minimal fixes for drivers/usb/gadget/m66592-udc.c

still looks racy (and definitely leaks)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 23 deletions

diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index c0a962bb5f25..0174a322e007 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -937,6 +937,7 @@ static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
         *m66592->ep0_buf = status;
         m66592->ep0_req->buf = m66592->ep0_buf;
         m66592->ep0_req->length = 2;
+        /* AV: what happens if we get called again before that gets through? */
         m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
 }
 
@@ -1254,24 +1255,6 @@ static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
         kfree(req);
 }
 
-static void *m66592_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
-                                 dma_addr_t *dma, gfp_t gfp_flags)
-{
-        void *buf;
-
-        buf = kzalloc(bytes, gfp_flags);
-        if (dma)
-                *dma = virt_to_bus(buf);
-
-        return buf;
-}
-
-static void m66592_free_buffer(struct usb_ep *_ep, void *buf,
-                               dma_addr_t dma, unsigned bytes)
-{
-        kfree(buf);
-}
-
 static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
                         gfp_t gfp_flags)
 {
@@ -1378,9 +1361,6 @@ static struct usb_ep_ops m66592_ep_ops = {
         .alloc_request  = m66592_alloc_request,
         .free_request   = m66592_free_request,
 
-        .alloc_buffer   = m66592_alloc_buffer,
-        .free_buffer    = m66592_free_buffer,
-
         .queue          = m66592_queue,
         .dequeue        = m66592_dequeue,
 
@@ -1603,11 +1583,12 @@ static int __init m66592_probe(struct platform_device *pdev)
 
         the_controller = m66592;
 
+        /* AV: leaks */
         m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
         if (m66592->ep0_req == NULL)
                 goto clean_up;
-        m66592->ep0_buf = m66592_alloc_buffer(&m66592->ep[0].ep, 2, NULL,
-                                              GFP_KERNEL);
+        /* AV: leaks, and do we really need it separately allocated? */
+        m66592->ep0_buf = kzalloc(2, GFP_KERNEL);
         if (m66592->ep0_buf == NULL)
                 goto clean_up;