From: Dmitry Torokhov <dtor@insightbb.com>
Date: Wed, 2 Aug 2006 02:33:34 +0000 (-0400)
Subject: USB: Make usb_buffer_free() NULL-safe
X-Git-Tag: v2.6.19-rc1~899^2~115
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b94badbb47cb50f4fca8440efdaa8ebd32604fe4;p=linux-2.6

USB: Make usb_buffer_free() NULL-safe

kfree() handles NULL arguments which is handy in error handling paths as one
does need to  insert bunch of ifs. How about making usb_buffer_free() do the
same?

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 184c24660a..ab766e0fe4 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -761,7 +761,9 @@ void usb_buffer_free (
 )
 {
 	if (!dev || !dev->bus || !dev->bus->op || !dev->bus->op->buffer_free)
-	    	return;
+		return;
+	if (!addr)
+		return;
 	dev->bus->op->buffer_free (dev->bus, size, addr, dma);
 }