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xen/blkfront: reorder tests in xlblk_init()

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In case we don't want pv block devices we should not test parameters
for sanity and eventually print out error messages. So test precluding
conditions before checking parameters.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Juergen Gross 2018-08-13 16:01:12 +02:00 committed by Konrad Rzeszutek Wilk
parent a46b53672b
commit 4bcddbae01
1 changed files with 9 additions and 9 deletions
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18
drivers/block/xen-blkfront.c
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@ -2708,6 +2708,15 @@ static int __init xlblk_init(void)
if (!xen_domain())
return -ENODEV;
if (!xen_has_pv_disk_devices())
return -ENODEV;
if (register_blkdev(XENVBD_MAJOR, DEV_NAME)) {
pr_warn("xen_blk: can't get major %d with name %s\n",
XENVBD_MAJOR, DEV_NAME);
return -ENODEV;
}
if (xen_blkif_max_segments < BLKIF_MAX_SEGMENTS_PER_REQUEST)
xen_blkif_max_segments = BLKIF_MAX_SEGMENTS_PER_REQUEST;
@ -2723,15 +2732,6 @@ static int __init xlblk_init(void)
xen_blkif_max_queues = nr_cpus;
}
if (!xen_has_pv_disk_devices())
return -ENODEV;
if (register_blkdev(XENVBD_MAJOR, DEV_NAME)) {
printk(KERN_WARNING "xen_blk: can't get major %d with name %s\n",
XENVBD_MAJOR, DEV_NAME);
return -ENODEV;
}
INIT_DELAYED_WORK(&blkfront_work, blkfront_delay_work);
ret = xenbus_register_frontend(&blkfront_driver);