[Bug 219027] The SCSI can't adjust Max xfer length (blocks) with different storage device

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219027

--- Comment #3 from LXY (983292588@qq.com) ---
(In reply to Martin K. Petersen from comment #1)
> Due to some legacy devices hanging when probing for non-existent pages the
> Linux USB storage driver opts out of consulting the Block Limits VPD.
> 
> I suggest you create a udev rule to override
> /sys/block/sdN/queue/max_sectors_kb.

Thanks for your reply.


I've tried creating udev rules and it works. But whenever I use my USB storage
device on a new PC, I find it a little inconvenient to create rules.


So I'm trying to find a way to get Linux PC consulting the Block Limits VPD. Do
you mean that for all Linux USB storage drivers, Linux hosts will not consult
the Block Limits VPD?


I actually have the firmware source code for my USB storage device, and I can
make some changes I want. For example, change the VPD page it supports. Do you
think it will work?


Best wishes.

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