linux-kernel - Re: [PATCH 6/7] isofs: stop using ioctl_by

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Date:   Fri, 24 Apr 2020 08:52:53 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jan Kara <jack@...e.cz>
Cc:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        Tim Waugh <tim@...erelk.net>, Borislav Petkov <bp@...en8.de>,
        Jan Kara <jack@...e.com>, linux-block@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] isofs: stop using ioctl_by_bdev

On Thu, Apr 23, 2020 at 01:03:47PM +0200, Jan Kara wrote:
> There's no error handling in the caller and this function actually returns
> unsigned int... So I believe you need to return 0 here to maintain previous
> behavior (however suspicious it may be)?

Indeed, and I don't think it is suspicious at all - if we have no CDROM
info we should assume session 0, which is the same as for non-CDROM
devices.  Fixed for the next version.