linux-kernel - Re: [PATCH -mmotm] scsi: fix the wrong position of the comment

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Date:	Mon, 11 Mar 2013 19:28:35 -0400
From:	Valdis.Kletnieks@...edu
To:	Akinobu Mita <akinobu.mita@...il.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Andrew Vasquez <andrew.vasquez@...gic.com>
Subject: Re: [PATCH -mmotm] scsi: fix the wrong position of the comment

On Sun, 10 Mar 2013 17:09:50 +0900, Akinobu Mita said:
> This fixes the wrong position of the comment introduced by
> scsi-rename-random32-to-prandom_u32.patch in the -mm tree.
>
> Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
> Cc: "James E.J. Bottomley" <JBottomley@...allels.com>
> Cc: Andrew Vasquez <andrew.vasquez@...gic.com>
> ---
>  drivers/scsi/qla2xxx/qla_attr.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
> index 04bf7b8..e44d47e 100644
> --- a/drivers/scsi/qla2xxx/qla_attr.c
> +++ b/drivers/scsi/qla2xxx/qla_attr.c
> @@ -1939,13 +1939,13 @@ qla24xx_vport_delete(struct fc_vport *fc_vport)
>  	}
>
>  	/* No pending activities shall be there on the vha now */
> -	if (ql2xextended_error_logging & ql_dbg_user)
> -		msleep(prandom_u32() % 10);
> +	if (ql2xextended_error_logging & ql_dbg_user) {
>  		/*
>  		 * Just to see if something falls on the net we have placed
>  		 * below
>  		 */
> -
> +		msleep(prandom_u32() % 10);
> +	}
>  	BUG_ON(atomic_read(&vha->vref_count));

As others have noted, the msleep is potentially a crock.  However,
this particular patch is also incorrect - the *real* problem is
that the 4 line comment connected to the BUG_ON is mis-indented.

The patch *should* make it look like this:

	/* No pending activities shall be there on the vha now */
	if (ql2xextended_error_logging & ql_dbg_user)
		msleep(prandom_u32() % 10);
	/*
	 * Just to see if something falls on the net we have placed
	 * below
	 */
	BUG_ON(atomic_read(&vha->vref_count));

And a different patch should fix the msleep issue.


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