[ 07/75] usb: dwc3: core: dont forget to free coherent memory

From: Greg Kroah-Hartman
Date: Mon Mar 18 2013 - 18:02:55 EST

3.8-stable review patch. If anyone has any objections, please let me know.


From: Felipe Balbi <balbi@xxxxxx>

commit d9b4330adec006c2e8907bdcacd9dcc0e8874d18 upstream.

commit 3921426 (usb: dwc3: core: move
event buffer allocation out of
dwc3_core_init()) introduced a memory leak
of the coherent memory we use as event
buffers on dwc3 driver.

If the driver is compiled as a dynamically
loadable module and use constantly loads
and unloads the driver, we will continue
to leak the coherent memory allocated during
->probe() because dwc3_free_event_buffers()
is never called during ->remove().

Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/usb/dwc3/core.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -575,6 +575,7 @@ static int dwc3_remove(struct platform_d

+ dwc3_free_event_buffers(dwc);

return 0;

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