Commit-ID: 11277aabcbbe13916151af897d29a5e9f71ca73f
Gitweb: http://git.kernel.org/tip/11277aabcbbe13916151af897d29a5e9f71ca73f
Author: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
AuthorDate: Thu, 23 Feb 2017 17:16:41 +0800
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 1 Mar 2017 10:09:09 +0100
x86/apic: Simplify enable_IR_x2apic(), remove try_to_enable_IR()
The following commit:
2e63ad4bd5dd ("x86/apic: Do not init irq remapping if ioapic is disabled")
... added a check for skipped IO-APIC setup to enable_IR_x2apic(), but this
check is also duplicated in try_to_enable_IR() - and it will never succeed in
calling irq_remapping_enable().
Remove the whole irq_remapping_enable() complication: if the IO-APIC is
disabled we cannot enable IRQ remapping.
Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: bp@xxxxxxxxx
Cc: nicstange@xxxxxxxxx
Cc: wanpeng.li@xxxxxxxxxxx
Link: http://lkml.kernel.org/r/1487841401-1543-1-git-send-email-douly.fnst@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/apic/apic.c | 17 ++++-------------
1 file changed, 4 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 11088b8..aee7ded 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1610,24 +1610,15 @@ static inline void try_to_enable_x2apic(int remap_mode) { }
static inline void __x2apic_enable(void) { }
#endif /* !CONFIG_X86_X2APIC */
-static int __init try_to_enable_IR(void)
-{
-#ifdef CONFIG_X86_IO_APIC
- if (!x2apic_enabled() && skip_ioapic_setup) {
- pr_info("Not enabling interrupt remapping due to skipped IO-APIC setup\n");
- return -1;
- }
-#endif
- return irq_remapping_enable();
-}
-
void __init enable_IR_x2apic(void)
{
unsigned long flags;
int ret, ir_stat;
- if (skip_ioapic_setup)
+ if (skip_ioapic_setup) {
+ pr_info("Not enabling interrupt remapping due to skipped IO-APIC setup\n");
return;
+ }
ir_stat = irq_remapping_prepare();
if (ir_stat < 0 && !x2apic_supported())
@@ -1645,7 +1636,7 @@ void __init enable_IR_x2apic(void)
/* If irq_remapping_prepare() succeeded, try to enable it */
if (ir_stat >= 0)
- ir_stat = try_to_enable_IR();
+ ir_stat = irq_remapping_enable();
/* ir_stat contains the remap mode or an error code */
try_to_enable_x2apic(ir_stat);
--
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