source: multiio/pcmmio/j.diff @ 0ecf946

mio_io_rtems.c

@@ -663 +681 @@
       #endif
 
       /*
-       * Buffer the interrupt
-       *
-       * NOTE: No need to worry about disabling interrupts,
-       *       we are in interrupts.
+       * Ensure there is space to buffer the interrupt
        */
+      if ( inptr == (outptr-1) || ((inptr == MAX_INTS) && outptr == 0)) {
+        pcmmio_dio_missed_interrupts++;
 
-      int_buffer[inptr].timestamp = rdtsc();
-      int_buffer[inptr].line = int_num;
-      inptr++;
-      if (inptr == MAX_INTS)
-        inptr = 0;
+        /* Clear the interrupt */
+        clr_int(int_num);
+        /* at last slot */
+      } else {
+        /*
+         * Buffer the interrupt
+         *
+         * NOTE: No need to worry about disabling interrupts,
+         *       we are in interrupts.
+         */
+        int_buffer[inptr].timestamp = rdtsc();
+        int_buffer[inptr].line = int_num;
+        inptr++;
+        if (inptr == MAX_INTS)
+          inptr = 0;
 
-      /* Clear the interrupt */
-      clr_int(int_num);
-    }
+        /* Clear the interrupt */
+        clr_int(int_num);
 
-    /* Wake up anybody waiting for a DIO interrupt */
-    wake_up_interruptible(&wq_dio);
+        /* Wake up anybody waiting for a DIO interrupt */
+        wake_up_interruptible(&wq_dio);
+      }
+    }
   }
 
   if (status & 0x10) {