[PATCH] powerpc: udbg updates

[linux-2.6-omap-h63xx.git] / arch / powerpc / kernel / udbg.c

diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index cc2df5e61bb068c50c0a5b2d6d71daf962d8e248..a058285a70e715f5bc08ea3faa359cb56fa9296f 100644 (file)
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -17,7 +17,7 @@
 #include <asm/processor.h>
 
 void (*udbg_putc)(char c);
-char (*udbg_getc)(void);
+int (*udbg_getc)(void);
 int (*udbg_getc_poll)(void);
 
 /* udbg library, used by xmon et al */
@@ -57,8 +57,8 @@ int udbg_write(const char *s, int n)
 
 int udbg_read(char *buf, int buflen)
 {
-       char c, *p = buf;
-       int i;
+       char *p = buf;
+       int i, c;
 
        if (!udbg_getc)
                return 0;
@@ -66,8 +66,11 @@ int udbg_read(char *buf, int buflen)
        for (i = 0; i < buflen; ++i) {
                do {
                        c = udbg_getc();
+                       if (c == -1 && i == 0)
+                               return -1;
+
                } while (c == 0x11 || c == 0x13);
-               if (c == 0)
+               if (c == 0 || c == -1)
                        break;
                *p++ = c;
        }