--- include/linux/msi.h

+++ include/linux/msi.h

@@ -14,8 +14,10 @@ struct irq_desc;

extern void mask_msi_irq(unsigned int irq);

extern void unmask_msi_irq(unsigned int irq);

extern void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);

+extern void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);

extern void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg);

extern void read_msi_msg(unsigned int irq, struct msi_msg *msg);

+extern void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);

extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);

struct msi_desc {