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SubjectUSB Serial device disconnect causes IRQ disable after using ehci_info
Hi
Alan
I have observed that IRQ status has changed to c028, how do I decode the irq status. This causes the IRQ disabled.Detailed log is below.

[ 469.393023] ehci_hcd 0000:00:1d.7: irq status c028 masked 20
[ 507.575453] ehci_hcd 0000:00:1d.7: irq status 600b masked 3
[ 507.575465] ehci_hcd 0000:00:1d.7: devpath 2 ep2in 3strikes

Thanks
Amruth p.v


--- On Mon, 8/25/08, amruth <amruth_pv@yahoo.com> wrote:

> From: amruth <amruth_pv@yahoo.com>
> Subject: USB Serial device disconnect causes IRQ disable after using ehci_info
> To: "Alan Stern" <stern@rowland.harvard.edu>
> Cc: "Oliver Neukum" <oliver@neukum.org>, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
> Date: Monday, August 25, 2008, 4:12 PM
> Hi
> Alan
>
> > That was the full-speed device. Does it make any
> > difference if you use
> > only one of them instead of both?
> >
> The problem is seen when both are used.
>
> > Try adding a statement saying:
> >
> >ehci_info(ehci, "irq status %x masked
> %x\n",
> > status,
> >status & INTR_MASK);
> >> to ehci-hcd.c inside ehci_irq(), just before the
> line that
> > does status &= INTR_MASK;
> >
> > Then let's see what happens.
> Here is the output after using ehci_info
>
> [ 310.517577] usbcore: registered new interface driver
> usbserial
> [ 310.519417] usbserial: USB Serial support registered for
> generic
> [ 310.521129] usbcore: registered new interface driver
> usbserial_generic
> [ 310.521141] usbserial: USB Serial Driver core
> [ 310.600476] usbserial: USB Serial support registered for
> TI USB 3410 1 port adapter
> [ 310.602481] usbserial: USB Serial support registered for
> TI USB 5052 2 port adapter
> [ 310.602481] usbcore: registered new interface driver
> ti_usb_3410_5052
> [ 310.602481] ti_usb_3410_5052: TI USB 3410/5052 Serial
> Driver v0.9
> [ 416.344945] ehci_hcd 0000:00:1d.7: irq status c masked 4
> [ 416.344982] hub 5-0:1.0: state 7 ports 8 chg 0000 evt
> 0020
> [ 416.344994] ehci_hcd 0000:00:1d.7: GetStatus port 5
> status 001803 POWER sig=j CSC CONNECT
> [ 416.345005] hub 5-0:1.0: port 5, status 0501, change
> 0001, 480 Mb/s
> [ 416.448335] hub 5-0:1.0: debounce: port 5: total 100ms
> stable 100ms status 0x501
> [ 416.499523] ehci_hcd 0000:00:1d.7: port 5 full speed
> --> companion
> [ 416.499533] ehci_hcd 0000:00:1d.7: GetStatus port 5
> status 003801 POWER OWNER sig=j CONNECT
> [ 416.499547] usb usb3: wakeup_rh (auto-start)
> [ 416.499565] hub 5-0:1.0: port 5 not reset yet, waiting
> 50ms
> [ 416.503458] ehci_hcd 0000:00:1d.7: irq status c masked 4
> [ 416.550314] ehci_hcd 0000:00:1d.7: GetStatus port 5
> status 003002 POWER OWNER sig=se0 CSC
> [ 416.550353] hub 3-0:1.0: state 7 ports 2 chg 0000 evt
> 0002
> [ 416.550366] uhci_hcd 0000:00:1d.2: port 1 portsc 0093,00
> [ 416.550379] hub 3-0:1.0: port 1, status 0101, change
> 0001, 12 Mb/s
> [ 416.654286] hub 3-0:1.0: debounce: port 1: total 100ms
> stable 100ms status 0x101
