linux-kernel - Re: [PATCH v2] usb-storage: Add Brain USB3-FW to IGNORE

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Message-ID: <eb015716-7695-4567-a553-0b6960cb2026@rowland.harvard.edu>
Date: Mon, 4 Mar 2024 09:43:12 -0500
From: Alan Stern <stern@...land.harvard.edu>
To: Tom Hu <huxiaoying@...inos.cn>
Cc: linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
  linux-usb@...r.kernel.org, usb-storage@...ts.one-eyed-alien.net
Subject: Re: [PATCH v2] usb-storage: Add Brain USB3-FW to IGNORE_UAS

On Mon, Mar 04, 2024 at 11:16:56AM +0800, Tom Hu wrote:
> The UAS mode of BRAIN USB_HDD is reported to fail to work on several
> platforms with the following error message, then after re-connecting the
> device will be offlined and not working at all.
> 
> [  622.518442][ 2] sd 8:0:0:0: [sda] tag#17 uas_eh_abort_handler 0 uas-tag 18
>                    inflight: CMD
> [  622.527575][ 2] sd 8:0:0:0: [sda] tag#17 CDB: Write(10) 2a 00 03 6f 88 00 00
>                    04 00 00
> [  622.536330][ 2] sd 8:0:0:0: [sda] tag#0 uas_eh_abort_handler 0 uas-tag 1
>                    inflight: CMD
> [  622.545266][ 2] sd 8:0:0:0: [sda] tag#0 CDB: Write(10) 2a 00 07 44 1a 88 00
>                    00 08 00
> 
> These disks have a broken uas implementation, the tag field of the status
> iu-s is not set properly, so we need to fall-back to usb-storage.
> 
> ---
> v2: remove junk information from patch.

No, the junk information is still present.

> 
> Acked-by: Alan Stern <stern@...land.harvard.edu>

And I have to rescind this Acked-by.

> Signed-off-by: Hu Xiaoying <huxiaoying@...inos.cn>
> ---
>  drivers/usb/storage/unusual_uas.h | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
> index 1f8c9b16a0fb..98b7ff2c76ba 100644
> --- a/drivers/usb/storage/unusual_uas.h
> +++ b/drivers/usb/storage/unusual_uas.h
> @@ -83,6 +83,13 @@ UNUSUAL_DEV(0x0bc2, 0x331a, 0x0000, 0x9999,
>  		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
>  		US_FL_NO_REPORT_LUNS),
>  
> +/* Reported-by: Tom Hu <huxiaoying@...inos.cn> */
> +UNUSUAL_DEV(0x1234, 0x1234, 0x0000, 0x9999,

The junk information is the "0x1234, 0x1234" values.  And if you try
removing it from the patch, you'll find that the patch doesn't work.

> +		"Brain",
> +		"External HDD",
> +		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
> +		US_FL_IGNORE_UAS),

Fortunately you can get the same effect by setting a module parameter 
for usb-storage.  For example, in /etc/modprobe.d/brain.conf:

# Brain USB HDD doesn't work in UAS mode (tag field not set properly)
options usb_storage quirks=1234:1234:u

Alan Stern