Re: [PATCH 5.15 179/484] ata: libata-scsi: Honor the D_SENSE bit for CK_COND=1 and no error

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On Thu, Aug 15, 2024 at 03:59:11PM +0200, Niklas Cassel wrote:
> On Thu, Aug 15, 2024 at 03:20:37PM +0200, Greg Kroah-Hartman wrote:
> > 5.15-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Igor Pylypiv <ipylypiv@xxxxxxxxxx>
> > 
> > commit 28ab9769117ca944cb6eb537af5599aa436287a4 upstream.
> > 
> > SAT-5 revision 8 specification removed the text about the ANSI INCITS
> > 431-2007 compliance which was requiring SCSI/ATA Translation (SAT) to
> > return descriptor format sense data for the ATA PASS-THROUGH commands
> > regardless of the setting of the D_SENSE bit.
> > 
> > Let's honor the D_SENSE bit for ATA PASS-THROUGH commands while
> > generating the "ATA PASS-THROUGH INFORMATION AVAILABLE" sense data.
> > 
> > SAT-5 revision 7
> > ================
> > 
> > 12.2.2.8 Fixed format sense data
> > 
> > Table 212 shows the fields returned in the fixed format sense data
> > (see SPC-5) for ATA PASS-THROUGH commands. SATLs compliant with ANSI
> > INCITS 431-2007, SCSI/ATA Translation (SAT) return descriptor format
> > sense data for the ATA PASS-THROUGH commands regardless of the setting
> > of the D_SENSE bit.
> > 
> > SAT-5 revision 8
> > ================
> > 
> > 12.2.2.8 Fixed format sense data
> > 
> > Table 211 shows the fields returned in the fixed format sense data
> > (see SPC-5) for ATA PASS-THROUGH commands.
> > 
> > Cc: stable@xxxxxxxxxxxxxxx # 4.19+
> > Reported-by: Niklas Cassel <cassel@xxxxxxxxxx>
> > Closes: https://lore.kernel.org/linux-ide/Zn1WUhmLglM4iais@xxxxxxxxx
> > Reviewed-by: Niklas Cassel <cassel@xxxxxxxxxx>
> > Signed-off-by: Igor Pylypiv <ipylypiv@xxxxxxxxxx>
> > Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
> > Link: https://lore.kernel.org/r/20240702024735.1152293-4-ipylypiv@xxxxxxxxxx
> > Signed-off-by: Niklas Cassel <cassel@xxxxxxxxxx>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > ---
> >  drivers/ata/libata-scsi.c |    7 ++-----
> >  1 file changed, 2 insertions(+), 5 deletions(-)
> > 
> > --- a/drivers/ata/libata-scsi.c
> > +++ b/drivers/ata/libata-scsi.c
> > @@ -872,11 +872,8 @@ static void ata_gen_passthru_sense(struc
> >  				   &sense_key, &asc, &ascq, verbose);
> >  		ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
> >  	} else {
> > -		/*
> > -		 * ATA PASS-THROUGH INFORMATION AVAILABLE
> > -		 * Always in descriptor format sense.
> > -		 */
> > -		scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
> > +		/* ATA PASS-THROUGH INFORMATION AVAILABLE */
> > +		ata_scsi_set_sense(qc->dev, cmd, RECOVERED_ERROR, 0, 0x1D);
> >  	}
> >  
> >  	if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
> > 
> > 
> 
> Hello Greg,
> 
> This commit unfortunately breaks hdparm, hddtemp and udisks,
> and I have just sent a PR to Linus that reverts this commit, see:
> https://lore.kernel.org/linux-ide/20240815124310.1349324-1-cassel@xxxxxxxxxx/T/#u
> and
> https://git.kernel.org/pub/scm/linux/kernel/git/libata/linux.git/commit/?h=ata-6.11-rc4
> 
> So it might be a good idea to not include this patch in v5.15.x in the
> first place, so that we avoid having a v5.15.x release that will be broken
> until the revert gets backported (in v5.15.x+1).

I've taken the revert now, thanks!

greg k-h




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