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| author | Aurelien Chartier <aurelien.chartier@citrix.com> | 2013-07-09 14:29:35 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-07-29 09:32:31 -0400 |
| commit | d7ead0c3c27ef601964d1428066fac932070af7f (patch) | |
| tree | d2deecec19a8e848ea9864eebb24a8272e8434fe /drivers/xen/xenbus | |
| parent | 0b0c002c340e78173789f8afaa508070d838cf3d (diff) | |
| download | linux-stable-d7ead0c3c27ef601964d1428066fac932070af7f.tar.gz linux-stable-d7ead0c3c27ef601964d1428066fac932070af7f.tar.bz2 linux-stable-d7ead0c3c27ef601964d1428066fac932070af7f.zip | |
xenbus: frontend resume cleanup
Only create the delayed resume workqueue if we are running in the same domain
as xenstored and issue a warning if the workqueue creation fails.
Move the work initialization to the device probe so it is done only once.
Signed-off-by: Aurelien Chartier <aurelien.chartier@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen/xenbus')
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe_frontend.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c index 6ed8a9df4472..34b20bfa4e8c 100644 --- a/drivers/xen/xenbus/xenbus_probe_frontend.c +++ b/drivers/xen/xenbus/xenbus_probe_frontend.c @@ -115,7 +115,6 @@ static int xenbus_frontend_dev_resume(struct device *dev) return -EFAULT; } - INIT_WORK(&xdev->work, xenbus_frontend_delayed_resume); queue_work(xenbus_frontend_wq, &xdev->work); return 0; @@ -124,6 +123,16 @@ static int xenbus_frontend_dev_resume(struct device *dev) return xenbus_dev_resume(dev); } +static int xenbus_frontend_dev_probe(struct device *dev) +{ + if (xen_store_domain_type == XS_LOCAL) { + struct xenbus_device *xdev = to_xenbus_device(dev); + INIT_WORK(&xdev->work, xenbus_frontend_delayed_resume); + } + + return xenbus_dev_probe(dev); +} + static const struct dev_pm_ops xenbus_pm_ops = { .suspend = xenbus_dev_suspend, .resume = xenbus_frontend_dev_resume, @@ -142,7 +151,7 @@ static struct xen_bus_type xenbus_frontend = { .name = "xen", .match = xenbus_match, .uevent = xenbus_uevent_frontend, - .probe = xenbus_dev_probe, + .probe = xenbus_frontend_dev_probe, .remove = xenbus_dev_remove, .shutdown = xenbus_dev_shutdown, .dev_attrs = xenbus_dev_attrs, @@ -474,7 +483,11 @@ static int __init xenbus_probe_frontend_init(void) register_xenstore_notifier(&xenstore_notifier); - xenbus_frontend_wq = create_workqueue("xenbus_frontend"); + if (xen_store_domain_type == XS_LOCAL) { + xenbus_frontend_wq = create_workqueue("xenbus_frontend"); + if (!xenbus_frontend_wq) + pr_warn("create xenbus frontend workqueue failed, S3 resume is likely to fail\n"); + } return 0; } |