Hi,
>
> I am writing USB driver in slackware 10.2, i.e. 2.4.31 kernel. My USB
> device has 3 bulk endpoints. One bulk-out and 2 bulk-in. i am using
> devfs file system to create device node for this device. When i
> initially connect the device, everything works properly. But when i
> disconnect the device( when an application on this device node is open)
> suddenly and connect it again disconnect()function is called but probe()
> function is not called. I verified the code of releasing the resources
> in disconnect and close. i felt its proper.
I enabled the USB debugging in the kernel configuration
The log message is as follows
in ehci-hcd init
PCI: Found IRQ 11 for device 00:1d.7
PCI: Sharing IRQ 11 with 00:1d.0
PCI: Setting latency timer of device 00:1d.7 to 64
ehci_hcd 00:1d.7: PCI device 8086:265c (Intel Corp.)
ehci_hcd 00:1d.7: irq 11, pci mem e02aa000
usb.c: new USB bus registered, assigned bus number 1
ehci_hcd 00:1d.7: ehci_start hcs_params 0x104208 dbg=1 cc=4 pcc=2 ordered !ppc
ports=8
ehci_hcd 00:1d.7: ehci_start hcc_params 6871 thresh 7 uframes 1024 64 bit addr
ehci_hcd 00:1d.7: capability 0001 at 68
ehci_hcd 00:1d.7: reset command 080002 (park)=0 ithresh=8 period=1024 Reset HALT
ehci_hcd 00:1d.7: enabled 64bit PCI DMA
PCI: cache line size of 128 is not supported by device 00:1d.7
ehci_hcd 00:1d.7: init command 010001 (park)=0 ithresh=1 period=1024 RUN
ehci_hcd 00:1d.7: USB 2.0 enabled, EHCI 1.00, driver 2003-Dec-29/2.4
hcd.c: 00:1d.7 root hub device address 1
usb.c: kmalloc IF d47268e0, numif 1
usb.c: new device strings: Mfr=3, Product=2, SerialNumber=1
usb.c: USB device number 1 default language ID 0x0
Manufacturer: Linux 2.4.31-devfs ehci_hcd
Product: PCI device 8086:265c (Intel Corp.)
SerialNumber: 00:1d.7
hub.c: USB hub found
hub.c: 8 ports detected
hub.c: standalone hub
hub.c: ganged power switching
hub.c: individual port over-current protection
hub.c: Single TT
hub.c: TT requires at most 8 FS bit times
hub.c: Port indicators are not supported
hub.c: power on to power good time: 20ms
hub.c: hub controller current requirement: 0mA
hub.c: port removable status: RRRRRRRR
hub.c: local power source is good
hub.c: no over-current condition exists
hub.c: enabling power on all ports
usb.c: hub driver claimed interface d47268e0
usb.c: kusbd: /sbin/hotplug add 1
In usb_scanner_init --->
usb.c: registered new driver AAA Scanner
minor=======>>>>>>>> 0
hub.c: port 1, portstatus 100, change 0, 12 Mb/s
hub.c: port 2, portstatus 100, change 0, 12 Mb/s
hub.c: port 3, portstatus 100, change 0, 12 Mb/s
hub.c: port 4, portstatus 100, change 0, 12 Mb/s
hub.c: port 5, portstatus 100, change 0, 12 Mb/s
hub.c: port 6, portstatus 100, change 0, 12 Mb/s
hub.c: port 7, portstatus 100, change 0, 12 Mb/s
ehci_hcd 00:1d.7: GetStatus port 8 status 001803 POWER sig=j CSC CONNECT
hub.c: port 8, portstatus 501, change 1, 480 Mb/s
hub.c: port 8 connection change
hub.c: port 8, portstatus 501, change 1, 480 Mb/s
hub.c: port 8, portstatus 501, change 0, 480 Mb/s
hub.c: port 8, portstatus 501, change 0, 480 Mb/s
hub.c: port 8, portstatus 501, change 0, 480 Mb/s
hub.c: port 8, portstatus 501, change 0, 480 Mb/s
hub.c: port 8, portstatus 511, change 0, 480 Mb/s
hub.c: port 8 of hub 1 not reset yet, waiting 10ms
hub.c: port 8, portstatus 511, change 0, 480 Mb/s
hub.c: port 8 of hub 1 not reset yet, waiting 10ms
ehci_hcd 00:1d.7: port 8 high speed
ehci_hcd 00:1d.7: GetStatus port 8 status 001005 POWER sig=se0 PE CONNECT
hub.c: port 8, portstatus 503, change 10, 480 Mb/s
hub.c: new USB device 00:1d.7-8, assigned address 2
