Signed-off-by: Andrea Bastoni <[email protected]>
[Jan: fix APIC register loop after making n unsigned]
Signed-off-by: Jan Kiszka <[email protected]>
---
hypervisor/arch/x86/apic.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/hypervisor/arch/x86/apic.c b/hypervisor/arch/x86/apic.c
index d36c2033..e861ec2f 100644
--- a/hypervisor/arch/x86/apic.c
+++ b/hypervisor/arch/x86/apic.c
@@ -315,7 +315,7 @@ void apic_clear(void)
{
unsigned int maxlvt = (apic_ops.read(APIC_REG_LVR) >> 16) & 0xff;
unsigned int xlc = (apic_ext_features() >> 16) & 0xff;
- int n;
+ unsigned int n;
/* Enable the APIC - the cell may have turned it off */
apic_ops.write(APIC_REG_SVR, APIC_SVR_ENABLE_APIC | 0xff);
@@ -336,8 +336,8 @@ void apic_clear(void)
/* Clear ISR. This is done in reverse direction as EOI
* clears highest-priority interrupt ISR bit. */
- for (n = APIC_NUM_INT_REGS-1; n >= 0; n--)
- while (apic_ops.read(APIC_REG_ISR0 + n) != 0)
+ for (n = APIC_NUM_INT_REGS; n > 0; n--)
+ while (apic_ops.read(APIC_REG_ISR0 + n - 1) != 0)
apic_ops.write(APIC_REG_EOI, APIC_EOI_ACK);
/* Consume pending interrupts to clear IRR.
--
2.26.2
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