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 <jd...@addtoit.com>
Cc: Richard Weinberger <rich...@nod.at>
Reported-by: Bart Van Assche <bart.vanass...@sandisk.com>
Signed-off-by: Dan Williams <dan.j.willi...@intel.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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