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authorThomas Gleixner <tglx@linutronix.de>2014-02-24 01:40:20 +0400
committerThomas Gleixner <tglx@linutronix.de>2014-03-04 20:37:53 +0400
commit02893afdd310fab8f41f6afbe5233c6609ec19ed (patch)
treea5e9c586e3b48b0489527483e28ac2e140d54255
parent589d03e93f6cd595f68891e48f0804f2c8f38aae (diff)
downloadlinux-02893afdd310fab8f41f6afbe5233c6609ec19ed.tar.xz
xen: Get rid of the last irq_desc abuse
Warn if any PIRQ cannot be bound to an event channel. Remove the check for irq_desc->action. This hypercall never fails in practice so we can emit a warning unconditionally. Remove a check for a valid irq desc. The only caller of xen_destroy_irq() will only do so if the irq was previously fully setup, which means the descriptor has been allocated as well. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Xen <xen-devel@lists.xenproject.org> Cc: David Vrabel <david.vrabel@citrix.com> Link: http://lkml.kernel.org/r/20140223212738.579581220@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/xen/events/events_base.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 7fea02c143ba..5dd2ddf634fb 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -487,13 +487,6 @@ static void pirq_query_unmask(int irq)
info->u.pirq.flags |= PIRQ_NEEDS_EOI;
}
-static bool probing_irq(int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
-
- return desc && desc->action == NULL;
-}
-
static void eoi_pirq(struct irq_data *data)
{
int evtchn = evtchn_from_irq(data->irq);
@@ -535,8 +528,7 @@ static unsigned int __startup_pirq(unsigned int irq)
BIND_PIRQ__WILL_SHARE : 0;
rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_pirq, &bind_pirq);
if (rc != 0) {
- if (!probing_irq(irq))
- pr_info("Failed to obtain physical IRQ %d\n", irq);
+ pr_warn("Failed to obtain physical IRQ %d\n", irq);
return 0;
}
evtchn = bind_pirq.port;
@@ -769,17 +761,12 @@ error_irq:
int xen_destroy_irq(int irq)
{
- struct irq_desc *desc;
struct physdev_unmap_pirq unmap_irq;
struct irq_info *info = info_for_irq(irq);
int rc = -ENOENT;
mutex_lock(&irq_mapping_update_lock);
- desc = irq_to_desc(irq);
- if (!desc)
- goto out;
-
if (xen_initial_domain()) {
unmap_irq.pirq = info->u.pirq.pirq;
unmap_irq.domid = info->u.pirq.domid;