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kvm tools: Fix up PCI pin assignment to conform specification

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Only 4 pins are allowed for every PCI compilant device as per PCI 2.2 spec
Section 2.2.6 ("Interrupt Pins"). Multifunctional devices can use up to all
INTA#,B#,C#,D# pins, for our single function devices pin INTA# is enough.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Cyrill Gorcunov
2011-05-07 19:02:57 +04:00
committed by Will Deacon
parent 384922b381
commit 33348d034d
1 changed files with 7 additions and 2 deletions
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irq.c
+7 -2
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@@ -7,7 +7,6 @@
#include <stddef.h>
#include <stdlib.h>
static u8 next_pin = 1;
static u8 next_line = 3;
static u8 next_dev = 1;
static struct rb_root pci_tree = RB_ROOT;
@@ -71,7 +70,13 @@ int irq__register_device(u32 dev, u8 *num, u8 *pin, u8 *line)
*node = (struct pci_dev) {
.id = dev,
.pin = next_pin++,
/*
* PCI supports only INTA#,B#,C#,D# per device.
* A#,B#,C#,D# are allowed for multifunctional
* devices so stick with A# for our single
* function devices.
*/
.pin = 1,
};
INIT_LIST_HEAD(&node->lines);