X5 X5/PI USB serial converter 사용중 에러입니다.

X5에 PI 보드의 USB Host에 8대의 serial converter를 사용하여 통신를 하다가
다음과 같은 현상이 발생하였읍니다.

시리얼 쪽의 buffer가 작은지 write /read 인터벌을 좀 길게하면 발생은 덜하지만
그래도 간간히 발생하네요..

문제가 뭔지 봐주시기 바랍니다. X5에서 발생하고 S2410에서 발생하는지는 아직 시험을
못했읍니다.

아래는 dmesg와  중간에 커널 패닉 현상의 로그를 받은것입니다.

한번 봐주시기 바랍니다.


[root@ez-x5 /root]$ dmesg
8) with no serial options enabled
ttyS00 at 0x0000 (irq = 15) is a PXA UART
ttyS01 at 0x0000 (irq = 14) is a PXA UART
ttyS02 at 0x0000 (irq = 13) is a PXA UART
mk712 device OK!
I2C: DS1307 RTC driver successfully loaded
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
hda: no response (status = 0xa1), resetting drive
hda: no response (status = 0xa1)
hdb: no response (status = 0xa1), resetting drive
hdb: no response (status = 0xa1)
eth0: cs8900 rev K Base 0xF1000300<6>, IRQ 44, MAC 00:A2:55:7D:AC:D7
RAMDISK driver initialized: 16 RAM disks of 12288K size 1024 blocksize
loop: loaded (max 8 devices)
SCSI subsystem driver Revision: 1.00
ac97_codec: AC97 Audio codec, id: 0x4352:0x5973 (Cirrus Logic CS4202)
NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MB 3,3V)
Creating 3 MTD partitions on "NAND 64MB 3,3V":
0x00000000-0x00100000 : "EZ-X5 Kernel partition"
0x00100000-0x00600000 : "EZ-X5 Ramdisk partition"
0x00600000-0x04000000 : "EZ-X5 Data partition 0"
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb.c: new USB bus registered, assigned bus number 1
host/hc_sl811.c: USB SL811 at f2000000, addr2 = f2000004, IRQ 35
hub.c: USB hub found
hub.c: 1 port detected
usb.c: registered new driver hid
hid-core.c: v1.8.1 Andreas Gal, Vojtech Pavlik <vojtech@suse.cz>
hid-core.c: USB HID support drivers
usb.c: registered new driver serial
usbserial.c: USB Serial support registered for Generic
usbserial.c: USB Serial Driver core v1.4
usbserial.c: USB Serial support registered for FTDI SIO
usbserial.c: USB Serial support registered for FTDI 8U232AM Compatible
usbserial.c: USB Serial support registered for FTDI FT232BM Compatible
ftdi_sio.c: v1.3.2:USB FTDI Serial Converters Driver
usbserial.c: USB Serial support registered for PL-2303
pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.9
Initializing USB Mass Storage driver...
usb.c: registered new driver usb-storage
USB Mass Storage support registered.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 8192)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com
RAMDISK: Compressed image found at block 0
Freeing initrd memory: 5120K
VFS: Mounted root (ext2 filesystem) readonly.
Freeing init memory: 72K
yaffs: dev is 7938 name is "1f:02"
yaffs: Attempting MTD mount on 31.2, "1f:02"
block 2044 is bad
hub.c: new USB device sl811-1, assigned address 2
hub.c: USB hub found
hub.c: 4 ports detected
hub.c: new USB device sl811-1.1, assigned address 3
hub.c: USB hub found
hub.c: 4 ports detected
hub.c: new USB device sl811-1.3, assigned address 4
hub.c: USB hub found
hub.c: 4 ports detected
hub.c: new USB device sl811-1.1.1, assigned address 5
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
hub.c: new USB device sl811-1.1.2, assigned address 6
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB1 (or usb/tts/1 for devfs)
hub.c: new USB device sl811-1.1.3, assigned address 7
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB2 (or usb/tts/2 for devfs)
hub.c: new USB device sl811-1.1.4, assigned address 8
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB3 (or usb/tts/3 for devfs)
hub.c: new USB device sl811-1.3.1, assigned address 9
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB4 (or usb/tts/4 for devfs)
hub.c: new USB device sl811-1.3.2, assigned address 10
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB5 (or usb/tts/5 for devfs)
hub.c: new USB device sl811-1.3.3, assigned address 11
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB6 (or usb/tts/6 for devfs)
hub.c: new USB device sl811-1.3.4, assigned address 12
usbserial.c: FTDI 8U232AM Compatible converter detected
