[PATCH] IRQ/Platform-MSI:Increase the maximum MSIs the MSI framework can support.

From: MaJun
Date: Sun Dec 20 2015 - 22:19:12 EST


From: Ma Jun <majun258@xxxxxxxxxx>

The current MSI framework can only support 256 platform MSIs.

But on Hisilicon platform, some network related devices has about 500
wired interrupts.

To support these devices, we need a new maximum value more than 256.

Signed-off-by: Ma Jun <majun258@xxxxxxxxxx>
---
drivers/base/platform-msi.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index a203896..9c00d3f 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -24,7 +24,7 @@
#include <linux/msi.h>
#include <linux/slab.h>

-#define DEV_ID_SHIFT 24
+#define DEV_ID_SHIFT 22
#define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT))

/*
--
1.7.1


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