[PATCH] powerpc: udbg updates
The udbg low level io layer has an issue with udbg_getc() returning a
char (unsigned on ppc) instead of an int, thus the -1 if you had no
available input device could end up turned into 0xff, filling your
display with bogus characters. This fixes it, along with adding a little
blob to xmon to do a delay before exiting when getting an EOF and fixing
the detection of ADB keyboards in udbg_adb.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index cc2df5e..a058285 100644
--- 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_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 @@
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;
}