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xen: initialize platform-pci even if xen_emul_unplug=never

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When xen_emul_unplug=never is specified on kernel command line
reading files from /sys/hypervisor is broken (returns -EBUSY).
It is caused by xen_bus dependency on platform-pci and
platform-pci isn't initialized when xen_emul_unplug=never is
specified.

Fix it by allowing platform-pci to ignore xen_emul_unplug=never,
and do not intialize xen_[blk|net]front instead.

Signed-off-by: Igor Mammedov <[email protected]>
Acked-by: Stefano Stabellini <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
This commit is contained in:
Igor Mammedov 2012-03-21 15:08:38 +01:00 • committed by Konrad Rzeszutek Wilk
commit b9136d207f
3 changed files with 7 additions and 5 deletions
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3
drivers/block/xen-blkfront.c
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@ -1452,6 +1452,9 @@ static int __init xlblk_init(void)
if (!xen_domain())
return -ENODEV;
if (!xen_platform_pci_unplug)
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);