[PATCH v2] Irq/Platform-MSI:Increase the maximum MSIs the MSI framework can support.

MaJun majun258 at huawei.com
Mon Dec 21 18:47:22 PST 2015


From: Ma Jun <majun258 at huawei.com>

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 and align with MSI-X, this value is changed
to 2048.

Signed-off-by: Ma Jun <majun258 at huawei.com>
---
 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..47c4338 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	21
 #define MAX_DEV_MSIS	(1 << (32 - DEV_ID_SHIFT))
 
 /*
-- 
1.7.1





More information about the linux-arm-kernel mailing list