Commit-ID: 02893afdd310fab8f41f6afbe5233c6609ec19ed
Gitweb: http://git.kernel.org/tip/02893afdd310fab8f41f6afbe5233c6609ec19ed
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sun, 23 Feb 2014 21:40:20 +0000
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 4 Mar 2014 17:37:53 +0100
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@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Xen <xen-devel@xxxxxxxxxxxxxxxxxxxx>
Cc: David Vrabel <david.vrabel@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20140223212738.579581220@xxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
drivers/xen/events/events_base.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 7fea02c..5dd2ddf 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;
--
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