OUr system crashes lots - we think it's due to a failure of a Perle Rio hardware configuration. But is it hardware or software?

Here's a dump of our oops file. Can anyone tell me if this is a driver or a hardware issue? Any input would be appreciated! Thanks!!!

EFLAGS: 00010246
eax: 00000000 ebx: f5ce9002 ecx: 00000006 edx: 00000000
esi: 00000000 edi: 00000000 ebp: f54aa200 esp: f5abbe9c
ds: 0018 es: 0018 ss: 18
Process agetty (pid: 1016, stackpage=f5abb000)
Stack: f5abbeb4 f54aa200 f89f251f f54aa200 7fffffff 00000246 f8a31e42 f54aa200
00001000 00000002 f54aa200 f09f67bc f54aa200 00000000 f89f12ed f54aa200
0004aa1c 00000002 00000001 00000002 00000002 0004aa1c f55f0000 f5abe000
Call Trace: [<f89f251f>] gs_set_termies_Rsmp_4fbe7bd1 [generic_serial] 0x11d (0xf5abbea4))
[<f89f67bc>] rio_enable_tx_interrupts [rio] 0x1c (0xf5abbec8))
[<f89f12ed>] gs_write_Rsmp_0f4d7b05 [generic_serial] ox1ad (0xf5abbed4))
[<c018f6e6>] write_chan [kernel] 0x1f6 (0xf5abbefc))
[<c01849fd>] do_tty_write [kernel] 0x1f6 (0xf5abbf48))
[<c018aeed>] tty_write [kernel] 0xfd (0xf5abbf74))
[<c018f4f0>] write_chan [kernel] 0x0 (0xf5abbf78))
[<c014a573>] sys_write [kernel] 0xa3 (0xf5abbfa8))
[<c012f1a9>] sys_newuname [kernel] 0x39 (0xf5abbfa8))
[<c010947f>] system_call [kernel] 0x33 (0xf5abbfc0))
Code: f6 00 14 01 00 00 20 74 8a 8b 90 fc 00 00 00 85 d2 75 4a f6
Using defaults from ksymoops -t elf32-i386 -a i386


>>ebx; f5ce9002 <_end+3589df82/383c1fe0>
>>ebp; f54aa200 <_end+3505f180/383c1fe0>
>>esp; f5abbe9c <_end+35670e1c/383c1fe0>

Trace; f89f251f <[generic_serial]gs_set_termios+1bf/360>
Trace; f89f67bc <[rio]rio_enable_tx_interrupts+1c/60>
Trace; f89f12ed <[generic_serial]gs_write+1ad/250>
Trace; c018f6e6 <write_chan+1f6/220>
Trace; c01849fd <newque+9d/f0>
Trace; c018aeed <tty_write+fd/130>
Trace; c018f4f0 <write_chan+0/220>
Trace; c014a573 <sys_write+a3/160>
Trace; c012f1a9 <sys_newuname+39/70>
Trace; c010947f <system_call+33/38>

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: f6 00 14 testb $0x14,(%eax)
Code; 00000003 Before first symbol
3: 01 00 add %eax,(%eax)
Code; 00000005 Before first symbol
5: 00 20 add %ah,(%eax)
Code; 00000007 Before first symbol
7: 74 8a je ffffff93 <_EIP+0xffffff93>
Code; 00000009 Before first symbol
9: 8b 90 fc 00 00 00 mov 0xfc(%eax),%edx
Code; 0000000f Before first symbol
f: 85 d2 test %edx,%edx
Code; 00000011 Before first symbol
11: 75 4a jne 5d <_EIP+0x5d>
Code; 00000013 Before first symbol
13: f6 00 00 testb $0x0,(%eax)