> [ 416.756259] usb 3-1: new full speed USB device using
> uhci_hcd and address 2
> [ 416.876237] usb 3-1: ep0 maxpacket = 8
> [ 416.899501] usb 3-1: default language 0x0409
> [ 416.914558] usb 3-1: uevent
> [ 416.914605] usb 3-1: usb_probe_device
> [ 416.914612] usb 3-1: configuration #1 chosen from 1
> choice
> [ 416.917621] usb 3-1: adding 3-1:1.0 (config #1,
> interface 0)
> [ 416.917683] usb 3-1:1.0: uevent
> [ 416.917944] usbserial_generic 3-1:1.0:
> usb_probe_interface
> [ 416.917950] usbserial_generic 3-1:1.0:
> usb_probe_interface - got id
> [ 416.920536] drivers/usb/core/inode.c: creating file
> '002'
> [ 416.920736] usb 3-1: New USB device found,
> idVendor=0801, idProduct=000a
> [ 416.920742] usb 3-1: New USB device strings: Mfr=1,
> Product=2, SerialNumber=0
> [ 416.920749] usb 3-1: Product: IntelliStripe 65
> [ 416.920753] usb 3-1: Manufacturer: MagTek
> [ 416.920762] hub 5-0:1.0: state 7 ports 8 chg 0000 evt
> 0020
> [ 417.604928] usbserial: USB Serial support registered for
> Magtek 75/Excella USB card reader
> [ 417.606929] magtek 3-1:1.0: usb_probe_interface
> [ 417.606929] magtek 3-1:1.0: usb_probe_interface - got id
> [ 417.606929] magtek 3-1:1.0: Magtek 75/Excella USB card
> reader converter detected
> [ 417.606929] drivers/usb/serial/magtek.c: magtek_startup
> [ 417.606929] uhci_hcd 0000:00:1d.2: reserve dev 2
> ep81-INT, period 8, phase 4, 61 us
> [ 417.606929] drivers/usb/serial/magtek.c: magtek_startup
> - usb_submit_urb(int urb)
> [ 417.606929] usb 3-1: Magtek 75/Excella USB card reader
> converter now attached to ttyUSB0
> [ 417.607927] usbcore: registered new interface driver
> magtek
> [ 417.607927] magtek: v1.01 Amruth Vamadev
> [ 417.607927] magtek: MAGTEK 75/Excella check USB Chipcard
> Reader Driver
> [ 469.065999] ehci_hcd 0000:00:1d.7: irq status c masked 4
> [ 469.066035] hub 5-0:1.0: state 7 ports 8 chg 0000 evt
> 0004
> [ 469.066045] ehci_hcd 0000:00:1d.7: GetStatus port 2
> status 001803 POWER sig=j CSC CONNECT
> [ 469.066056] hub 5-0:1.0: port 2, status 0501, change
> 0001, 480 Mb/s
> [ 469.169441] hub 5-0:1.0: debounce: port 2: total 100ms
> stable 100ms status 0x501
> [ 469.220697] ehci_hcd 0000:00:1d.7: port 2 high speed
> [ 469.220708] ehci_hcd 0000:00:1d.7: GetStatus port 2
> status 001005 POWER sig=se0 PE CONNECT
> [ 469.271415] usb 5-2: new high speed USB device using
> ehci_hcd and address 4
> [ 469.272398] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.276912] ehci_hcd 0000:00:1d.7: irq status 8028
> masked 20
> [ 469.323607] ehci_hcd 0000:00:1d.7: port 2 high speed
> [ 469.323617] ehci_hcd 0000:00:1d.7: GetStatus port 2
> status 001005 POWER sig=se0 PE CONNECT
> [ 469.374478] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.374601] ehci_hcd 0000:00:1d.7: irq status 8028
> masked 20
> [ 469.387239] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387365] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387414] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387460] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387513] usb 5-2: default language 0x0409
