Re: [PATCH] scsi: ufs: should not override buffer lengh

[Can Guo]

On 2021-01-11 16:15, Avri Altman wrote:
> > Sorry, typo corrected.
> >
> > Hi Jaegeuk,
> >
> > I think the problem is that func ufshcd_read_desc_param() is not
> > expecting
> > one access unsupported descriptors on RPMB LU.
> Correct.
> This is about wb introducing a new constraint: wb buffer is only
> allowed in lu 0..7.
> And this is why, IMHO, the fix should be in ufs_is_valid_unit_desc_lun,
> To include param offset, as it is only called in contingency of
> ufshcd_read_desc_param.
>
> Thanks,
> Avri

Yeah... Fixing it in ufs-sysfs.c also works. Anyways, the math in
ufshcd_read_desc_param is already complex. Let's fix it somewhere
close to the source/initiator.

Thanks,
Can Guo.