i2c-amd8111: Missed cleanup

[karo-tx-linux.git] / include / asm-sparc64 / parport.h

diff --git a/include/asm-sparc64/parport.h b/include/asm-sparc64/parport.h
index d3895873e4c715775c90346e06935c4384c0694d..284dfd01a33d5421cc7c96a4035e3aae0b375e9a 100644 (file)
--- a/include/asm-sparc64/parport.h
+++ b/include/asm-sparc64/parport.h
@@ -19,12 +19,45 @@
  */
 #define HAS_DMA
 
+static DEFINE_SPINLOCK(dma_spin_lock);
+
+#define claim_dma_lock() \
+({     unsigned long flags; \
+       spin_lock_irqsave(&dma_spin_lock, flags); \
+       flags; \
+})
+
+#define release_dma_lock(__flags) \
+       spin_unlock_irqrestore(&dma_spin_lock, __flags);
+
 static struct sparc_ebus_info {
        struct ebus_dma_info info;
        unsigned int addr;
        unsigned int count;
+       int lock;
 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
 
+static __inline__ int request_dma(unsigned int dmanr, const char *device_id)
+{
+       if (dmanr >= PARPORT_PC_MAX_PORTS)
+               return -EINVAL;
+       if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
+               return -EBUSY;
+       return 0;
+}
+
+static __inline__ void free_dma(unsigned int dmanr)
+{
+       if (dmanr >= PARPORT_PC_MAX_PORTS) {
+               printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
+               return;
+       }
+       if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
+               printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
+               return;
+       }       
+}
+
 static __inline__ void enable_dma(unsigned int dmanr)
 {
        ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);