> [ 469.387710] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387836] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.387960] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.388033] usb 5-2: uevent
> [ 469.388101] usb 5-2: usb_probe_device
> [ 469.388108] usb 5-2: configuration #1 chosen from 1
> choice
> [ 469.388211] ehci_hcd 0000:00:1d.7: irq status 8009
> masked 1
> [ 469.388336] usb 5-2: adding 5-2:1.0 (config #1,
> interface 0)
> [ 469.388385] usb 5-2:1.0: uevent
> [ 469.388429] usbserial_generic 5-2:1.0:
> usb_probe_interface
> [ 469.388435] usbserial_generic 5-2:1.0:
> usb_probe_interface - got id
> [ 469.388454] magtek 5-2:1.0: usb_probe_interface
> [ 469.388458] magtek 5-2:1.0: usb_probe_interface - got id
> [ 469.388496] magtek 5-2:1.0: Magtek 75/Excella USB card
> reader converter detected
> [ 469.388508] drivers/usb/serial/magtek.c: magtek_startup
> [ 469.388663] usb 5-2: link qh0-00ff/ded71100 start 0 [1/0
> us]
> [ 469.388719] drivers/usb/serial/magtek.c: magtek_startup
> - usb_submit_urb(int urb)
> [ 469.388835] usb 5-2: Magtek 75/Excella USB card reader
> converter now attached to ttyUSB1
> [ 469.389651] drivers/usb/core/inode.c: creating file
> '004'
> [ 469.389759] usb 5-2: New USB device found,
> idVendor=0801, idProduct=2231
> [ 469.389766] usb 5-2: New USB device strings: Mfr=1,
> Product=2, SerialNumber=3
> [ 469.389772] usb 5-2: Product: STX
> [ 469.389777] usb 5-2: Manufacturer: MagTek
> [ 469.389781] usb 5-2: SerialNumber: STX001
> [ 469.393023] ehci_hcd 0000:00:1d.7: irq status c028
> masked 20
> [ 507.575453] ehci_hcd 0000:00:1d.7: irq status 600b
> masked 3
> [ 507.575465] ehci_hcd 0000:00:1d.7: devpath 2 ep2in
> 3strikes
> [ 507.575470] drivers/usb/serial/magtek.c:
> magtek_read_int_callback - port 1
> [ 507.575484] usb 5-2: unlink qh0-00ff/ded71100 start 0
> [1/0 us]
> [ 507.576084] usb 5-2: link qh0-00ff/ded71100 start 0 [1/0
> us]
> [ 507.576548] usb 5-2: unlink qh0-00ff/ded71100 start 0
> [1/0 us]
> [ 507.576548] ehci_hcd 0000:00:1d.7: HC died; cleaning up
> [ 507.579131] hub 5-0:1.0: state 0 ports 8 chg 0000 evt
> 0000
> [ 507.579137] usb 5-2: USB disconnect, address 4
> [ 507.579141] usb 5-2: unregistering device
> [ 507.579145] usb 5-2: usb_disable_device nuking all URBs
> [ 507.579155] usb 5-2: unregistering interface 5-2:1.0
> [ 507.579261] drivers/usb/serial/magtek.c: magtek_shutdown
> [ 507.579418] magtek ttyUSB1: Magtek 75/Excella USB card
> reader converter now disconnected from ttyUSB1
> [ 507.579450] magtek 5-2:1.0: device disconnected
> [ 507.579464] usb 5-2:1.0: uevent
> [ 507.581083] usb 5-2: uevent
> [ 507.877032] irq 23: nobody cared (try booting with the
> "irqpoll" option)
> [ 507.877042] Pid: 0, comm: swapper Not tainted
> 2.6.26patched #2
> [ 507.877063] [<c044c0cc>]
> __report_bad_irq+0x2e/0x6f
> [ 507.877078] [<c044c2e4>]
> note_interrupt+0x1d7/0x20b
> [ 507.877089] [<c044b852>] ?
> handle_IRQ_event+0x21/0x48
> [ 507.877103] [<c044ca0f>]
> handle_fasteoi_irq+0x8b/0xac
> [ 507.877114] [<c044c984>] ?
