On Wed, 6 Feb 2013, Felipe Balbi wrote: > Hi, > > On Wed, Feb 06, 2013 at 05:27:52PM +0530, Vivek Gautam wrote: > > Hi Tony, > > > > > > On Fri, Oct 5, 2012 at 9:57 PM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > > * Tony Lindgren <tony@xxxxxxxxxxx> [121004 18:41]: > > >> > > > >> > > Also on the EHCI port, I've seen issues where unplugging > > >> > > the cable hangs kernel with an infinite loop. But that happens > > >> > > only occasionally, sorry does not seem to happen right > > >> > > now so no output to paste here. Or maybe this issue > > >> > > has already been fixed? > > > > > > Looks like the system eventually recovers from the EHCI issue > > > after about fivew minutes or so of spamming the logs. It seems > > > the ehci-omap errors are: > > > > > > [62934.201538] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 31 > > > [62934.201660] ehci-omap ehci-omap.0: devpath 1.3.7 ep0out 3strikes > > > [62934.201873] ehci-omap ehci-omap.0: reused qh ea5632c0 schedule > > > > > > More data below. > > > > > > > Is this issue fixed ? > > Actually we too are getting very similar issue with samsung exynos5250 hardware. > > With latest 'usb-next' kernel and supporting arch patches, when i use > > following test scenerio: > > Connect a USB 2.0 external hub to USB 2.0 port, and connect mice or > > keyboard enumeration and > > functionality is fine but once disconnecting the HID we get to see the > > error log: > > hid-generic 0003:04B3:3025.0002: can't reset device, > > s5p-ehci-1.3/input0, status -71 > > > > When i tried to enable CONFIG_USB_DEBUG, get the following log: > > looks like it's not OMAP-specific. Alan any tips ? It could be a problem with the hub the keyboard is plugged into. Or something going on with the hub driver. I'll try doing the same thing on my system. > (keeping logs below) ... > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 1 > > usb 1-1.3: unlink qh8-0e01/c193f140 start 2 [1/2 us] > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 1 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 2 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 3 > > hub 1-1:1.0: state 7 ports 7 chg 0000 evt 0008 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 4 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 5 > > hub 1-1:1.0: port 3, status 0100, change 0001, 12 Mb/s > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 6 > > usb 1-1.3: USB disconnect, device number 5 > > usb 1-1.3: unregistering device > > usb 1-1.3: unregistering interface 1-1.3:1.0 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 7 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 8 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 9 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 10 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 11 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 12 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 13 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 14 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 15 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 16 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 17 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 18 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 19 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 20 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 21 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 22 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 23 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 24 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 25 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 26 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 27 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 28 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 29 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 30 > > s5p-ehci s5p-ehci: detected XactErr len 0/8 retry 31 > > s5p-ehci s5p-ehci: devpath 1.3 ep0out 3strikes > > usb 1-1: clear tt buffer port 3, a5 ep0 t00080248 > > hid-generic 0003:04B3:3025.0002: can't reset device, > > s5p-ehci-1.3/input0, status -71 Note that most of these are debug messages, so they wouldn't normally appear. (BTW: timestamps would be nice -- CONFIG_PRINTK_TIME.) > > Similar log as you get on ehci-omap ;-) > > Sorry i might have missed some information to put here. > > > > Your help will be very much useful. > > Thanks in advance :-) > > > > > ... > > > [62927.200012] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 19 > > > [62927.215606] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 25 > > > [62927.220092] ehci-omap ehci-omap.0: detected XactErr len 0/8 retry 22 > > > [62927.225738] ehci-omap ehci-omap.0: devpath 1.3.7 ep0out 3strikes A certain amount of this is normal when an HID device is unplugged. It should stop after 250 ms, however, when the hub notifies the host that a cable has been unplugged. (Unless the hub driver is busy doing something else at the time...) > > > ... > > > > > > After waiting for several minutes, it stops, and dmesg shows: > > > > > > # dmesg | grep -i omap This grep will drop the important information. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
