From b94badbb47cb50f4fca8440efdaa8ebd32604fe4 Mon Sep 17 00:00:00 2001
From: Dmitry Torokhov <dtor@insightbb.com>
Date: Tue, 1 Aug 2006 22:33:34 -0400
Subject: [PATCH] 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>
---
drivers/usb/core/usb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 184c24660a4c57..ab766e0fe4ef3a 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);
}
--
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