> handle_fasteoi_irq+0x0/0xac
> [ 507.877123] [<c040598c>] do_IRQ+0xa9/0xd1
> [ 507.877131] [<c04025f2>] ? default_idle+0x0/0x42
> [ 507.877142] [<c040429b>]
> common_interrupt+0x23/0x28
> [ 507.877148] [<c04025f2>] ? default_idle+0x0/0x42
> [ 507.877167] [<c040261f>] ? default_idle+0x2d/0x42
> [ 507.877178] [<c040256d>] cpu_idle+0x8b/0x9f
> [ 507.877187] [<c0610d62>] rest_init+0x4e/0x50
> [ 507.877204] =======================
> [ 507.877207] handlers:
> [ 507.877209] [<c057649d>] (usb_hcd_irq+0x0/0x58)
> [ 507.877217] Disabling IRQ #23
>
>
> Thanks
> Amruth p.v
>
>
> --- On Mon, 8/25/08, Alan Stern
> <stern@rowland.harvard.edu> wrote:
>
> > From: Alan Stern <stern@rowland.harvard.edu>
> > Subject: Re: USB Serial device disconnect causes IRQ
> disable not working after patch
> > To: "amruth" <amruth_pv@yahoo.com>
> > Cc: "Oliver Neukum"
> <oliver@neukum.org>, linux-usb@vger.kernel.org,
> linux-kernel@vger.kernel.org
> > Date: Monday, August 25, 2008, 1:50 PM
> > On Mon, 25 Aug 2008, amruth wrote:
> >
> > > Hi
> > > Alan
> > > The patch suggested by you did not work. I tried
> in
> > another computer and found same issue. I have detailed
> log
> > below.
> >
> > This log shows you have 2 Magtek devices: one running
> at
> > high speed and
> > one running at full speed:
> >
> > > [ 143.041808] hub 1-0:1.0: state 7 ports 6 chg
> 0000
> > evt 0002
> > > [ 143.041808] ehci_hcd 0000:00:1d.7: GetStatus
> port 1
> > status 001803 POWER sig=j CSC CONNECT
> > > [ 143.041808] hub 1-0:1.0: port 1, status 0501,
> > change 0001, 480 Mb/s
> > > [ 143.168024] hub 1-0:1.0: debounce: port 1:
> total
> > 100ms stable 100ms status 0x501
> > > [ 143.224309] ehci_hcd 0000:00:1d.7: port 1 high
> > speed
> > > [ 143.224323] ehci_hcd 0000:00:1d.7: GetStatus
> port 1
> > status 001005 POWER sig=se0 PE CONNECT
> > > [ 143.280021] usb 1-1: new high speed USB device
> > using ehci_hcd and address 4
> > > [ 143.336281] ehci_hcd 0000:00:1d.7: port 1 high
> > speed
> > > [ 143.336292] ehci_hcd 0000:00:1d.7: GetStatus
> port 1
> > status 001005 POWER sig=se0 PE CONNECT
> > > [ 143.412650] usb 1-1: default language 0x0409
> > > [ 143.413121] usb 1-1: uevent
> > > [ 143.417056] usb 1-1: usb_probe_device
> > > [ 143.417068] usb 1-1: configuration #1 chosen
> from 1
> > choice
> > > [ 143.417361] usb 1-1: adding 1-1:1.0 (config
> #1,
> > interface 0)
> > > [ 143.417422] usb 1-1:1.0: uevent
> > > [ 143.417622] usbserial_generic 1-1:1.0:
> > usb_probe_interface
> > > [ 143.417627] usbserial_generic 1-1:1.0:
> > usb_probe_interface - got id
> > > [ 143.417646] magtek 1-1:1.0:
> usb_probe_interface
> > > [ 143.417650] magtek 1-1:1.0:
> usb_probe_interface -
> > got id
> > > [ 143.417659] magtek 1-1:1.0: Magtek 75/Excella
> USB
> > card reader converter detected
> >
> > That was the high-speed device.
