[ARM PATCH] 1961/1: S3C2410 - fix for UART FIFO size calculation

Patch from Ben Dooks

Fixes calculation of how many bytes in the RX/TX FIFOs.

Previous code failed to check wether the full flags 
where set before returning the byte counter. This
should ensure that the serial driver behaves correctly
when the FIFO fills, and not just ignore the input
data

include/asm-arm/arch-s3c2410/regs-serial.h

@@ -106,8 +106,23 @@
 
 /* fifo size information */
 
-#define S3C2410_UFCON_RXC(fcon)	  (((fcon) & S3C2410_UFSTAT_RXMASK) >> S3C2410_UFSTAT_RXSHIFT)
-#define S3C2410_UFCON_TXC(fcon)	  (((fcon) & S3C2410_UFSTAT_TXMASK) >> S3C2410_UFSTAT_TXSHIFT)
+#ifndef __ASSEMBLY__
+static inline int S3C2410_UFCON_RXC(int fcon)
+{
+	if (fcon & S3C2410_UFSTAT_RXFULL)
+		return 16;
+
+	return ((fcon) & S3C2410_UFSTAT_RXMASK) >> S3C2410_UFSTAT_RXSHIFT;
+}
+
+static inline int S3C2410_UFCON_TXC(int fcon)
+{
+	if (fcon & S3C2410_UFSTAT_TXFULL)
+		return 16;
+
+	return ((fcon) & S3C2410_UFSTAT_TXMASK) >> S3C2410_UFSTAT_TXSHIFT;
+}
+#endif /* __ASSEMBLY__ */
 
 #define S3C2410_UMSTAT_CTS	  (1<<0)
 #define S3C2410_UMSTAT_DeltaCTS	  (1<<2)