Re: [PATCH] uas: replace WARN_ON_ONCE() with assert_spin_locked().

From: Hans de Goede
Date: Mon Aug 11 2014 - 14:56:24 EST


Hi,

On 08/11/2014 09:59 AM, Sanjeev Sharma wrote:
> spin_is_locked() always return false in uniprocessor configuration and therefore it
> would be advise to repalce with assert_spin_locked().
>
> Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@xxxxxxxxxx>

Looks sane / good to me:

Acked-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Regards,

Hans



> ---
> drivers/usb/storage/uas.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
> index 3f42785..8e5877d 100644
> --- a/drivers/usb/storage/uas.c
> +++ b/drivers/usb/storage/uas.c
> @@ -154,7 +154,7 @@ static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
> struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
>
> uas_log_cmd_state(cmnd, caller);
> - WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> + assert_spin_locked(&devinfo->lock);
> WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
> cmdinfo->state |= COMMAND_ABORTED;
> cmdinfo->state &= ~IS_IN_WORK_LIST;
> @@ -181,7 +181,7 @@ static void uas_add_work(struct uas_cmd_info *cmdinfo)
> struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
> struct uas_dev_info *devinfo = cmnd->device->hostdata;
>
> - WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> + assert_spin_locked(&devinfo->lock);
> cmdinfo->state |= IS_IN_WORK_LIST;
> schedule_work(&devinfo->work);
> }
> @@ -283,7 +283,7 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
> struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
> struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
>
> - WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> + assert_spin_locked(&devinfo->lock);
> if (cmdinfo->state & (COMMAND_INFLIGHT |
> DATA_IN_URB_INFLIGHT |
> DATA_OUT_URB_INFLIGHT |
> @@ -622,7 +622,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
> struct urb *urb;
> int err;
>
> - WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
> + assert_spin_locked(&devinfo->lock);
> if (cmdinfo->state & SUBMIT_STATUS_URB) {
> urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
> if (!urb)
>
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