u8 __iomem *db; /* Door Bell */
u8 __iomem *pcicfg; /* PCI config space */
- spinlock_t mbox_lock; /* For serializing mbox cmds to BE card */
+ struct mutex mbox_lock; /* For serializing mbox cmds to BE card */
struct be_dma_mem mbox_mem;
/* Mbox mem is adjusted to align to 16 bytes. The allocated addr
* is stored for freeing purpose */