x86/iommu: correct ICS register offset

According to Intel Vt-D specs, the offset of Invalidation complete
status register should be 0x9C, not 0x98.

See Intel's VT-d spec, Revision 1.3, Chapter 10.4, Page 98;

Signed-off-by: Li, Zhen-Hua <zhen-hual@hp.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 78e2ada..d380c5e 100644 (file)
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -55,7 +55,7 @@
 #define DMAR_IQT_REG   0x88    /* Invalidation queue tail register */
 #define DMAR_IQ_SHIFT  4       /* Invalidation queue head/tail shift */
 #define DMAR_IQA_REG   0x90    /* Invalidation queue addr register */
-#define DMAR_ICS_REG   0x98    /* Invalidation complete status register */
+#define DMAR_ICS_REG   0x9c    /* Invalidation complete status register */
 #define DMAR_IRTA_REG  0xb8    /* Interrupt remapping table addr register */
 
 #define OFFSET_STRIDE          (9)