linux-kernel - Re: macbook pro dvd playback after suspend Buffer I/O error

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Date:	Thu, 12 Jun 2008 06:15:56 +0000
From:	"Justin Mattock" <justinmattock@...il.com>
To:	"Tejun Heo" <htejun@...il.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: macbook pro dvd playback after suspend Buffer I/O error

On Thu, Jun 12, 2008 at 5:22 AM, Justin Mattock <justinmattock@...il.com> wrote:
> On Thu, Jun 12, 2008 at 4:15 AM, Tejun Heo <htejun@...il.com> wrote:
>> Hello,
>>
>> Please do the followings.
>>
>> 1. apply the attached patch
>> 2. turn on device drivers -> SCSI -> SCSI verbose logging
>> 3. rebuild the kernel and boot the new kernel.
>> 4. run "sysctl -w dev.scsi.logging_level=1"
>> 5. run the suspend/resume test w/ dd and report the result.
>>
>> Thanks.
>>
>> --
>> tejun
>>
>> ---
>>  drivers/ata/libata-eh.c |    6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> Index: work/drivers/ata/libata-eh.c
>> ===================================================================
>> --- work.orig/drivers/ata/libata-eh.c
>> +++ work/drivers/ata/libata-eh.c
>> @@ -2507,6 +2507,9 @@ static int atapi_eh_clear_ua(struct ata_
>>                        return -EIO;
>>                }
>>
>> +               ata_dev_printk(dev, KERN_WARNING, "XXX: TUR err_mask=0x%x sense_key=0x%x\n",
>> +                              err_mask, sense_key);
>> +
>>                if (!err_mask || sense_key != UNIT_ATTENTION)
>>                        return 0;
>>
>> @@ -2516,6 +2519,9 @@ static int atapi_eh_clear_ua(struct ata_
>>                                "UNIT ATTENTION (err_mask=0x%x)\n", err_mask);
>>                        return -EIO;
>>                }
>> +
>> +               ata_dev_printk(dev, KERN_WARNING, "XXX: REQUEST SENSE err_mask=0x%x ASC=0x%x ASCQ=0x%x\n",
>> +                              err_mask, sense_buffer[12], sense_buffer[13]);
>>        }
>>
>>        ata_dev_printk(dev, KERN_WARNING,
>>
>>
>
> Alright; I'll let you know what happens.
> regards;
>
> --
> Justin P. Mattock
>


O.K. applied the patch and did what you have described,(except for
sysctl -w / ended up inserting dev.scsi.logging_level=1 in
/etc/sysctl.conf)
This is what dd reported:(same as before)
dd: reading `/dev/sr0':Input/output error
41+1 records in
41+1 records out
43122688 bytes (43 MB) copied, 41.0967 seconds, 1.0 MB/s

Attached is dmesg of using dd on the first suspend, and playing a dvd
on the second.
regards;

-- 
Justin P. Mattock

Download attachment "dmesg" of type "application/octet-stream" (65119 bytes)