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path: root/drivers/input/serio/serport.c
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Diffstat (limited to 'drivers/input/serio/serport.c')
-rw-r--r--drivers/input/serio/serport.c28
1 files changed, 15 insertions, 13 deletions
diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index 8755f5f3ad37..0cb7ef59071b 100644
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -124,7 +124,7 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c
{
struct serport *serport = (struct serport*) tty->disc_data;
unsigned long flags;
- unsigned int ch_flags;
+ unsigned int ch_flags = 0;
int i;
spin_lock_irqsave(&serport->lock, flags);
@@ -133,18 +133,20 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c
goto out;
for (i = 0; i < count; i++) {
- switch (fp[i]) {
- case TTY_FRAME:
- ch_flags = SERIO_FRAME;
- break;
-
- case TTY_PARITY:
- ch_flags = SERIO_PARITY;
- break;
-
- default:
- ch_flags = 0;
- break;
+ if (fp) {
+ switch (fp[i]) {
+ case TTY_FRAME:
+ ch_flags = SERIO_FRAME;
+ break;
+
+ case TTY_PARITY:
+ ch_flags = SERIO_PARITY;
+ break;
+
+ default:
+ ch_flags = 0;
+ break;
+ }
}
serio_interrupt(serport->serio, cp[i], ch_flags);