The lirc_serial.c module has never worked with ordinary homebrew
serial blaster hardware, and leaks memory when this is attempted.

Fix it by replacing incorrect usage of PTR_ERR() with IS_ERR().
(patch is inline and also attached to bypass mailer issues).

Signed-off-by: Mark Lord <mlord@pobox.com>

--- linux-2.6.37/drivers/staging/lirc/lirc_serial.c	2011-01-04
19:50:19.000000000 -0500
+++ linux/drivers/staging/lirc/lirc_serial.c	2011-02-06 15:33:49.854453928 -0500
@@ -966,7 +966,7 @@
 	if (n % sizeof(int) || count % 2 == 0)
 		return -EINVAL;
 	wbuf = memdup_user(buf, n);
-	if (PTR_ERR(wbuf))
+	if (IS_ERR(wbuf))
 		return PTR_ERR(wbuf);
 	spin_lock_irqsave(&hardware[type].lock, flags);
 	if (type == LIRC_IRDEO) {