usbserial.c: FTDI 8U232AM Compatible converter now attached to ttyUSB7 (or usb/tts/7 for devfs)
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 761] dev:10,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 669] dev: 3,ep: 1-I,type:INTR,flags:   0,len:0/1,stat:-115(ffffff8d)
host/hc_simple.h: data(0/1): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 6d1] dev: 2,ep: 1-I,type:INTR,flags:   0,len:0/1,stat:-115(ffffff8d)
host/hc_simple.h: data(0/1): stat:-115
IRQ occurred while service SOF: irq = 0x1
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 757] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 7c1] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 765] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 21c] dev:11,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 5f4] dev: 8,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 73f] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 7b3] dev:12,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 168] dev: 8,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 227] dev: 9,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[  6a] dev:11,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 329] dev: 7,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 16c] dev: 8,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 542] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 143] dev:10,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 2fd] dev: 4,ep: 1-I,type:INTR,flags:   0,len:0/1,stat:-115(ffffff8d)
host/hc_simple.h: data(0/1): stat:-115
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 421] dev: 5,ep: 1-I,type:BULK,flags:   0,len:0/64,stat:-115(ffffff8d)
host/hc_simple.h: data(0/64): stat:-115
[root@ez-x5 /root]$    error on received packet: urb->status = 0xffffffe0
SOF interrupt: td_array->len = 0x1, s/b: 0
INTERRUPT URB:[ 6bc] dev: 2,ep: 1-I,type:INTR,flags:   0,len:0/1,stat:-115(ffffff8d)
host/hc_simple.h: data(0/1): stat:-115
done_list: excessive error: errcount = 0x4, cc = 0x91
error on received packet: urb->status = 0xffffffe0
Unable to handle kernel NULL pointer dereference at virtual address 00000000
mm = c01b0920 pgd = c0004000
*pgd = 00000000, *pmd = 00000000
Internal error: Oops: 0
CPU: 0
pc : [<c0110d00>]    lr : [<00000000>]    Not tainted
sp : c01afe48  ip : 00000005  fp : 00000000
r10: 000000e1  r9 : 00000000  r8 : 00000000
r7 : 00000000  r6 : c02cbc00  r5 : 00000006  r4 : 000001a8
r3 : 00050000  r2 : f2000004  r1 : 00000010  r0 : c02cbf80
Flags: nzcv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
Control: 397F  Table: A3494000  DAC: 0000001D
Process swapper (pid: 0, stack limit = 0xc01ae368)
Stack: (0xc01afe48 to 0xc01b0000)
fe40:                   c01110dc 0000d66a 0000d66a c01b1220 c01b1220 c0a4d420
fe60: c0010c00 c0b71a00 c02cbc00 00000008 000000e1 00000000 c010feb8 00000008
fe80: 00000000 00000002 0000000c 000000e1 00000000 00000000 00000000 00000000
fea0: 000000e1 00000000 0000000c 00000002 00000006 c0a4d420 c02cbc38 c02cbc00
fec0: 00000001 00000000 ffffffff a0014e54 00000000 c010fc20 c02cbc00 c02cbc38
fee0: 00000000 c010fd1c 00000090 c02cbc00 00000000 00000090 c0111584 00000000
ff00: c02fc680 00000000 c01aff94 00000023 c01aff94 c001cf74 c01c3764 c02fc680
ff20: 00000023 c01c2e18 c001d050 0000000d 00001000 c01aff94 8e000000 c01c5268
ff40: c0024450 c01b0ee4 20000000 c01aff94 00000003 c01aff94 c001cf74 c01c2ee4
ff60: c01b0ee4 00000003 c01c2e18 c001d050 c01aff94 c01cc220 00000400 c001d760
ff80: 68000013 c001d1bc c01affc8 f8d00000 c001c2a0 00000001 00000000 00000000
ffa0: 68000013 c001d720 80000000 c01e72e8 c01c49e8 c01b0bb4 69052d06 a0014e54
ffc0: 00000000 28000013 c01affdc c001d768 c001d760 68000013 ffffffff c001d7c4
ffe0: 00000000 c01cda84 c00086c0 c01c4e04 c01f21d8 c01f21d8 c01c49f4 c0008080
Backtrace: no frame pointer
Code: e3730801 e1a0c823 049df004 e5902014 (e4de3001)
Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing

.. 컥..!