linux-kernel - Re: [PATCH V4 10/12] block: call __bio_free in bio

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Message-ID: <20170629202251.GA416@lst.de>
Date:   Thu, 29 Jun 2017 22:22:51 +0200
From:   Christoph Hellwig <hch@....de>
To:     Shaohua Li <shli@...nel.org>
Cc:     Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, tj@...nel.org,
        gregkh@...uxfoundation.org, axboe@...com, rostedt@...dmis.org,
        lizefan@...wei.com, Kernel-team@...com, Shaohua Li <shli@...com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH V4 10/12] block: call __bio_free in bio_endio

On Thu, Jun 29, 2017 at 11:35:44AM -0700, Shaohua Li wrote:
> > -
> >  	/* Auto-generate integrity metadata if this is a write */
> >  	if (bio_data_dir(bio) == WRITE)
> >  		bio_integrity_process(bio, bi->profile->generate_fn);
> > @@ -370,14 +364,12 @@ static void bio_integrity_verify_fn(struct work_struct *work)
> >  	struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
> >  
> >  	bio->bi_status = bio_integrity_process(bio, bi->profile->verify_fn);
> > -
> > -	/* Restore original bio completion handler */
> > -	bio->bi_end_io = bip->bip_end_io;
> > +	bio_integrity_free(bio);
> >  	bio_endio(bio);
> 
> should we directly call bi_end_io here? Otherwise, looks reasonable to me.

We should call bio_endio to get the proper chaining behavior.