linux-kernel - Re: [PATCH] ata: libata-core: Disable READ LOG DMA EXT for Samsung MZ7LH

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Date:   Tue, 14 Feb 2023 10:33:23 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Patrick McLean <chutzpah@...too.org>
Cc:     linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH] ata: libata-core: Disable READ LOG DMA EXT for Samsung
 MZ7LH

On 2/14/23 05:17, Patrick McLean wrote:
> On Sat, 11 Feb 2023 12:11:48 +0900
> Damien Le Moal <damien.lemoal@...nsource.wdc.com> wrote:
> 
>> On 2/11/23 06:51, Patrick McLean wrote:
>>> Samsung MZ7LH drives are spewing messages like this in to dmesg with AMD
>>> SATA controllers:
>>>
>>> ata1.00: exception Emask 0x0 SAct 0x7e0000 SErr 0x0 action 0x6 frozen
>>> ata1.00: failed command: SEND FPDMA QUEUED
>>> ata1.00: cmd 64/01:88:00:00:00/00:00:00:00:00/a0 tag 17 ncq dma 512 out
>>>          res 40/00:01:01:4f:c2/00:00:00:00:00/00 Emask
>>>          0x4 (timeout)
>>>
>>> Since this was seen previously with SSD 840 EVO drives in
>>> https://bugzilla.kernel.org/show_bug.cgi?id=203475 let's add the same
>>> fix for these drives as the EVOs have, since they likely have very
>>> similar firmwares.
>>>
>>> Signed-off-by: Patrick McLean <chutzpah@...too.org>
>>> ---
>>>  drivers/ata/libata-core.c | 3 +++
>>>  1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
>>> index 2ea572628b1c..c4c89d24f84c 100644
>>> --- a/drivers/ata/libata-core.c
>>> +++ b/drivers/ata/libata-core.c
>>> @@ -4045,6 +4045,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
>>>  	{ "Samsung SSD 870*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM |
>>>  						ATA_HORKAGE_ZERO_AFTER_TRIM |
>>>  						ATA_HORKAGE_NO_NCQ_ON_ATI },
>>> +	{ "SAMSUNG*MZ7LH*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM |
>>> +						ATA_HORKAGE_ZERO_AFTER_TRIM |
>>> +						ATA_HORKAGE_NO_NCQ_ON_ATI, },
>>>  	{ "FCCT*M500*",			NULL,	ATA_HORKAGE_NO_NCQ_TRIM |
>>>  						ATA_HORKAGE_ZERO_AFTER_TRIM },
>>>    
>>
>> Looks OK, but ATA_HORKAGE_NO_NCQ_ON_ATI is for PCI vendor ID 1002h. AMD
>> also has vendor ID 1022h. Did you check you adapter vendor ID & tested
>> this patch ?
> 
> We tested this patch, and it resolves the problem for us (we have been
> using it for several months).

OK. Thanks for confirming. Will apply in a little while. Thanks !

> 
>> -- 
>> Damien Le Moal
>> Western Digital Research
>>
> 
> 

-- 
Damien Le Moal
Western Digital Research