On 07/22/2011 09:41 AM, Jonathan Cameron wrote:
> This does involve additional use of the spin lock in idr.c.
> Is this an issue?
> 

Actually it looks like a bug fix. I had a TODO: to add one.

> Also, some error mangling was needed to keep the interface
> the same.  Does this matter or can we return -ENOSPC instead
> of -EBUSY?
> 

Na. -ENOSPC is just fine. All the osd Application just check for
"any error" not a specific one.

> Signed-off-by: Jonathan Cameron <ji...@cam.ac.uk>

Ack-by: Boaz Harrosh <bharr...@panasas.com>

> ---
>  drivers/scsi/osd/osd_uld.c |   22 ++++++++--------------
>  1 files changed, 8 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/scsi/osd/osd_uld.c b/drivers/scsi/osd/osd_uld.c
> index b31a8e3..fa849bd 100644
> --- a/drivers/scsi/osd/osd_uld.c
> +++ b/drivers/scsi/osd/osd_uld.c
> @@ -387,7 +387,7 @@ static void __remove(struct device *dev)
>  
>       if (oud->disk)
>               put_disk(oud->disk);
> -     ida_remove(&osd_minor_ida, oud->minor);
> +     ida_simple_remove(&osd_minor_ida, oud->minor);
>  
>       kfree(oud);
>  }
> @@ -403,18 +403,12 @@ static int osd_probe(struct device *dev)
>       if (scsi_device->type != TYPE_OSD)
>               return -ENODEV;
>  
> -     do {
> -             if (!ida_pre_get(&osd_minor_ida, GFP_KERNEL))
> -                     return -ENODEV;
> -
> -             error = ida_get_new(&osd_minor_ida, &minor);
> -     } while (error == -EAGAIN);
> -
> -     if (error)
> -             return error;
> -     if (minor >= SCSI_OSD_MAX_MINOR) {
> -             error = -EBUSY;
> -             goto err_retract_minor;
> +     minor = ida_simple_get(&osd_minor_ida, 0,
> +                            SCSI_OSD_MAX_MINOR, GFP_KERNEL);
> +     if (minor < 0) {
> +             if (minor == -ENOSPC)
> +                     return -EBUSY;

Just drop the translation is fine as well

> +             return minor;
>       }
>  
>       error = -ENOMEM;
> @@ -491,7 +485,7 @@ err_free_osd:
>       dev_set_drvdata(dev, NULL);
>       kfree(oud);
>  err_retract_minor:
> -     ida_remove(&osd_minor_ida, minor);
> +     ida_simple_remove(&osd_minor_ida, minor);
>       return error;
>  }
>  

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