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Groups > linux.kernel > #1683349
| From | Chris Clayton <chris2553@googlemail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] scsi: sg: fix SG_DXFER_FROM_DEV transfers |
| Date | 2017-07-07 20:10 +0200 |
| Message-ID | <u0FRv-7CG-11@gated-at.bofh.it> (permalink) |
| References | <u0xhg-1wr-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 07/07/17 09:56, Johannes Thumshirn wrote:
> SG_DXFER_FROM_DEV transfers do not necessarily have a dxferp as we set
> it to NULL for the old sg_io read/write interface, but must have a length
> bigger than 0. This fixes a regression introduced by commit 28676d869bbb
> ("scsi: sg: check for valid direction before starting the request")
>
I've tested this new patch and the Nero applications can still find the optical drives on my laptop.
Tested-by: Chris Clayton <chris2553@googlemail.com>
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
> Fixes: 28676d869bbb ("scsi: sg: check for valid direction before starting the request")
> Reported-by: Chris Clayton <chris2553@googlemail.com>
> Tested-by: Chris Clayton <chris2553@googlemail.com>
> Cc: Douglas Gilbert <dgilbert@interlog.com>
> Reviewed-by: Hannes Reinecke <hare@suse.com>
> ---
> Changes to v1:
> * Fix breakage of the sg_io v3 interface, verified using sg_inq
>
> drivers/scsi/sg.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
> index 21225d62b0c1..1e82d4128a84 100644
> --- a/drivers/scsi/sg.c
> +++ b/drivers/scsi/sg.c
> @@ -758,8 +758,11 @@ static bool sg_is_valid_dxfer(sg_io_hdr_t *hp)
> if (hp->dxferp || hp->dxfer_len > 0)
> return false;
> return true;
> - case SG_DXFER_TO_DEV:
> case SG_DXFER_FROM_DEV:
> + if (hp->dxfer_len < 0)
> + return false;
> + return true;
> + case SG_DXFER_TO_DEV:
> case SG_DXFER_TO_FROM_DEV:
> if (!hp->dxferp || hp->dxfer_len == 0)
> return false;
>
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[PATCH v2] scsi: sg: fix SG_DXFER_FROM_DEV transfers Johannes Thumshirn <jthumshirn@suse.de> - 2017-07-07 11:00 +0200 Re: [PATCH v2] scsi: sg: fix SG_DXFER_FROM_DEV transfers Chris Clayton <chris2553@googlemail.com> - 2017-07-07 20:10 +0200 Re: [PATCH v2] scsi: sg: fix SG_DXFER_FROM_DEV transfers Douglas Gilbert <dgilbert@interlog.com> - 2017-07-11 21:10 +0200 Re: [PATCH v2] scsi: sg: fix SG_DXFER_FROM_DEV transfers "Martin K. Petersen" <martin.petersen@oracle.com> - 2017-07-12 23:20 +0200
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