--- drivers/net/can/sja1000/sja1000.h

+++ drivers/net/can/sja1000/sja1000.h

@@ -165,6 +165,7 @@ struct sja1000_priv {

void __iomem *reg_base; /* ioremap'ed address to registers */

unsigned long irq_flags; /* for request_irq() */

+ spinlock_t cmdreg_lock; /* lock for concurrent cmd register writes */

u16 flags; /* custom mode flags */

u8 ocr; /* output control register */