4.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
commit 839b0f1c4ef674cd929a42304c078afca278581a upstream.
To address the EBUSY fail of interrupt affinity settings in case that the
previous setting has not been cleaned up yet, use the new apic_ack_irq()
function instead of the special uv_ack_apic() implementation which is
merily a wrapper around ack_APIC_irq().
Preparatory change for the real fix
Fixes: dccfe3147b42 ("x86/vector: Simplify vector move cleanup")
Reported-by: Song Liu <liu.song.a23@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Tested-by: Song Liu <songliubraving@xxxxxx>
Cc: Joerg Roedel <jroedel@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Dmitry Safonov <0x7f454c46@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Mike Travis <mike.travis@xxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Tariq Toukan <tariqt@xxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20180604162224.721691398@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/platform/uv/uv_irq.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/arch/x86/platform/uv/uv_irq.c
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -47,11 +47,6 @@ static void uv_program_mmr(struct irq_cf
static void uv_noop(struct irq_data *data) { }
-static void uv_ack_apic(struct irq_data *data)
-{
- ack_APIC_irq();
-}
-
static int
uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
@@ -73,7 +68,7 @@ static struct irq_chip uv_irq_chip = {
.name = "UV-CORE",
.irq_mask = uv_noop,
.irq_unmask = uv_noop,
- .irq_eoi = uv_ack_apic,
+ .irq_eoi = apic_ack_irq,
.irq_set_affinity = uv_set_irq_affinity,
};
