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Message-ID: <a5024a02-adfb-c027-7a40-417cc10911af@sandisk.com>
Date: Wed, 22 Jun 2016 08:20:04 +0200
From: Bart Van Assche <bart.vanassche@...disk.com>
To: Dan Williams <dan.j.williams@...el.com>,
"axboe@...com" <axboe@...com>
CC: "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
"Richard Weinberger" <richard@....at>,
Jeff Dike <jdike@...toit.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
"hch@....de" <hch@....de>
Subject: Re: [PATCH v4 3/5] um: track 'parent' device in a local variable
On 06/21/2016 10:47 PM, Dan Williams wrote:
> In preparation for the removal of 'driverfs_dev' from 'struct gendisk'
> use a local variable to track the parented vs un-parented case in
> ubd_disk_register().
>
> Cc: Jeff Dike <jdike@...toit.com>
> Cc: Richard Weinberger <richard@....at>
> Reported-by: Bart Van Assche <bart.vanassche@...disk.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---
> arch/um/drivers/ubd_kern.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
> index ef6b4d960bad..8ec7b4112f55 100644
> --- a/arch/um/drivers/ubd_kern.c
> +++ b/arch/um/drivers/ubd_kern.c
> @@ -801,6 +801,7 @@ static void ubd_device_release(struct device *dev)
> static int ubd_disk_register(int major, u64 size, int unit,
> struct gendisk **disk_out)
> {
> + struct device *dev = NULL;
> struct gendisk *disk;
>
> disk = alloc_disk(1 << UBD_SHIFT);
> @@ -823,12 +824,12 @@ static int ubd_disk_register(int major, u64 size, int unit,
> ubd_devs[unit].pdev.dev.release = ubd_device_release;
> dev_set_drvdata(&ubd_devs[unit].pdev.dev, &ubd_devs[unit]);
> platform_device_register(&ubd_devs[unit].pdev);
> - disk->driverfs_dev = &ubd_devs[unit].pdev.dev;
> + dev = &ubd_devs[unit].pdev.dev;
> }
>
> disk->private_data = &ubd_devs[unit];
> disk->queue = ubd_devs[unit].queue;
> - add_disk(disk);
> + device_add_disk(dev, disk);
>
> *disk_out = disk;
> return 0;
Hello Dan,
The Reported-by tag is intended to give people credit who find bugs in
the upstream kernel. What I reported was a bug not in the upstream
kernel but in a previous version of this patch series so I think the
"Reported-by" tag can be left out from this patch.
Additionally, please consider to use a more descriptive name instead of
"dev", e.g. "parent".
Thanks,
Bart.
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