> >
> > > [ 148.765273] hub 1-0:1.0: state 7 ports 6 chg
> 0000
> > evt 0004
> > > [ 148.765273] ehci_hcd 0000:00:1d.7: GetStatus
> port 2
> > status 001803 POWER sig=j CSC CONNECT
> > > [ 148.765273] hub 1-0:1.0: port 2, status 0501,
> > change 0001, 480 Mb/s
> > > [ 148.892021] hub 1-0:1.0: debounce: port 2:
> total
> > 100ms stable 100ms status 0x501
> > > [ 148.948172] ehci_hcd 0000:00:1d.7: port 2 full
> > speed --> companion
> > > [ 148.948184] ehci_hcd 0000:00:1d.7: GetStatus
> port 2
> > status 003801 POWER OWNER sig=j CONNECT
> > > [ 148.948201] usb usb2: wakeup_rh (auto-start)
> > > [ 148.948222] hub 1-0:1.0: port 2 not reset yet,
> > waiting 50ms
> > > [ 149.004019] ehci_hcd 0000:00:1d.7: GetStatus
> port 2
> > status 003002 POWER OWNER sig=se0 CSC
> > > [ 149.004054] hub 2-0:1.0: state 7 ports 2 chg
> 0000
> > evt 0004
> > > [ 149.004065] uhci_hcd 0000:00:1d.0: port 2
> portsc
> > 0093,00
> > > [ 149.004075] hub 2-0:1.0: port 2, status 0101,
> > change 0001, 12 Mb/s
> > > [ 149.132021] hub 2-0:1.0: debounce: port 2:
> total
> > 100ms stable 100ms status 0x101
> > > [ 149.244042] usb 2-2: new full speed USB device
> > using uhci_hcd and address 2
> > > [ 149.376015] usb 2-2: ep0 maxpacket = 8
> > > [ 149.399097] usb 2-2: default language 0x0409
> > > [ 149.408004] usb 2-2: uevent
> > > [ 149.418007] usb 2-2: usb_probe_device
> > > [ 149.418019] usb 2-2: configuration #1 chosen
> from 1
> > choice
> > > [ 149.421042] usb 2-2: adding 2-2:1.0 (config
> #1,
> > interface 0)
> > > [ 149.421112] usb 2-2:1.0: uevent
> > > [ 149.421158] usbserial_generic 2-2:1.0:
> > usb_probe_interface
> > > [ 149.421163] usbserial_generic 2-2:1.0:
> > usb_probe_interface - got id
> > > [ 149.421182] magtek 2-2:1.0:
> usb_probe_interface
> > > [ 149.421186] magtek 2-2:1.0:
> usb_probe_interface -
> > got id
> > > [ 149.421193] magtek 2-2:1.0: Magtek 75/Excella
> USB
> > card reader converter detected
> >
> > That was the full-speed device. Does it make any
> > difference if you use
> > only one of them instead of both?
> >
> > > [ 185.704529] irq 23: nobody cared (try booting
> with
> > the "irqpoll" option)
> > > [ 185.704529] Pid: 3505, comm: automount Not
> tainted
> > 2.6.26-KGDB #1
> > > [ 185.704529] [<c013fe84>]
> > __report_bad_irq+0x2e/0x6f
> > > [ 185.704529] [<c0140098>]
> > note_interrupt+0x1d3/0x207
> > > [ 185.704529] [<c013f60e>] ?
> > handle_IRQ_event+0x21/0x48
> > > [ 185.704529] [<c01407c0>]
> > handle_fasteoi_irq+0x8a/0xaa
> > > [ 185.704529] [<c01056f2>]
> do_IRQ+0x71/0x8b
> > > [ 185.704529] [<c010416b>]
> > common_interrupt+0x23/0x28
> > > [ 185.704529] [<c012007b>] ?
> > prof_cpu_mask_write_proc+0xf/0x2f
> > > [ 185.704529] [<c0103747>] ?
> > sysenter_past_esp+0x38/0x91
> > > [ 185.704529] =======================
> > > [ 185.704529] handlers:
> > > [ 185.704529] [<c03428d9>]
> > (usb_hcd_irq+0x0/0x58)
> >
> > Try adding a statement saying:
> >
> > ehci_info(ehci, "irq status %x masked
> %x\n",
> > status,
> > status & INTR_MASK);
> >
> > to ehci-hcd.c inside ehci_irq(), just before the line
> that
> > does
> >
> > status &= INTR_MASK;
> >
> > Then let's see what happens.
> >
> > Alan Stern
> >
> > --
> > To unsubscribe from this list: send the line
> > "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at
> > http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at http://www.tux.org/lkml/
>
>
>
>
> --
> To unsubscribe from this list: send the line
> "unsubscribe linux-kernel" in
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