usb.c: kmalloc IF d47269a0, numif 1
usb.c: new device strings: Mfr=1, Product=2, SerialNumber=0
usb.c: USB device number 2 default language ID 0x409
Manufacturer: AAA
Product: AAA
In scanner_probe --->
Vendor_id = 0xbd7
Product_id = 0xa002
EndpointAddress = 0x2
bmAttributes = 0x2
wMaxPacketSize= 0x200
Endpoint is Bulk
0 Its Out Endpoint --->
write_out_ep_addr = 0x2
EndpointAddress = 0x84
bmAttributes = 0x2
wMaxPacketSize= 0x200
Endpoint is Bulk
1 Its in Endpoint -->
Command endpoint
cmd_in_ep_addr = 0x4
EndpointAddress = 0x86
bmAttributes = 0x2
wMaxPacketSize= 0x200
Endpoint is Bulk
2 Its in Endpoint -->
Bulk_in_ep_addr = 0x6
In alloc_all_urbs --->
name of device node = AAA3
usb.c: AAA Scanner driver claimed interface d47269a0
usb.c: kusbd: /sbin/hotplug add 2
in scanner_open--->
submitted img_urb, res = 0
submitted cmd_urb, res = 0
In scanner_ioct
In IOCTL_PS3_WRITE_SIZES
Transfer buffers allocated 1281
In scanner_ioct
In IOCTL_PS3_CLEAN_MSGS
In scanner_ioct
In IOCTL_PS3_SCANNER_COMMAND
Occupied slots = 0x0
Total_slots = 0xa
Occupied_img_slot = 0x0
In Write_command ---->
Len = 4
0x2 0x35 0x3 0x40
Submitting = 0x0
Submitted Successfully Command
in write_callback
Urb->status = 0x0
In scanner_ioct
In IOCTL_PS3_SCANNER_COMMAND
Occupied slots = 0x0
Total_slots = 0xa
Occupied_img_slot = 0x0
In Write_command ---->
Len = 4
0x2 0x36 0x3 0x40
Submitting = 0x0
Submitted Successfully Command
in write_callback
Urb->status = 0x0
ehci_hcd 00:1d.7: devpath 8 ep4in 3strikes
In command_callback
Urb->status = 0xffffffb9
Urb->actual_length = 0x0
ehci_hcd 00:1d.7: devpath 8 ep6in 3strikes
In image_callback
Urb status = 0xffffffb9
Urb actual_lenght = 0x0
======>>>>>>>>>>reclaim BUG
hub.c: port 1, portstatus 100, change 0, 12 Mb/s
hub.c: port 2, portstatus 100, change 0, 12 Mb/s
hub.c: port 3, portstatus 100, change 0, 12 Mb/s
hub.c: port 4, portstatus 100, change 0, 12 Mb/s
hub.c: port 5, portstatus 100, change 0, 12 Mb/s
hub.c: port 6, portstatus 100, change 0, 12 Mb/s
hub.c: port 7, portstatus 100, change 0, 12 Mb/s
ehci_hcd 00:1d.7: GetStatus port 8 status 001002 POWER sig=se0 CSC
hub.c: port 8, portstatus 100, change 1, 12 Mb/s
hub.c: port 8 connection change
hub.c: port 8, portstatus 100, change 1, 12 Mb/s
usb.c: USB disconnect on device 00:1d.7-8 address 2
In scanner_disconnect
Unlinking img_urb
Unlinking cmd_urb
Unlinking write_urb
In scanner_delete
In scanner delete image memory, slot count 1281
freed 1281 no of blocks in scanner_delete function
Unregister status 0
usb.c: kusbd: /sbin/hotplug remove 2
=======>>>>>>>in ehci_free_config
ehci_hcd 00:1d.7: free_config 8 devnum 2
ehci_hcd 00:1d.7: free_config, async ep 0x14 qh d2335180Device is not present
Unlinking img_urb
Unable to handle kernel NULL pointer dereference at virtual address 000001d8
printing eip:
e02975bf
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<e02975bf>] Not tainted
EFLAGS: 00010206
eax: 00000100 ebx: db5e6d90 ecx: dedb6000 edx: 08048034
esi: 00000000 edi: d38ac660 ebp: d1f49eec esp: d1f49ed0
ds: 0018 es: 0018 ss: 0018
Process AAA-aplication (pid: 3268, stackpage=d1f49000)
Stack: e02adf23 08048034 00000000 de994000 d1f48000 db5e6d90 db5e6d90 d1f49f1c
e02ad1d1 db5e6d90 db5e6da4 d1f48000 00000000 c0388a00 000a1d80 00000246
00000145 d234a000 d38ac660 00000000 c014562d d38ac660 00000000 00000000
Call Trace: [<e02adf23>] [<e02ad1d1>] [<c014562d>] [<c014571b>] [<c01458d0>]
[<c0108ab3>]
Code: 8b 80 d8 00 00 00 85 c0 74 07 8b 40 1c 85 c0 75 06 b8 ed ff
Regards
Siddharth
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