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 184c246..ab766e0 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -761,7 +761,9 @@
)
{
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);
}