[PATCH] x86/ioapic: do not use assignment in if condition

[sunran001]

Fixes the following checkpatch errors:

ERROR: do not use assignment in if condition

Signed-off-by: Ran Sun <sunran001@xxxxxxxxxx>
---
 arch/x86/kernel/apic/io_apic.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c 
b/arch/x86/kernel/apic/io_apic.c
index 4241dc243aa8..be32b085d37e 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1058,8 +1058,11 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, 
int ioapic, int pin,
 		if (legacy)
 			irq = alloc_isa_irq_from_domain(domain, irq,
 							ioapic, pin, &tmp);
-		else if ((irq = irq_find_mapping(domain, pin)) == 0)
-			irq = alloc_irq_from_domain(domain, ioapic, gsi, &tmp);
+		else {
+			irq = irq_find_mapping(domain, pin);
+			if (irq == 0)
+				irq = alloc_irq_from_domain(domain, ioapic, gsi, &tmp);
+		}
 		else if (!mp_check_pin_attr(irq, &tmp))
 			irq = -EBUSY;
 		if (irq >= 0) {