hub usb1-0: individual port over-current protection
usb-hub usb1-0: power on to power good time: 100ms
usb-hub usb1-0: hub controller current requirement: 1mA
usb-hub usb1-0: port 1 is removable
usb-hub usb1-0: port 2 is removable
usb-hub usb1-0: port 3 is removable
usb-hub usb1-0: port 4 is removable
usb: usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4
usb-hub usb1-0: get_hub_status returned status 0, change 0
usb-hub usb1-0: local power source is good
usb-hub usb1-0: no over-current condition exists
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1-0: port 1 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x2 length 0x0
usb-hub usb1-0: port 2 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x3 length 0x0
usb-hub usb1-0: port 3 returns 0
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x8 index 0x4 length 0x0
usb-hub usb1-0: port 4 returns 0
usb-hub usb1-0: enabling power on all ports
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0
usb-hub usb1-0: port 1 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x2 length 0x0
usb-hub usb1-0: port 2 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x3 length 0x0
usb-hub usb1-0: port 3 returns 0
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x4 length 0x0
usb-hub usb1-0: port 4 returns 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: Port 1 Status 101 Change 1
usb-hub usb1-0: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
usb-hub usb1-0: hub_port_reset: resetting port 0...
usb: usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 103, change 10, 12 Mb/s
usb-hub usb1-0: STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0
usb: usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x40
usb: usb_new_device: usb_get_descriptor() failed with -110
usb-hub usb1-0: hub: disabling port 1
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x1 index 0x1 length 0x0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x2 length 0x4
usb-hub usb1-0: Port 2 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x3 length 0x4
usb-hub usb1-0: Port 3 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x4 length 0x4
usb-hub usb1-0: Port 4 Status 100 Change 0
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: Port 1 Status 101 Change 1
usb-hub usb1-0: port 1 connection change
usb: usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
usb-hub usb1-0: portstatus 101, change 1, 12 Mb/s
usb: usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0
unable to handle NULL pointer dereference at address 0x00000004
pc : [<2fe1d48a>] lr : [<2fe1e651>]
sp : 2ffefce0 ip : 00000016 fp : 00000001
r10: 00000101 r9 : 00000001 r8 : 20183cd4
r7 : 00000000 r6 : 20185af0 r5 : 20185b14 r4 : 20185004
r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : 20185b14
Flags: nZCv IRQs off FIQs off Mode SVC_32
[<2fe1d48a>] (usb_remove_device+0x4e/0x98) from [<2fe1e651>] (usb_hub_detect+0x149/0x2b0)
[<2fe1e651>] (usb_hub_detect+0x149/0x2b0) from [<2fe1e771>] (usb_hub_detect+0x269/0x2b0)
[<2fe1e771>] (usb_hub_detect+0x269/0x2b0) from [<2fe1df47>] (usb_host_detect+0x3f/0x44)
[<2fe1df47>] (usb_host_detect+0x3f/0x44) from [<2fe1df6d>] (usb_rescan+0x21/0x48)
[<2fe1df6d>] (usb_rescan+0x21/0x48) from [<2fe3100d>] (do_usb+0x2d/0xa8)
[<2fe3100d>] (do_usb+0x2d/0xa8) from [<2fe02bc9>] (execute_command+0x21/0x48)
[<2fe02bc9>] (execute_command+0x21/0x48) from [<2fe06e2f>] (run_list_real+0x55b/0x618)
[<2fe06e2f>] (run_list_real+0x55b/0x618) from [<2fe067a5>] (parse_stream_outer+0xd9/0x164)
[<2fe067a5>] (parse_stream_outer+0xd9/0x164) from [<2fe0702b>] (run_shell+0x33/0x60)
[<2fe0702b>] (run_shell+0x33/0x60) from [<2fe0092d>] (start_barebox+0x6d/0x98)
[<2fe0092d>] (start_barebox+0x6d/0x98) from [<2fe4d377>] (barebox_non_pbl_start+0xd7/0xfc)
[<2fe4d377>] (barebox_non_pbl_start+0xd7/0xfc) from [<2fe00005>] (__bare_init_start+0x1/0xc)
[<2fe4ecb5>] (unwind_backtrace+0x1/0x58) from [<2fe00b65>] (panic+0x1d/0x2c)
[<2fe00b65>] (panic+0x1d/0x2c) from [<2fe4d131>] (do_exception+0xd/0x10)
[<2fe4d131>] (do_exception+0xd/0x10) from [<2fe4d191>] (do_data_abort+0x21/0x2c)
[<2fe4d191>] (do_data_abort+0x21/0x2c) from [<2fe4c8d4>] (do_abort_6+0x48/0x54)
[<2fe4c8d4>] (do_abort_6+0x48/0x54) from [<00000000>] (0x0)
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] USB: host: hub: increase delay after device removal
2018-05-22 8:09 ` Christoph Fritz
@ 2018-05-23 13:36 ` Sascha Hauer
0 siblings, 0 replies; 6+ messages in thread
From: Sascha Hauer @ 2018-05-23 13:36 UTC (permalink / raw)
To: Christoph Fritz; +Cc: barebox
On Tue, May 22, 2018 at 10:09:11AM +0200, Christoph Fritz wrote:
> On Tue, 2018-05-22 at 09:54 +0200, Sascha Hauer wrote:
> > On Thu, May 17, 2018 at 06:19:32PM +0200, Christoph Fritz wrote:
>
> > > # still 4 USB Devices found, ...?
> > > # starting 'usb' again hits a NULL pointer dereference:
> >
> > Disconnecting USB devices during runtime of barebox is not really
> > supported. We should probably make that clear somewhere. The code is not
> > prepared for that case and trying to fix it is likely to be a bottomless
> > pit.
> >
> > Can you reproduce a problem without removing a device?
>
> Yes I can, please see the scenario below.
> But the USB device plugged in isn't USB certified and Linux-Kernel needs
> the quirk too... so...?
What do the Linux guys say? Maybe someone comes up with a solution that
solves the issue without additional config options.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-05-23 13:36 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-12-28 15:29 [PATCH] USB: host: hub: increase delay after device removal Christoph Fritz
2017-01-09 8:38 ` Sascha Hauer
2018-05-17 16:19 ` Christoph Fritz
2018-05-22 7:54 ` Sascha Hauer
2018-05-22 8:09 ` Christoph Fritz
2018-05-23 13:36 ` Sascha Hauer
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