On Fri, Mar 29, 2013 at 08:26:41AM -0700, Gwendal Grignou wrote:
> commit 84a9a8cd9d0aa93c17e5815ab8a9cc4c0a765c63 changed the sense key
> used for returning task registers, but HDIO_DRIVE_CMD ioctl was
> not changed accordingly.
> 
> Tested: check that SMART ENABLE sent using HDIO_DRIVE_CMD returns 0
> instead of EIO.
> 
> Signed-off-by: Gwendal Grignou <gwen...@google.com>
> ---
>  drivers/ata/libata-scsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index 318b413..e05bf4c 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -532,8 +532,8 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void 
> __user *arg)
>                       struct scsi_sense_hdr sshdr;
>                       scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
>                                            &sshdr);
> -                     if (sshdr.sense_key == 0 &&
> -                         sshdr.asc == 0 && sshdr.ascq == 0)
> +                     if (sshdr.sense_key == RECOVERED_ERROR &&
> +                         sshdr.asc == 0 && sshdr.ascq == 0x1D)
>                               cmd_result &= ~SAM_STAT_CHECK_CONDITION;
>               }
>  
> -- 
> 1.8.1.3

I did not test your patch, but I think that you missed the second
test in ata_task_ioctl() and the kernel will still return -EIO
in case of HDIO_DRIVE_TASK (0x31e) ioctl.
See http://marc.info/?l=linux-kernel&m=136438868606981&w=2.
The version I've sent fixes the problem for me.

Krzysiek
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