x86/vector: Use IRQD_CAN_RESERVE flag

Set the new CAN_RESERVE flag when the initial reservation for an interrupt
happens. The flag is used in a subsequent patch to disable reservation mode
for a certain class of MSI devices.

Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Alexandru Chirvasitu <[email protected]>
Tested-by: Andy Shevchenko <[email protected]>
Cc: Dou Liyang <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Maciej W. Rozycki <[email protected]>
Cc: Mikael Pettersson <[email protected]>
Cc: Josh Poulson <[email protected]>
Cc: Mihai Costache <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: [email protected]
Cc: Haiyang Zhang <[email protected]>
Cc: Dexuan Cui <[email protected]>
Cc: Simon Xiao <[email protected]>
Cc: Saeed Mahameed <[email protected]>
Cc: Jork Loeser <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: [email protected]
Cc: KY Srinivasan <[email protected]>
Cc: Alan Cox <[email protected]>
Cc: Sakari Ailus <[email protected]>,
Cc: [email protected]

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 750449152b04..1e969dba0476 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -184,6 +184,7 @@ static void reserve_irq_vector_locked(struct irq_data *irqd)
 	irq_matrix_reserve(vector_matrix);
 	apicd->can_reserve = true;
 	apicd->has_reserved = true;
+	irqd_set_can_reserve(irqd);
 	trace_vector_reserve(irqd->irq, 0);
 	vector_assign_managed_shutdown(irqd);
 }
@@ -478,6 +479,7 @@ static bool vector_configure_legacy(unsigned int virq, struct irq_data *irqd,
 	} else {
 		/* Release the vector */
 		apicd->can_reserve = true;
+		irqd_set_can_reserve(irqd);
 		clear_irq_vector(irqd);
 		realloc = true;
 	}