sparc: prom: Sanitize return value from prom_nbputchar()
Signed-off-by: Julian Calaby <julian.calaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/prom/console_32.c b/arch/sparc/prom/console_32.c
index 4886310..b05e3db 100644
--- a/arch/sparc/prom/console_32.c
+++ b/arch/sparc/prom/console_32.c
@@ -27,13 +27,14 @@
spin_lock_irqsave(&prom_lock, flags);
switch(prom_vers) {
case PROM_V0:
- i = (*(romvec->pv_nbputchar))(*buf);
+ if ((*(romvec->pv_nbputchar))(*buf))
+ i = 1;
break;
case PROM_V2:
case PROM_V3:
if ((*(romvec->pv_v2devops).v2_dev_write)(*romvec->pv_v2bootargs.fd_stdout,
buf, 0x1) == 1)
- i = 0;
+ i = 1;
break;
default:
break;
@@ -47,7 +48,7 @@
{
while (len) {
int n = prom_nbputchar(buf);
- if (n)
+ if (n < 0)
continue;
len--;
buf++;