Change in coreboot[master]: arch/x86/ioapic: Allow IOAPIC with only one vector

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/58423 )

Change subject: arch/x86/ioapic: Allow IOAPIC with only one vector
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arch/x86/ioapic: Allow IOAPIC with only one vector

Remove the test for count=0 that leaked from drivers/generic/ioapic
implementation. See commit ea2fb8d80 and commit 8cc25d229.

Change-Id: I26944b930851fbea160c844ea46e2faa61c9af8e
Signed-off-by: Kyösti Mälkki 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58423
Tested-by: build bot (Jenkins) 
Reviewed-by: Nico Huber 
---
M src/arch/x86/ioapic.c
1 file changed, 3 insertions(+), 3 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Nico Huber: Looks good to me, approved

diff --git a/src/arch/x86/ioapic.c b/src/arch/x86/ioapic.c
index 22d979d..d299e60 100644
--- a/src/arch/x86/ioapic.c
+++ b/src/arch/x86/ioapic.c
@@ -35,9 +35,9 @@
    u8 count;

reg = io_apic_read(ioapic_base, 0x01);
-	count = reg >> 16;
+	count = (reg >> 16) & 0xff;

-	if (!count || count == 0xff)
+	if (count == 0xff)
    	count = 23;
    count++;

@@ -54,7 +54,7 @@
    u8 count;

reg = io_apic_read(ioapic_base, 0x01);
-	count = reg >> 16;
+	count = (reg >> 16) & 0xff;
    if (mre_count > 0)
    	count = mre_count - 1;
    reg &= ~(0xff << 16);

2 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.