Matthew Stapleton wrote:
> Tejun Heo wrote:
>> Please apply the attached patch over 2.6.19 and report what the kernel says.
>>
>> Thanks.
>>
> 
> I got the following errors during the timeout when running hald:
> 
> ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> ata1.01: cmd a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x1e data 0 in
>          res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
> ata1.01: CDB: 1e:00:00:00:00:00:00:00 00:00:00:00:00:00:00:00 p=6
> 
> ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> ata1.01: (BMDMA stat 0x64)
> ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x25 data 8 in
>          res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
> ata1.01: CDB: 25:00:00:00:00:00:00:00 00:00:00:00:00:00:00:00 p=7
> 
> With my test program that opens and closes the cdrom drive every second, I got 
> the following errors during the timeout:
> 
> ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> ata1.01: (BMDMA stat 0x64)
> ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x43 data 12 in
>          res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
> ata1.01: CDB: 43:00:00:00:00:00:00:00 0c:40:00:00:00:00:00:00 p=7
> 
> ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> ata1.01: (BMDMA stat 0x4)
> ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x25 data 8 in
>          res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
> ata1.01: CDB: 25:00:00:00:00:00:00:00 00:00:00:00:00:00:00:00 p=7

Can you try the attached patch over 2.6.19 and report full dmesg?  Thanks.

-- 
tejun